Designed by:
Sobré 3D Profile
Assembly Manual
George Hicks
&
Jon Leyland
Specifications
Wingspan: 33.25 in (845mm)
Length: 34.5 in (875mm)
Wing Area: 260 sq in (16.8 sq dm)
Weight w/o Battery: 6.25–7.5 oz (175–215 g)
Weight w/ Battery: 7.5–9.25 oz (215–260 g)
Table of Contents
Introduction
Specifications ........................................................................ 1
Introduction ........................................................................... 2
Using the Manual ..................................................................
Contents of Kit/Parts Layout ...................................................
Required Radio Equipment .....................................................
Outrunner Setup ....................................................................
Variable Pitch Prop Outrunner Setup ......................................
Optional Accessories .............................................................
Note on Lithium Polymer Batteries ...........................................
Required Tools and Adhesives ................................................
Warning ............................................................................... 5
Warranty Period
Limited Warranty ...................................................................
Damage Limits ......................................................................
Safety Precautions .................................................................
Questions, Assistance, and Repairs ........................................
Inspection or Repairs .............................................................
Warranty Inspection and Repairs ...........................................
Non-Warranty Repairs ..........................................................
Safety, Precautions, and Warnings .........................................
Airframe Assembly ................................................................
Installing the Bracing ...........................................................
Radio Installation .................................................................
Motor and Battery Installation ..............................................
Optional Variable Pitch Prop Installation ...............................
Landing Gear Installation .....................................................
Installing the Side Force Generators ......................................
Control Throws ....................................................................
Center of Gravity .................................................................
Range Testing the Radio .......................................................
Preflight .............................................................................. 29
Flying the Sobré ..................................................................
2007 Official AMA National Model Aircraft Safety Code ......
.................................................................... 5
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31
The Sobré 3D Profile was designed by George Hicks and Jon
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Leyland, the Sobré 3D ARF has superb slow flight responsiveness
so you can fly high-alpha 3D with authority.
Its carbon fiber reinforced Depron foam construction that provides
the solid, precise feel of a balsa profile plane without the weight.
This allows you to fly the Sobré 3D either inside or outside.
The Sobré is constructed from 3mm laser-cut Depron foam—the
standard for durability and quality for pro 3D foamie pilots
everywhere. All pieces come with a vibrant screen printed trim
scheme.
Carbon Rod Reinforcement
Much of the exceptional flight performance of the Sobré comes
from its carbon-reinforced airframe that eliminates flex so control
response is crisp and precise. The leading and trailing edges of
the wing come out of the box with factory-applied carbon strips.
Carbon rods are also included that further strengthen the fuselage
and tail.
Using the Manual
This manual is divided into sections to help make assembly
easier to understand, and to provide breaks between each major
section. In addition, check boxes have been placed next to each
step to keep track of each step completed. Steps with a single
circle (
indicate that the step will require repeating, such as for a right or
left wing panel, two servos, etc.
Remember to take your time and follow the directions.
) are performed once, while steps with two circles ( )
2 E-flite Sobré 3D Profile Assembly Manual
Contents of Kit/Parts Layout
Required Radio Equipment
Small Replacement Parts
EFL1101 Pushrods
EFL1102 Carbon Fiber Stiffeners
EFL2305 Wheel Pants
EFL2306 Firewall Mount w/Hardware
EFL2309 Landing Gear
EFLA200 Micro Control Horns
EFLA203 Micro Control Connectors
EFLA221 Foam Park Wheels, 1.5
-inch
You will need a minimum 6-channel transmitter (for proper
mixing and dual rate capabilities), crystals, micro receiver, and
four sub-micro servos. You can choose to purchase a complete
radio system that includes all of these items or, if you are using
an existing transmitter, just purchase the other required equipment
separately. We recommend the crystal-free, interference-free
Spektrum™ DX6 2.4GHz DSM® 6-channel system, which includes
a micro receiver and 4 sub-micro 7.5-gram servos. If using
™
your own transmitter, we recommend the use of a JR SPORT
®
6-channel UltraLite receiver and E-flite
S60 Super Sub-Micro
servos.
If you own the Spektrum DX7 radio, just add the AR6100
DSM2® 6-channel receiver and four of our E-flite S60 Super
6-gram Sub-Micro servos (EFLRS60).
Complete Radio System
®
SPM2460 DX6 DSM
6CH Park Flyer w/4-S75
Or Purchase Separately
JSP30610 6-Channel UltraLite Rx w/o Crystal, Positive Shift
JR/AIR (72MHz)
JSP30615 6-Channel UltraLite Rx w/o Crystal, Negative
Shift Fut/HRC (72MHz)
JRPXFR** FM Receiver Crystal (JR only,
not Spektrum receivers)
Or
SPM6000 AR6000 DSM 6CH Park Flyer Receiver
Or
SPM6100 AR6100 DSM2 6CH Rx (for DX7 only)
And
EFLRS60 6.0-Gram Super Sub-Micro Servo (4)
(5th servo with optional Variable Pitch Propeller,
S75 servo required)
3E-flite Sobré 3D Profile Assembly Manual
Outrunner Setup
Alternative Cyclon Outrunner Setup
EFLM1150 Park 300 Brushless Outrunner Motor, 1380Kv
EFLA1010 10-Amp Pro Brushless ESC
APC08038SF 8x3.8 Slow Flyer Prop
Or
APC09047SF 9x4.7 Slow Flyer Prop (George Hicks setup)
THP4803SJPL 480mAh 3-Cell 11.1V Li-Po, JST
EFLC3005 Celectra™ 1–3 Cell Li-Po Charger
Note: If you want more power, substitute the
recommended Park 300 BL Outrunner, 1380Kv
(EFLM1150) with the Park 370 BL Outrunner, 1200Kv
with 4mm Hollow Shaft (EFLM1210HS). This motor is not
just for variable pitch props, it has great performance for
this size model.
Variable Pitch Prop Outrunner Setup
EFLPVPP100 Showstopper Precision Variable
Pitch Prop System
EFLM1210HS Park 370 BL Outrunner, 1200Kv w/4mm Hollow
Shaft
EFLA1010 10-Amp Pro Brushless ESC
THP7303SJPL 730mAh 3-Cell 11.1V Li-Po, JST
EFLC3005 Celectra 1–3 Cell Li-Po Charger
CYLCPLR05 CYLCPLR05
EFLM1961 Carbon Fiber Tube, 6", 8mm OD, 1/4" ID
EFLA1010 10-Amp Pro Brushless ESC
APC09038SF 9x3.8 Slow Flyer Prop
THP7303SJPL 730mAh 3-Cell 11.1V Li-Po, JST
EFLC3005 Celectra™ 1–3 Cell Li-Po Charger
Required Tools and Adhesives
Tools & Equipment
EFLA250 Park Flyer Tool Assortment, 5-piece
Or Purchase Separately
EFLA257 Screwdriver, #0 Phillips (or included with
EFLA250)
Cardstock
Drill
1
/
Drill bit:
Hobby knife
Felt-tipped pen
Side cutters
Pliers
String
Square
Sandpaper
Adhesives
-inch (1.5mm)
16
Optional Accessories
EFLA110 Power Meter
4 E-flite Sobré 3D Profile Assembly Manual
EFLA209 Foam Compatible CA, Medium
EFLA207 Foam Compatible Activator
Low Temperature Hot Glue
Note on Lithium Polymer Batteries
Limited Warranty
Lithium Polymer batteries are significantly more
volatile than alkaline or Ni-Cd/Ni-MH batteries used
in RC applications. All manufacturer’s instructions
and warnings must be followed closely. Mishandling
of Li-Po batteries can result in fire. Always follow the
manufacturer’s instructions when disposing of Lithium
Polymer batteries.
Warning
An RC aircraft is not a toy! If misused, it can cause serious bodily
harm and damage to property. Fly only in open areas, preferably
at AMA (Academy of Model Aeronautics) approved flying sites,
following all instructions included with your radio.
Keep loose items that can get entangled in the propeller away
from the prop, including loose clothing, or other objects such as
pencils and screwdrivers. Especially keep your hands away from
the propeller.
Warranty Period
Horizon Hobby, Inc., (Horizon) warranties that the Products
purchased (the “Product”) will be free from defects in materials
and workmanship at the date of purchase by the Purchaser.
(a) This warranty is limited to the original Purchaser ("Purchaser")
and is not transferable. REPAIR OR REPLACEMENT AS PROVIDED
UNDER THIS WARRANTY IS THE EXCLUSIVE REMEDY OF THE
PURCHASER. This warranty covers only those Products purchased
from an authorized Horizon dealer. Third party transactions are
not covered by this warranty. Proof of purchase is required for
warranty claims. Further, Horizon reserves the right to change
or modify this warranty without notice and disclaims all other
warranties, express or implied.
(b) Limitations- HORIZON MAKES NO WARRANTY OR
REPRESENTATION, EXPRESS OR IMPLIED, ABOUT NONINFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE OF THE PRODUCT. THE PURCHASER
ACKNOWLEDGES THAT THEY ALONE HAVE DETERMINED THAT
THE PRODUCT WILL SUITABLY MEET THE REQUIREMENTS OF
THE PURCHASER’S INTENDED USE.
(c) Purchaser Remedy- Horizon's sole obligation hereunder
shall be that Horizon will, at its option, (i) repair or (ii) replace,
any Product determined by Horizon to be defective. In the event
of a defect, these are the Purchaser's exclusive remedies. Horizon
reserves the right to inspect any and all equipment involved in a
warranty claim. Repair or replacement decisions are at the sole
discretion of Horizon. This warranty does not cover cosmetic
damage or damage due to acts of God, accident, misuse, abuse,
negligence, commercial use, or modification of or to any part
of the Product. This warranty does not cover damage due to
improper installation, operation, maintenance, or attempted
repair by anyone other than Horizon. Return of any goods
by Purchaser must be approved in writing by Horizon before
shipment.
5E-flite Sobré 3D Profile Assembly Manual
Damage Limits
Questions, Assistance, and Repairs
HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT
OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR
PRODUCTION OR COMMERCIAL LOSS IN ANY WAY
CONNECTED WITH THE PRODUCT, WHETHER SUCH CLAIM IS
BASED IN CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT
LIABILITY. Further, in no event shall the liability of Horizon exceed
the individual price of the Product on which liability is asserted.
As Horizon has no control over use, setup, final assembly,
modification or misuse, no liability shall be assumed nor accepted
for any resulting damage or injury. By the act of use, setup or
assembly, the user accepts all resulting liability.
If you as the Purchaser or user are not prepared to accept the
liability associated with the use of this Product, you are advised
to return this Product immediately in new and unused condition to
the place of purchase.
Law: These Terms are governed by Illinois law (without regard to
conflict of law principals).
Safety Precautions
This is a sophisticated hobby Product and not a toy. It must be
operated with caution and common sense and requires some
basic mechanical ability. Failure to operate this Product in a safe
and responsible manner could result in injury or damage to the
Product or other property. This Product is not intended for use
by children without direct adult supervision. The Product manual
contains instructions for safety, operation and maintenance. It is
essential to read and follow all the instructions and warnings in
the manual, prior to assembly, setup or use, in order to operate
correctly and avoid damage or injury.
Your local hobby store and/or place of purchase cannot provide
warranty support or repair. Once assembly, setup or use of the
Product has been started, you must contact Horizon directly. This
will enable Horizon to better answer your questions and service
you in the event that you may need any assistance. For questions
or assistance, please direct your email to productsupport@
horizonhobby.com, or call 877.504.0233 toll free to speak to a
service technician.
Inspection or Repairs
If this Product needs to be inspected or repaired, please call for
a Return Merchandise Authorization (RMA). Pack the Product
securely using a shipping carton. Please note that original boxes
may be included, but are not designed to withstand the rigors
of shipping without additional protection. Ship via a carrier that
provides tracking and insurance for lost or damaged parcels, as
Horizon is not responsible for merchandise until it arrives and is
accepted at our facility. A Service Repair Request is available at
www.horizonhobby.com on the “Support” tab. If you do not have
internet access, please include a letter with your complete name,
street address, email address and phone number where you
can be reached during business days, your RMA number, a list
of the included items, method of payment for any non-warranty
expenses and a brief summary of the problem. Your original sales
receipt must also be included for warranty consideration. Be sure
your name, address, and RMA number are clearly written on the
outside of the shipping carton.
Warranty Inspection and Repairs
To receive warranty service, you must include your original
sales receipt verifying the proof-of-purchase date. Provided
warranty conditions have been met, your Product will be repaired
or replaced free of charge. Repair or replacement decisions are
at the sole discretion of Horizon Hobby.
6 E-flite Sobré 3D Profile Assembly Manual
Non-Warranty Repairs
Safety, Precautions, and Warnings
Should your repair not be covered by warranty the repair will
be completed and payment will be required without notification
or estimate of the expense unless the expense exceeds 50%
of the retail purchase cost. By submitting the item for repair
you are agreeing to payment of the repair without notification.
Repair estimates are available upon request. You must include
this request with your repair. Non-warranty repair estimates will
be billed a minimum of ½ hour of labor. In addition you will
be billed for return freight. Please advise us of your preferred
method of payment. Horizon accepts money orders and cashiers
checks, as well as Visa, MasterCard, American Express, and
Discover cards. If you choose to pay by credit card, please
include your credit card number and expiration date. Any
repair left unpaid or unclaimed after 90 days will be considered
abandoned and will be disposed of accordingly.
non-warranty repair is only available on electronics and model
engines.
Electronics and engines requiring inspection or repair should be
shipped to the following address:
Horizon Service Center
4105 Fieldstone Road
Champaign, Illinois 61822
All other Products requiring warranty inspection or repair should
be shipped to the following address:
Horizon Product Support
4105 Fieldstone Road
Champaign, Illinois 61822
Please note:
As the user of this product, you are solely responsible for
operating it in a manner that does not endanger yourself and
others or result in damage to the product or the property of
others.
Carefully follow the directions and warnings for this and any
optional support equipment (chargers, rechargeable battery
packs, etc.) that you use.
This model is controlled by a radio signal that is subject to
interference from many sources outside your control. This
interference can cause momentary loss of control so it is
necessary to always keep a safe distance in all directions around
your model, as this margin will help to avoid collisions or injury.
• Always operate your model in an open area away from cars,
traffic, or people.
• Avoid operating your model in the street where injury or
damage can occur.
• Never operate the model out into the street or populated areas
for any reason.
• Never operate your model with low transmitter batteries.
• Carefully follow the directions and warnings for this and any
optional support equipment (chargers, rechargeable battery
packs, etc.) that you use.
• Keep all chemicals, small parts and anything electrical out of
the reach of children.
• Moisture causes damage to electronics. Avoid water exposure
to all equipment not specifically designed and protected for this
purpose.
Please call 877-504-0233 with any questions or concerns
regarding this product or warranty.
7E-flite Sobré 3D Profile Assembly Manual
Airframe Assembly
Required Parts
Vertical fuselage
Horizontal fuselage
Wing w/ailerons
Stabilizer w/elevators
Motor mount
Required Tools and Adhesives
Foam-compatible CA, Medium
Foam-compatible accelerator (can be used to speed up cure time)
Square
1. Locate the vertical and horizontal fuselage pieces.
Slide the horizontal fuselage into the vertical fuselage
starting at the opening for the wing/radio equipment.
Use care not to damage any of the alignment tabs on
the vertical fuselage.
2. Locate the wing and slide it into the vertical
fuselage underneath the horizontal fuselage. Use
care not to damage either the vertical or horizontal
fuselage pieces.
Hint: Fold one of the ailerons up and onto the wing
to make it a little narrower to install into the fuselage.
Push the wing past center to move the aileron back into
position, then center the wing.
8 E-flite Sobré 3D Profile Assembly Manual
3. Slide the horizontal stabilizer into the fuselage,
being careful not to damage any of the alignment
tabs. You may need to move the horizontal fuselage
out of the vertical fuselage slightly to get the stabilizer
into position.
Note: Trim the hinge tape at the rear of the stabilizer to
provide clearance of the alignment hole.
4. Align the wing with the horizontal fuselage.
Use foam-compatible CA to glue the wing to ONLY
the horizontal fuselage.
Hint: Use the holes for the aileron servos to aid in the
alignment between the horizontal fuselage and wing.
Note: There are slots at the front and rear of the wing.
Lightly lift the area and apply CA underneath for a
greater gluing area.
Important: If you plan on using CA activator, make sure
it is foam compatible. Many accelerators will destroy the
foam used on this model.
9E-flite Sobré 3D Profile Assembly Manual
5. Measure from the wing tip to the elevator tip on
each side of the airframe. The measurements will
be the same when the stabilizer/elevator has been
aligned with the wing. Use T-pins to hold the stabilizer
in position for the next step.
6. Use foam-compatible CA to glue the stabilizer to
ONLY the horizontal fuselage.
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7. Place the motor mount in position to aid in the
alignment of the vertical and horizontal fuselage
pieces. DO NOT glue the mount until instructed to
do so. Position the horizontal and vertical fuselage
pieces until the mount rests flush against both.
8. Apply foam-compatible CA to the joint between
the vertical and horizontal fuselage pieces from the
leading edge of the wing to the front of the fuselage.
Use a square to make sure the two pieces are
aligned. Apply CA to both the top and bottom of the
vertical fuselage.
9. Complete gluing the vertical and horizontal
fuselage pieces together. Continue to use a square
to keep both pieces in alignment.
11E-flite Sobré 3D Profile Assembly Manual
Installing the Bracing
Required Parts
Assembled airframe
Carbon rod, 4.6-inch (117mm) (2)
Carbon rod, 5.9-inch (150mm) (2)
Carbon rod, 4.3-inch (110mm) (2)
Carbon rod, 3.9-inch (100mm) (4)
Carbon rod, 3.75-inch (95mm) (4)
Carbon rod, 12.7-inch (323mm) (2)
Carbon rod, 12-inch (305mm) (2)
Required Tools and Adhesives
Foam-compatible CA, Medium
Sandpaper
Hobby knife
Side cutters
Eye protection
Note: It is important that each carbon rod attaches to
the next, and to the carbon blade spars on the edges
of the foam. This is necessary to provide the stiffest
airframe possible.
1. Locate the two 4.6-inch (117mm) carbon rods. Pass
the rods through the fin and stabilizer. Butt the rods
together in the fin and use foam-compatible CA to
glue the rods to the fin ONLY at this time.
2. Use a square to align the stabilizer with the fin.
Once the fin is perpendicular to the stabilizer, use
Foam-compatible CA to glue the carbon rod to the
stabilizer. Square each side before gluing the rod on
that particular side.
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3. Position the carbon rods in the fuselage, gluing the
rods to the vertical fuselage ONLY. This will allow for
alignment of the fuselage in the next step.
Note: The length of the rods are:
XL = 5.9-inch (150mm)
L = 4.3-inch (110mm)
M = 3.9-inch (100mm)
S = 3.75-inch (95mm)
4. With the airframe upright, check that the stabilizer
is parallel to the wing. Lightly twist the fuselage as
necessary for alignment.
5. Use side cutters to trim any excess carbon rods
that extend beyond the top of the horizontal fuselage.
With the rods resting tightly against the carbon spine
and each other, use foam-compatible CA to glue the
intersection of the rods to the carbon blade spars.
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Important: Make sure to use eye protection when cutting
the carbon rods.
Radio Installation
Required Parts
6. Installing the wing bracing is similar to installing
the fuselage bracing, as you want the rods to be
glued to the carbon bracing that has been preinstalled on the wing and fuselage. The longer
12.7-inch (323mm) rod is positioned toward the
aileron, while the shorter 12-inch (305mm) rod is
toward the leading edge. The rods are staggered and
fit into notches in the fuselage. Make sure the rods
are straight and are not flexing the wing. Use Foamcompatible CA to glue the rods in position. The wing
should be flat and parallel to the horizontal stabilizer,
while also being perpendicular to the vertical
fuselage. Use side cutters to trim away any excess
carbn rod.
Airframe
Servos (4)
Micro control connector (4)
Control connector backplate (4)
Micro control horn (4)
Control horn backplate (4)
2mm x 4mm screw (4)
Aileron pushrods, 4.5-inch (115mm) (2)
Rudder pushrod, 19.25-inch (490mm)
Elevator pushrod, 18.5-inch (470mm)
Hook and loop material
Required Tools and Adhesives
Foam-compatible CA, Medium
Low-temperature hot glue
1
/
Drill bit:
-inch (1.5mm)
16
Screwdriver, #0 Phillips
1. Install the micro control horn on the aileron using
the control horn backplate. Use a couple drops
of Foam-compatible CA to keep the backplate in
position.
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2. Install the elevator micro control horns at this time.
Make sure the rudder horn extends opposite of the
elevator horn.
3. Install the rudder micro control horns at this time as
well. Make sure the rudder horn extends opposite of
the elevator horn.
4. Remove the servo arms from the four servos. Drill
1
/
-inch (1.5mm) hole in the end of all four of the
a
16
servo arms.
Note: We then suggest using the longest servo arms
available for your servo to help achieve maximum control
throws for 3D flying.
5. Slide a micro control connector into the hole drilled
in the previous step. Secure the connector using a
control connector backplate from the opposite side of
the connector. Repeat for all four servo arms.
Note: The connectors will face out away from the servo
when installed. Remove any unused sides or portions of
the servo arms.
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6. Plug the servos into the receiver. Turn on the
transmitter and receiver and check the operation of
the servos. After centering the trims and sub-trims,
attach the servo arms as shown. Note the direction of
the arms on the servos.
7. Use hot glue to install the aileron servos.
Note: The servo arms face toward the tips of the wing
and the output shaft of the servo is toward the leading
edge of the wing.
8. Install the rudder and elevator servos using hot
glue. The output shafts of both servos face the front
of the aircraft.
Note: Position the aileron servo arm parallel to the
aileron hinge line.
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9. Locate the 4.5-inch (115mm) pushrod. Install
the “Z” bend into the middle hole of the control
horn that is one away from the aileron. Pass the
pushrod through the connector. Check that the
aileron servo is centered using the radio and
parallel to the aileron hinge line. Hold the aileron
parallel to the wing and use the 2mm x 4mm screw
in the connector to secure the pushrod wire. Repeat
for the other aileron pushrod.
10. Install the 19.25-inch (490mm) pushrod for the
rudder, and the 18.5-inch (470mm) pushrod for the
elevator. The rudder pushrod goes under the stabilizer
brace and on the outside of the fuselage bracing.
Don’t forget to check to make sure the servos and
control surfaces are centered before tightening the
2mm x 4mm screws. Slide the pushrod braces into
the notches in the fuselage so the pushrods can move
freely. Use Foam-compatible CA to glue the pushrod
guides to the fuselage.
Note: Use the hole in the control horn closest to the
aileron for the greatest amount of throw. Moving the
pushrod outward, away from the aileron, will result in
gradually decreasing the control throws.
17E-flite Sobré 3D Profile Assembly Manual
Note: The rudder and elevator pushrods attach to the
inside hole of the control horns.
Motor and Battery Installation
Required Parts
Airframe
Plywood motor mount
Motor w/hardware
Electronic speed control
Propeller
#2 x 8mm or #3 x 8mm wood screw (included with motor)
Hook and loop material
Required Tools and Adhesives
Foam-compatible CA, Medium
1
/
Drill bit:
Cardstock
Felt-tipped pen
Hobby knife
Screwdriver, #0 Phillips
-inch (1.5mm)
16
11. Install the receiver using hook and loop material.
The exact position of the receiver may change,
depending on how your aircraft balances.
18 E-flite Sobré 3D Profile Assembly Manual
Optional
Variable pitch prop
Sub-micro servo (1)
1. Locate the plywood motor mount and aluminum
X-mount for your particular motor. Center the motor
mount on the plywood and mark the holes for the
mounting screws using a felt-tipped pen making sure
the holes you mark do not interfere with the carbon
spars the mount will glue into.
2. Drill pilot holes for the mounting holes marked
1
/
on the plywood mount using a
-inch (1.5mm)
16
drill bit.
Hint: If the hole in your mount matches the diameter of
the hole in the plywood mount, use a rolled-up piece
of cardstock placed through the two holes to center the
motor mount on the plywood mount.
19E-flite Sobré 3D Profile Assembly Manual
3. Reposition the shaft on the motor as shown to allow
the use of the propeller adapter. Make sure to secure
the shaft using instructions included with your motor.
5. Attach the motor to the plywood mount using
two #2 x 8mm wood screws or two #3 x 8mm
wood screws.
4. Attach the mount to your particular motor.
20 E-flite Sobré 3D Profile Assembly Manual
6. Place the plywood motor mount in position.
Make sure the mount is tight against the vertical and
horizontal fuselage. Trim the fuselage as necessary
to provide clearance for the motor leads. Use Foamcompatible CA to securely glue the mount to the
vertical and horizontal fuselage.
7. Solder any necessary connectors to your speed
control. Plug the speed control into the throttle channel
of the receiver and to the motor. Use hook and loop to
secure the speed control to the fuselage.
Note: It is suggested to secure the motor wires to the
fuselage to prevent them from coming in contact with the
propeller or servos when performing extreme maneuvers.
Important Information About Your Brushless ESC
Make sure your ESC brake is programmed to Off. Also,
be sure to use an ESC with the proper 9V cutoff when
using 3-cell Li-Po packs, or 6V cutoff when using 2-cell
Li-Po packs.
21E-flite Sobré 3D Profile Assembly Manual
8. Turn on the transmitter and bring the throttle trim
and stick to the low throttle position. Plug the battery
into the speed control and check the operation of the
motor. It should rotate counterclockwise when viewed
from the front of the aircraft. Use the instructions
provided with your ESC to make corrections to the
direction of rotation of the motor if necessary.
9. Install the propeller using the instructions provided
with your motor or propeller system.
Important Information About Your Propeller
It is very important to check to be sure the propeller is
balanced before installing on the propeller shaft. An
unbalanced propeller may damage the motor, airframe
Note: Never check the motor rotation on the bench
with the propeller installed. The plane could move and
cause serious injury. Always check the motor without the
propeller to avoid injury.
and other components, or cause poor flight and
performance characteristics.
Note: If it is necessary to enlarge the hole in the
propeller, make sure to check the balance of the
propeller afterwards.
22 E-flite Sobré 3D Profile Assembly Manual
Optional Variable Pitch Prop Installation
Note: The following outlines the installation of a VPP
for your Sobré. Be sure to consult the manual for your
chosen variable pitch prop unit before proceeding with
installation of the pitch servo and linkage. Due to the
variety of VPP systems available, there may be some
variation in how the servo and linkage can be installed.
Install the motor and mount as described in the previous section.
You will have to trim the fuselage to allow for clearance of the
control linkage and servo.
1. Install the pitch servo as shown. Take your time to
make sure the servo horn and linkage does not bind
against the fuselage. Also check that the linkage is not
being put under a load when connected. Use a hobby
knife to remove any portions of the fuselage that
cause binding. Use foam-compatible CA or hot glue
to secure the servo to the fuselage.
2. Install the propeller using the instructions provided
with your motor or propeller system.
Note: If you are using a variable pitch propeller for your
Sobré, you should prepare the motor as instructed in the
instructions included with your propeller system.
3. Check that the linkage for your variable pitch
prop unit can move freely without binding on the
fuselage. Trim away any material necessary if any
binding is noticed.
23E-flite Sobré 3D Profile Assembly Manual
Landing Gear Installation
Required Parts
Note: Use care not to get CA on the wheel, preventing it
from rotating on the strut.
Airframe
Landing gear strut (2)
Wheel retainer (4)
Wheel pant (2)
1.5-inch (38mm) foam wheel (2)
Landing gear support disk (2)
Required Tools and Adhesives
Foam-compatible CA
The landing gear is optional. If you plan on saving
weight, or flying from very rough surfaces, it is suggested
to skip this section.
1. Locate the landing gear strut, two wheel retainers
and the wheel. Use Foam-compatible CA to install
the wheel retainer onto the strut. The retainers will
sandwich the wheel in position.
2. Pass the landing gear through the opening in the
fuselage and wing. DO NOT use glue until instructed
to do so.
3. Repeat Steps 1 and 2 for the remaining strut.
24 E-flite Sobré 3D Profile Assembly Manual
4. The struts should extend roughly
3
/
-inch (2.5mm)
32
through the top of the wing. This will give the landing
gear support disks plenty of strut to attach to.
Hint: You can just drop the disks into position and check
to make sure the strut extends beyond the disk instead of
measuring it.
6. Install the landing gear support disks using foam-
compatible CA. Make sure to glue the disks securely
to both the horizontal fuselage and landing gear
struts.
7. Use foam-compatible CA to glue the wheel pants
to the wheel retainers. Make sure the pants are
positioned so they won’t drag on the ground during
takeoff and landing before applying the CA.
5. Check that the wheels are parallel or have slight
toe-in. Use foam-compatible CA to glue the struts to
the fuselage and each other. Make sure the wing is
sitting parallel to the ground so the wheels are located
at the same height.
25E-flite Sobré 3D Profile Assembly Manual
Installing the Optional
Side Force Generators
Required Parts
Side force generator (upper) (2)
Side force generator (lower) (2)
Carbon rod, 4.3-inch (110mm) (4)
Required Tools and Adhesives
Foam-compatible CA
Square
Note: The side force generator (SFG) installation is
optional. If you plan on saving weight, or flying from
very rough surfaces, it is suggested to skip this section.
1. Locate the upper side force generator. Position
the SFG on the wing, aligning it with the two holes
that have been pre-drilled in the wing. Use a square
to position the SFG perpendicular to the wing. Use
Foam-compatible CA to glue the SFG to the wing.
2. Locate a 4.3-inch (110mm) carbon rod. Position
the rod in the predrilled holes in the SFG and wing.
Use foam-compatible CA to glue the carbon rod to the
SFG ONLY at this time.
26 E-flite Sobré 3D Profile Assembly Manual
3. Glue the bottom SFG into position. Glue the
4.3-inch (110mm) carbon rod to the SFG. Check
that the top and bottom SFGs are still perpendicular
to the wing. Use Foam-compatible CA to glue the
carbon rods to each other and to the wing.
Battery Installation
Required Parts
Battery
Hook and loop tape
1. Use hook and loop tape to secure the battery to
the underside of the wing. The location of the battery
can be adjusted to correct for the Center of Gravity
described later in this manual.
4. Repeat Steps 1 through 3 for the remaining upper
and lower SFG installation.
27E-flite Sobré 3D Profile Assembly Manual
Control Throws
The following are the control throws suggested by George Hicks:
Turn on the transmitter and receiver of your Sobré. Check
the movement of the rudder, elevator and ailerons using the
transmitter. Reverse the direction of the servos at the transmitter
if necessary.
Use a ruler to adjust the throw of the elevator, ailerons and
rudder. Adjust the position of the pushrod at the control horn to
achieve the following measurements when moving the sticks to
their endpoints.
Measurements are taken at the widest point on the surface.
Low Rate High Rate
Ailerons:
Up 2-inch (51mm) 3-inch (76mm)
Down 2-inch (51mm) 3-inch (76mm)
Elevator:
Up 1
Down 1
7
/
-inch (32mm) 2
8
7
/
-inch (32mm) 2
8
7
/
-inch (63mm)
8
7
/
-inch (63mm)
8
Rudder:
Right 1
Left 1
5
/
-inch (41mm) 2
8
5
/
-inch (41mm) 2
8
1
/
-inch (57mm)
4
1
/
-inch (57mm)
4
These are general guidelines measured from our own flight tests
and those of Jon Leyland. You can experiment with higher rates to
match your preferred style of flying.
Pattern Throws:
Ailerons:
Up 2-inch (51mm) (35 degrees)
Down 2
1
/
-inch (57mm) (40 degrees)
4
Expo 25%
Elevator:
Up 1
13
/
-inch (46mm) (40 degrees)
16
Down 2-inch (51mm) (45 degrees)
Expo 30%
Rudder:
Right 2-inch (51mm) (40 degrees)
Left 2-inch (51mm) (40 degrees)
Expo 35%
3D Throws:
Ailerons:
Up 2
Down 2
1
/
-inch (63mm) (45 degrees)
2
7
/
-inch (74mm) (55 degrees)
8
Expo 40%
Elevator:
Up 2
Down 2
1
/
-inch (63mm) (65 degrees)
2
5
/
-inch (58mm) (55 degrees)
16
Expo 50%
Rudder:
Right 2
Left 2
1
/
-inch (57mm) (45 degrees)
4
1
/
-inch (57mm) (45 degrees)
4
Expo 45%
(maximum available throws)
Note: George Hicks' recommended 3D throws should
be considered for advanced pilots only. George uses the
E-Flite 3D arms with the connecter all the way out (last
hole-most throw). He uses the lowest hole over the hinge
line at the control surface on all surfaces.
28 E-flite Sobré 3D Profile Assembly Manual
Center of Gravity
Range Testing the Radio
Caution: Do not inadvertently skip this step!
The recommended Center of Gravity (CG) location for the Sobré
1
/
is 3
-inch (89mm) behind the center of the leading edge of the
2
wing against the fuselage. After the first flights, the CG position
can be adjusted for your personal preference.
1. Be sure to range check your radio before each
flying session. This is accomplished by turning on your
transmitter with the antenna collapsed. Turn on the
receiver in your airplane. With your airplane on the
ground and the engine running, you should be able
to walk 30 paces (approximately 100 feet) away from
your airplane and still have complete control of all
functions. If not, don’t attempt to fly! Have your radio
equipment checked out by the manufacturer.
2. Double-check that all controls (aileron, elevator,
rudder and throttle) move in the correct direction.
3. Be sure that your transmitter batteries are fully
charged, per the instructions included with your radio.
Note: George Hicks CG location is 4-inch (100mm)
29E-flite Sobré 3D Profile Assembly Manual
Preflight
Flying the Sobré
Check Your Radio
Before going to the field, be sure that your batteries are fully
charged per the instructions included with your radio. Charge
both the transmitter and receiver pack for your airplane. Use the
recommended charger supplied with your particular radio system,
following the instructions provided with the radio. In most cases,
the radio should be charged the night before going out flying.
Before each flying session, be sure to range check your radio.
See your radio manual for the recommended range and
instructions for your radio system. Each radio manufacturer
specifies different procedures for their radio systems. Next, start
the motor. With the model securely anchored, check the range
again. The range test should not be significantly affected. If it is,
don’t attempt to fly! Have your radio equipment checked out by
the manufacturer.
Note: Keep loose items that can get entangled in
the propeller away from the prop. These include
loose clothing, or other objects such as pencils and
screwdrivers. Especially keep your hands away from the
propeller.
Double-check that all controls (aileron, elevator, rudder and
throttle) move in the correct direction.
Check the radio installation and make sure all the control
surfaces are moving correctly (i.e. the correct direction and with
the recommended throws). Test run the motor and make sure
it transitions smoothly from off to full throttle and back. Also
ensure the engine is installed according to the manufacturer’s
instructions, and it will operate consistently.
Flying the Sobré is about as fun as it can get at the park. A very
light wing loading and extreme control throws make for some
exciting 3D flying. Verify that your CG is at the correct location
as per the manual and that you have your rates set up to your
liking. Verify that all control throws are in the correct direction
and the motor spins in the correct direction as well.
Point the model into the wind and add some throttle trim until
the motor begins to turn. This will be your flight idle. Now, apply
power slowly. You will find the model will become airborne very
quickly and at a low speed. This model excels at flying slow and
easy, as well as slow and extreme. Trim the model for level flight
at half throttle. Only use full throttle for maneuvering. Do not fly
this model fast or at full throttle in level flight. Doing this will result
in the flight controls fluttering and a potential catastrophic failure
of the airframe.
You will find you can adjust the CG to your liking by moving the
battery pack fore or aft on the wing.
To land the Sobré just reduce the throttle to idle and feed in up
elevator until the model settles into a slightly nose high attitude.
Gently fly the model down to the landing spot with a final flair at
touchdown. You will find the model will have a very short roll out.
We hope you enjoy the Sobré as much as we do.
Happy landings.
Check all the control horns, servo horns, and clevises to make
sure they are secure and in good condition. Replace any items
that would be considered questionable. Failure of any of these
components in flight would mean the loss of your aircraft.
30 E-flite Sobré 3D Profile Assembly Manual
2007 Official AMA National Model Aircraft Safety Code
GENERAL
1) I will not fly my model aircraft in sanctioned events, air shows
or model flying demonstrations until it has been proven to be
airworthy by having been previously, successfully flight tested.
2) I will not fly my model higher than approximately 400 feet within 3
miles of an airport without notifying the airport operator. I will give
right-of-way and avoid flying in the proximity of full-scale aircraft.
Where necessary, an observer shall be utilized to supervise flying
to avoid having models fly in the proximity of full-scale aircraft.
3) Where established, I will abide by the safety rules for the flying
site I use, and I will not willfully or deliberately fly my models in a
careless, reckless and/or dangerous manner.
4) The maximum takeoff weight of a model is 55 pounds, except
models flown under Experimental Aircraft rules.
5) I will not fly my model unless it is identified with my name and
address or AMA number on or in the model. (This does not apply
to models while being flown indoors.)
6) I will not operate models with metal-bladed propellers or with
gaseous boosts, in which gases other than air enter their internal
combustion engine(s); nor will I operate models with extremely
hazardous fuels such as those containing tetranitromethane or
hydrazine.
RADIO CONTROL
1) I will have completed a successful radio equipment ground range
check before the first flight of a new or repaired model.
2) I will not fly my model aircraft in the presence of spectators until I
become a qualified flier, unless assisted by an experienced helper.
3) At all flying sites a straight or curved line(s) must be established
in front of which all flying takes place with the other side for
spectators. Only personnel involved with flying the aircraft are
allowed at or in front of the flight line. Intentional flying behind the
flight line is prohibited.
4) I will operate my model using only radio control frequencies
currently allowed by the Federal Communications Commission.
(Only properly licensed Amateurs are authorized to operate
equipment on Amateur Band frequencies.)
5) Flying sites separated by three miles or more are considered safe
from site-to-site interference, even when both sites use the same
frequencies. Any circumstances under three miles separation
require a frequency management arrangement, which may be
either an allocation of specific frequencies for each site or testing
to determine that freedom from interference exists. Allocation plans
or interference test reports shall be signed by the parties involved
and provided to AMA Headquarters.
Documents of agreement and reports may exist between (1) two
or more AMA Chartered Clubs, (2) AMA clubs and
individual AMA members not associated with AMA
Clubs, or (3) two or more individual AMA members.
6) For Combat, distance between combat engagement line
and spectator line will be 500 feet per cubic inch of engine
displacement. (Example: .40 engine = 200 feet.); electric motors
will be based on equivalent combustion engine size. Additional
safety requirements will be per the RC Combat section of the
current Competition Regulations.
7) At air shows or model flying demonstrations, a single straight line
must be established, one side of which is for flying, with the other
side for spectators.
8) With the exception of events flown under AMA Competition rules,
after launch, except for pilots or helpers being used, no powered
model may be flown closer than 25 feet to any person.
9) Under no circumstances may a pilot or other person touch a
powered model in flight.
31E-flite Sobré 3D Profile Assembly Manual
10242
© 2007 Horizon Hobby, Inc.
4105 Fieldstone Road
Champaign, Illinois 61822
(877) 504-0233
horizonhobby.com
E-fliteRC.com
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