GREAT PLANES YAK 55 Instruction Manual
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GREAT PLANES YAK 55 Instruction Manual

3d ep with flightflex
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Wingspan: 33.5 in [850mm]
Wing Area: 369 sq in [24 dm
Weight: 16-17 oz [455–480g]
Wing Loading: 6.2–6.6oz/sq ft [19–20 g/dm
Length: 36.5 in [925mm]
Radio: 4-channel w/ 4 micro servos and 25A brushed ESC
Power System: Ball-bearing 370-sized motor, 5:1 reduction gearbox (included)
Great Planes
®
Model Manufacturing Co. guarantees this kit to be free from defects in both material and workmanship at the date of
purchase. This warranty does not cover any component parts damaged by use or modification. In no case shall Great Planes' liability
exceed the original cost of the purchased kit. Further, Great Planes reserves the right to change or modify this warranty without notice.
In that Great Planes has no control over the final assembly or material used for final assembly, no liability shall be assumed nor
accepted for any damage resulting from the use by the user of the final user-assembled product. By the act of using the user-assembled
product, the user accepts all resulting liability.
If the buyer is not prepared to accept the liability associated with the use of this product, the buyer is advised to return this
kit immediately in new and unused condition to the place of purchase.
To make a warranty claim send the defective part or item to Hobby Services at the address below:
Include a letter stating your name, return shipping address, as much contact information as possible (daytime telephone number, fax
number, e-mail address), a detailed description of the problem and a photocopy of the purchase receipt. Upon receipt of the package
the problem will be evaluated as quickly as possible.
READ THROUGH THIS MANUAL BEFORE STARTING
CONSTRUCTION. IT CONTAINS IMPORTANT WARNINGS
AND INSTRUCTIONS CONCERNING THE ASSEMBLY
AND USE OF THIS MODEL.
© Copyright 2005
3D EP with FlightFlex

INSTRUCTION MANUAL

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WARRANTY
Hobby Services
3002 N. Apollo Dr. Suite 1
Champaign IL 61822 USA
™
Champaign, Illinois
(217) 398-8970, Ext 5
airsupport@greatplanes.com
GPMZ0181 for GPMA1274 V1.0

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Summary of Contents for GREAT PLANES YAK 55

  • Page 1: Instruction Manual

    Further, Great Planes reserves the right to change or modify this warranty without notice. In that Great Planes has no control over the final assembly or material used for final assembly, no liability shall be assumed nor accepted for any damage resulting from the use by the user of the final user-assembled product.

  • Page 2: Table Of Contents

    Adhesives and Building Supplies.........4 The EPP material that this Yak 55 is made of allows it to Optional Supplies and Tools ........4 bounce back from most crashes – just pick it up, dust it off, and launch it again.

  • Page 3: Safety Precautions

    Failure to follow all instructions could cause permanent damage to the battery and its 1. Your YAK 55 should not be considered a toy, but rather a surroundings, and cause bodily harm! sophisticated, working model that functions very much like a full- size airplane.

  • Page 4: Adhesives And Building Supplies

    Frequently you can study photos in following steps Here is a list of optional tools mentioned in the manual that to get another view of the same parts. will help you build the Great Planes Yak 55. ❏ Great Planes CG Machine (GPMR2400) ™...

  • Page 5: Kit Contents

    If any parts are missing or are not of acceptable quality, or if you need assistance with assembly, contact Product Support. When reporting defective or missing parts, use the part names exactly as they are written in the Kit Contents list. Great Planes Product Support: 3002 N Apollo Drive, Suite 1 Champaign, IL 61822 Telephone: (217) 398-8970, ext.

  • Page 6: Ordering Replacement Parts

    ORDERING REPLACEMENT PARTS Replacement parts for the Great Planes YAK 55 EP w/FlightFlex are available using the order numbers in the Replacement Parts List that follows. The fastest, most economical service can be provided by your hobby dealer or mail-order company.

  • Page 7: Building Instructions

    Use the glue-gun tip to re-melt the glue bead, causing it to BUILDING INSTRUCTIONS penetrate into the joint and form into a fillet. The gun tip will also slightly melt the foam, allowing the glue to fuse with it somewhat, forming a very strong joint. Assemble the Airframe CENTER A = A...
  • Page 8 ❏ 9. Use a hobby knife to clean any excess glue from the hinges. ❏ 6. Test fit the ailerons to the wings. If necessary, enlarge the precut hinge slots with a hobby knife. ❏ 10. Slide the 3mm [1/8"] carbon elevator joiner tube into the plastic tubes on the stabilizer.

  • Page 9: Set Up The Radio System

    Set Up the Radio System ❏ 5. Cut a slot in the left elevator half in the location shown. The front of the slot is just aft of the carbon tube. The plane is shown here upside down. ❏ 1. Secure a 6” [152mm] extension to each of your aileron servos with tape or heat-shrink tubing.
  • Page 10 ❏ ❏ 8. Press a plastic z-bend clevis into each of the four 11. Install a control horn into the right side of the rudder control horns. Trim the inside of the hole in the control horn using the same procedure. to ease the installation of the clevis.

  • Page 11: Install The Propulsion System

    servo. Slide a 3-1/8" X 1/32" [80mm x 1mm] carbon rod through Install the Propulsion System the clevises on the servo and the control horn. Adjust the linkage by sliding the rod in the clevises until you have the elevator straight when the servo is centered.

  • Page 12: Get The Model Ready To Fly

    ❏ 7. Secure the propeller to the prop saver using one of the included o-rings. ❏ 4. Test fit the prop saver against the hub of the included propeller. The proper fitting side faces forward when installed. Slide the prop saver onto the gearbox output shaft. Make sure that the screws seat down into the two flat spots on the shaft.

  • Page 13: Set The Control Throws

    If, after you have become accustomed to the way become too difficult to control. In any case, start at the the YAK 55 flies, you would like to change the throws to recommended balance point and do not at any time suit your taste, that is fine.

  • Page 14: Balance The Model Laterally

    ™ (TOPQ5700) in the does not apply to models while being flown indoors. workshop and keep a Great Planes Fingertip Prop Balancer 7) I will not operate models with pyrotechnics (any device (GPMQ5000) in our flight box. that explodes, burns, or propels a projectile of any kind).

  • Page 15: Check List

    [in the complete AMA Safety Code]. 9) Under no circumstances may a pilot or other person The YAK 55 is a great-flying model that flies smoothly and touch a powered model in flight; nor should any part of the predictably.

  • Page 16: Hand Launch

    (anticipating rudder corrections that will be required to Take it easy with the Great Planes Yak 55 for the first few flights, maintain heading), remember to throttle back at the top, and gradually getting acquainted with it as you gain confidence.

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