OMP Hobby Bighorn User guide

OMP Hobby 49” Bighorn is a sport RC model airplane built in the traditional way: balsa and film cover.
The airplane features light yet strong structure, and abundant power, making the airplane easy to fly and
capable of a lot of advanced aerobatics, such as hover. The big wheels provide enough clearance for easy
takeoff and landing on grass field. Flaps (if equipped) of the airplane makes it ideal for short field takeoff
and landing, and air brake in crow configuration.

The optional 49” Bighorn receiver ready version is an almost completed finished kit in factory. Motor, ESC,
servos, Ailerons, flaps, elevator, are all installed. Landing gear is preassembled. Propeller is included in the
kit. It takes no more than an hour to put the kit together and ready for the sky.

Wingspan

49in（1250mm）

Wing Area: 27.4dm² or 425
square inches

Motor: Sunnysky X2820
1100KV Outrunner

Propeller: SunnySky Eolo
12x6.5” electric propeller

www.OMPHobby.com www.OhioModelProducts.com

Length

41in（1040mm）

Wing Loading: 49.7~51.5g/dm² Flying Weight: 1365~1410g

ESC: 40A

Servos: 6 (flap version) or 4
(non-flap version) of 17g
OMPHOBBY metal gear digital
servos.

CG: 58‐ 66mmfromtheleading

edgeofmainwings

Battery: 3S 11.1V LiPo,
2200~3000mAh

Flight time: 5~12 minutes

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Three color schemes available

Packagecontents(receiverreadyversion)

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11

10

9

8

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1. Fuselage

2. Lefthalf wing

3. Righthalfwing

4. Horizontal

stabilizer

5. Rudder

6. Tube

7. Adhesive

Velcro

8. Spinner

9. Link Rods

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3

4

5

10. Landinggear

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11. Propeller

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MainFeaturesoftheAirplane(receiverreadyversion)

*Mainlandinggearhasbeenassembledin
factory.
*Allballtierodsarepreassembled.
*Allservohornshavealreadybeeninstalled.
*Allballjointshavebeeninstalled.
*Hingeslotsarecutinfactory.

*Servoleadstapedforeasyaccess.
*Thecowlisinstalledinfactory.

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1. Insert the horizontal stabilizer into the
fuselage.

Horizontal stabilizer and
elevator installation

3. Appy CA glue to secure horizontal
stabilizer.

2. Insert the carbon tube of main wings into
fuselage, to ensure that the horizontal
stabilizer is parallel to the carbon tube.

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1. Insert rudder hinges into slots in vertical
stabilizer.

Rudder Installation

3. Apply thin CA glue to secure the hinges.

2. Ensure that there is 1 ~ 2mm
clearance between fuselage and rudder.

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1. The mounting screws of landing gear are
installed on the fuselage to prevent missing
parts.

Landing Gear Installation

3. Align the landing gear to the hole locations
and tighten the three screws. Application of
threadlocker is highly recommended.

2. Take out the screws from the bottom of
fuselage with 2.5mm Alan screwdriver.

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Align tail wheel
assembly to the rear
bottom of fuselage
as shown in the
photos. Make sure
the gear is centered
and pivot is aligned
to rudder hinges.
Install screws at
locations as shown in
the photos.

Installation

of Tail Wheel

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1. Servo horns are installed at
center position in factory.
Hook servos to a receiver to
check center point if
necessary.

2. Level the control surfaces,
and set rudder arms at 90
degree positions.

Installation of
Servo Link Rods

4. Push the ball joint head to
the ball head by using pliers
or hand.

3. Adjust the link rod length by
turning the ball joints to
appropriate positions.

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5. Electrify the servos to make
sure all the control surfaces
are installed in the center
positions.

Installation of
Servo Link Rods
(continued)

Installation sequence of spinner
parts:
aluminum alloy base plate →
propeller → washer → nut →
spinner → two screws.

Installation of
Spinner

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Recommended Settings of Dual Rates and

Exponentials of Control Surfaces

Lowrate Lowrateexp Highrate Highrateexp

Ailerons 60 40% 100 40%

Elevator 50 30% 100 30%

Rudder 60 30% 100 30%

Flaps 80 ~ 100 ~

ForcustomersupportintheUSA,please
contactOhioModelProductsinOhio.
Tel: +1‐614‐733‐9488 (9am‐5pm,ET)
Email: [email protected]
Website:www.OhioModelProducts.com

DisclaimerandSafety

• Thisproductisnotatoy.Itisnotrecommendedforchildrenunderage14.

• Fly the airplane by abidingbylocal lawsand rules.

• Flytheairplaneinadesignatedlocation,andalwaysmaintainvisualcontactoftheaircraft.

• Avoidflyingdirectlyoverunprotectedpeople,movingvehicles,andoccupiedstructures.

• ReadthesafecodeofAMAbeforeflight.Theguidelinecanbedownloadedfromthefollowinglink:

www.modelaircraft.org/files/100.pdf

ForcustomersupportoutsideoftheUSA,
pleasecontactOMPHobby inChina.
Tel:+86‐755‐8672‐4337
Email:[email protected]
Website:www.OMPHOBBY.com

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