E-flite J-3 Cub 25 ARF User Manual

J-3 Cub 25 ARF

Assembly Manual

Table of Contents

Introduction

Introduction ................................................................2

Contents of Kit/Parts Layout

Specifications .............................................................3

Covering Colors Required Electronics & Accessories Outrunner (Direct Drive) Motor Setup Required Tools and Adhesives Optional Accessories

Warning ....................................................................5

Before Starting Assembly Note on Lithium Polymer Batteries Using the Manual Limited Warranty Period Landing Gear Installation Motor and Cowling Installation Radio Installation Wing Assembly Tail Installation Linkage Installation Final Assembly Center of Gravity / Battery Installation Control Throws Flying Notes 2006 Official AMA National Model Aircraft Safety Code

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The Piper J-3 Cub is an all-time favorite among aviation enthusiasts everywhere. Classic lines and predictable ﬂight performance are just a few of the Cub’s trademarks. The 25-size J-3 Cub from E-ﬂite™ is the ﬁrst of its size for E-ﬂite. The name Piper J-3 Cub .25 ARF implies the power of a .25 glow engine, but it is designed speciﬁcally for electric operation. This aircraft has been designed from the start for the E-ﬂite Power 25 Outrunner BL motor. It uses balsa and plywood construction and is covered with genuine UltraCote®. Using a scale of approximately 1/7, the J-3 Cub spans 62 inches delivering excellent presentation and performance to budget-minded pilots.

You can ﬂy with either a 10-cell Ni-MH battery, or a 3-cell Li-Po for increased performance and duration. An optional set of scale ﬁberglass ﬂoats is also available (EFLA500). All it takes is ﬁve minutes to change from landing gear to ﬂoats to enjoy those afternoons on the lake. Change back to the standard landing gear and you can be shooting touch-and-go’s at the local ﬂying ﬁeld, the choice is yours. Either way we believe you will fall in love with the relaxing ﬂight performance of the E-ﬂite J-3 Cub.

Specifications

Covering Colors

Wingspan: 62 in (1575mm) Length: 35.5 in (900mm) Wing Area: 552 sq in (35.5 sq dm) Weight w/o Battery: 3.2 lb (1.45 kg)

4.5 lb w/Floats (2.0 kg)

Weight w/Battery: 4 lb (1.8 kg)

5.3 lb w/Floats (2.4 kg)

Contents of Kit/Parts Layout

Large Replacement Parts:

EFL4001 Wing w/Ailerons EFL4002 Fuselage EFL4003 Tail Set EFL4004 Landing Gear EFL4005 Cowling EFL4009 Tailwheel Assembly

Small Replacement Parts:

EFL4006 Windshield/Window Set EFL4007 Pushrod Set EFL4008 Main Wheels

Cub Yellow HANU884 Black HANU874

Required Electronics & Accessories

Required Tools and Adhesives

Complete Radio System

JSP16000** JR SPORT™ 6-Channel Radio System

Or Purchase Separately

JSP30600 RS600 6-Channel Receiver w/o Crystal JRPXFR** FM Receiver Crystal JSP20040 MN48 Mini Servo (4) JSP98020 6" Y-Harness JSP98110 6" Servo Extension (2) JRPA212 Long Servo Arm (2)

Outrunner Motor Setup

EFLA4025A Power 25 BL Outrunner Motor, 870Kv EFLA312B 40-Amp Brushless Speed Control APC12060E Electric Propeller, 12 x 6E THP42003S2PPL 4200 3S2P, 11.1V Li-Po, 13 GA EFLC3005 Celectra™ 1–3 Cell Li-Po Charger

EFLB4010 1800mAh Ni-MH, 10-Cell

Tools

Small Phillips Screwdriver (EFLA257 - included with EFLA250) Hex Wrench: 7/64" (EFLA251 - included with EFLA250)

Drill T-pins Ruler Felt-tipped pen String Square Tape Pliers Hobby scissors Side cutters Sandpaper Rubbing alcohol Paper towel/tissue Masking tape Petroleum jelly Hobby knife Drill bit: 1/16" (1.5mm), 5/64" (2mm),

3/32" (2.5mm), 1/8" (3mm)

Adhesives

Thin CA 6-Minute Epoxy (HAN8000) Medium CA 30-Minute Epoxy (HAN8002) Canopy glue Threadlock

Optional Accessories

Note on Lithium Polymer Batteries

EFLA110 Power Meter EFLA500 Float Set, 25-Size

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.

Before Starting Assembly

Before beginning the assembly of your J-3 Cub, remove each part from its bag for inspection. Closely inspect the fuselage, wing panels, rudder and stabilizer for damage. If you ﬁnd any damaged or missing parts, contact the place of purchase.

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.

Using the Manual

This manual is divided into sections to help make assembly easier to understand, and to provide breaks between each major section.

Remember to take your time and follow the directions.

Limited Warranty Period

Horizon Hobby, Inc. guarantees this product to be free from defects in both material and workmanship at the date of purchase.

Limited Warranty & Limits of Liability

Pursuant to this Limited Warranty, Horizon Hobby, Inc. will, at its option, (i) repair or (ii) replace, any product determined by Horizon Hobby, Inc. to be defective. In the event of a defect, these are your exclusive remedies.

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 an authorized Horizon Hobby, Inc. service center. This warranty is limited to the original purchaser and is not transferable. In no case shall Horizon Hobby’s liability exceed the original cost of the purchased product and will not cover consequential, incidental or collateral damage. Horizon Hobby, Inc. 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 Hobby, Inc. Further, Horizon Hobby reserves the right to change or modify this warranty without notice.

REPAIR OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE EXCLUSIVE REMEDY OF THE CONSUMER. HORIZON HOBBY, INC. SHALL NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES.

As Horizon Hobby, Inc. 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.

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.

Questions, Assistance, and Repairs

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 Hobby, Inc. directly. This will enable Horizon to better answer your questions and service you in the event that you may need any assistance.

Questions or 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 your 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 Hobby, Inc. is not responsible for merchandise until it arrives and is accepted at our facility. Include your complete name, address, phone number where you can be reached during business days, RMA number, and a brief summary of the problem. Be sure your name, address, and RMA number are clearly written on the shipping carton.

Warranty Inspection and Repairs

To receive warranty service, you must include your original sales receipt verifying the proof-of-purchase date. Providing 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.

Non-Warranty Repairs

Should your repair not be covered by warranty and the expense exceeds 50% of the retail purchase cost, you will be provided with an estimate advising you of your options. You will be billed for any return freight for non-warranty repairs. Please advise us of your preferred method of payment. Horizon Hobby 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.

Electronics and engines requiring inspection or repair should be shipped to the following address (freight prepaid):

Horizon Service Center

4105 Fieldstone Road

Champaign, Illinois 61822

All other products requiring inspection or repair should be shipped to the following address (freight prepaid):

Horizon Product Support

4105 Fieldstone Road

Champaign, Illinois 61822

Landing Gear Installation

Required Parts

• Fuselage • Landing gear

• Hub cap (2) • Tie wrap (6)

• Inner wheel hub (2) • Outer wheel hub (2)

• 4mm wheel collar (2) • 3mm setscrew (2)

• Landing gear strap (4)

• Landing gear fairing (2)

• 2

" (63mm) foam wheel (2)

• 2mm x 15mm sheet metal screw (8)

• 2mm x 10mm sheet metal screw (8)

Required Tools and Adhesives

• Phillips screwdriver • Hex wrench (included in kit)

• Side cutter

Note: The fuselage is designed to accept either the standard landing gear or optional floats. Changing from landing gear to floats requires less than 5 minutes. Refer to the manual included with your floats for proper installation.

 1. Place the landing gear in position with the larger

diameter wire to the front of the fuselage. Secure the gear using four landing gear straps and eight 2mm x 10mm sheet metal screws.

  2. Slide the inner wheel hub onto the landing

gear. (The holes in the inner hub do not go through the hub.) Slide a 4mm wheel collar onto the landing gear and secure it using a 3mm setscrew. Use threadlock when tightening the setscrew onto the flat spot of the landing gear.

  3. Press the 2

" (63mm) foam wheel onto

the inner hub. Press the outer wheel hub into the wheel. Complete the assembly using four 2mm x 15mm sheet metal screws.

  4. Press the hub cap into the outer wheel hub.

  5. Attach the landing gear fairing to the landing

gear using three tie straps. Trim the excess strap side cutters.

 6. Repeat Steps 2 through 5 to complete the landing

gear installation.

Motor and Cowling Installation

Required Parts

• Fuselage

• Cowling

• Hook and loop straps (2)

• 6-32 x 1/2" socket head screw (4)

• 2mm x 10mm sheet metal screw (4)

• Propeller adapter

• 12 x 6 electric propeller (APC12060E)

• Brushless outrunner motor

• Electronic speed control

• Battery

Required Tools and Adhesives

• Hex wrench: 7/64"

• Drill

• Drill bit: 1/16" (1.5mm), 1/8" (3mm)

Note: It is very important to be sure the propeller is balanced before installing it onto the motor.

 1. Prepare the outrunner motor by attaching the

X-mount to the motor using screws supplied with the motor.

 2. Attach the motor to the firewall using four

6-32 x 1/2" socket head screws included with the J-3 Cub.

 3. Attach the motor to the speed control. Secure

the speed control in the fuselage using hook and loop material so it will not move during flight.

Note: The firewall has been prepared to mount the E-flite™ Power 25 brushless motor. It may be necessary to remove the blind nuts and drill new mounting holes for other motor choices.

Note: Ensure you mount the speed control with the label towards the fuselage sidewall. This will assure maximum cooling for the speed control.

 4. Use hook and loop material to secure the battery

into the fuselage.

Note: Now would be a good time to plug the speed control into the receiver and check the operation of the motor. It should rotate counterclockwise when viewed from the front of the fuselage. Once the operation of the motor has been checked, unplug the battery and attach the battery hatch.

 5. Slide the cowling onto the fuselage. Place the

propeller adapter onto the motor and attach the propeller using the adapter.

 6. Position the cowling so it lines up with the

propeller and adapter. Allow for 1/8” (3mm) clearance between the propeller and cowl. Drill four 1/16" (1.5mm) holes for the cowl mounting screws. Enlarge the holes in the cowling only using a 1/8" (3mm) drill bit. Secure the cowling using four 2mm x 10mm sheet metal screws.

Radio Installation

Required Parts

• Fuselage

• Receiver

• Mini Servo (2)

• 6" Y-harness

Required Tools and Adhesives

• Drill • Drill bit: 1/16" (1.5mm)

 1. Install the servo grommets and brass eyelets

on the rudder and elevator servos following the instructions provided with the servos or radio system.

Note: The servo openings in the fuselage are set up for the JR SPORT® (MN48) Mini Servos.

 2. Center the servo in the servo opening. Use a

1/16" (1.5mm) drill bit to drill the locations for the servo mounting screws.

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