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S140131                                                                                             Mentor-G V3  

M E N T O R - G   V 3   A R F  

20~30cc GAS ENGINE POWERED R/C TRAINER 

I N S T R U C T I O N   M A N U A L

 

The M

ENTOR

-G V3 is a multi-functional RC trainer 

suited for RC pilots who want to use a fuel-efficient 
gas-powered engine. Some of the setup options 
include: 

 

Basic trainer. 

 

Aerobatic trainer. 

 

Large-size float-plane trainer. 

 

Glider or banner tow-plane. 

 

Load-carrying platform for video 
camera(s) or for dropping candy at fun-
flys, etc.. 

We invite you to enjoy the joy of flying this  
balsa and light-ply almost-ready-to-fly aircraft. 

TABLE OF CONTENTS 

  I.  Important safety precautions ……………………. 1

 VI. 

Assembly instructions ……………………….. 4

 II.   Warranty, liability waiver, and return policy …… 2

VII.  Floats installation and setup …………………. 9

III.   Specifications …………………………………… 3

VIII.  Setup and adjustments ……………………….. 9

IV.  Features of V3 …………………………………... 3

 IX. 

Preparation for transport and field setup …… 10

 V.   Parts list …………………………………………. 3

  X. 

Preflight checks …………………………….. 10

I.  IMPORTANT SAFETY PRECAUTIONS TO PROTECT YOUR MODEL, YOURSELF & OTHERS 

1.

 

This product should not be considered a toy, but rather a sophisticated, working model that functions much like a 
full-scale airplane. Because of its performance capabilities, this product, if not assembled and operated correctly, 
could cause injury to you or spectators and damage to property. Maxford USA provides you with a high-quality, 
thoroughly tested model airplane kit with assembly instructions. However, the quality and capabilities of your 
finished model airplane depend on how you build it, and your safety depends on how you use and fly it. Any 
testing or flying of this model airplane is done entirely at your own risk. 

2.

 

Assemble the model airplane according to these instructions. We recommend that you do not alter or modify the 
model beyond the assembly options covered in these instructions, as doing so may result in an unsafe or 
unworkable model. In a few cases the instructions may differ slightly from the photos; in those instances the 
written instructions should be considered as correct. If you have any question or concern about these instructions, 
before you proceed with assembly of this product, contact us at (562) 529-3988, Monday through Friday, except 
national holidays, between 9 AM to 5 PM Pacific time. 

3.

 

It is your responsibility to install the R/C system and other components in such a way that this model airplane 
passes all applicable safety/range tests and that the power system and controls operate smoothly and correctly. 

4.

 

Recheck the operation of this model airplane before every flight to ensure that all equipment is still operating 
correctly and that the model has remained structurally sound. Also, before every flight check all clevises and 
other connectors; do not fly without replacing any that you find damaged or defective. 

Page 1 of 10 

Summary of Contents for Mentor-G V3

Page 1: ...h a high quality thoroughly tested model airplane kit with assembly instructions However the quality and capabilities of your finished model airplane depend on how you build it and your safety depends on how you use and fly it Any testing or flying of this model airplane is done entirely at your own risk 2 Assemble the model airplane according to these instructions We recommend that you do not alt...

Page 2: ...r suit you will not sue Maxford USA or any of its representatives If you do not fully accept the above liability and waiver you may request a return merchandise authorization number RMA as explained in item 2 below If you think there is a missing part or any shipping damage please read our after sales service and return policy as outlined below 1 Inspect your order upon delivery for any shipping d...

Page 3: ...main landing gear struts in the alternate predrilled holes add an extra layer of plywood some blind nuts a nose wheel a nose wheel steering servo and related linkages these optional items are not included V PARTS LIST 1 Items you must supply to complete the MENTOR G 5 minute epoxy glues Cyanoacrylate CA adhesives masking tape a high speed rotary tool and a few common hand tools such as long nosed ...

Page 4: ...r of the fuselage so the tail wheel s wire strut aligns at the centers of the aft ends of both the vertical stabilizer and the fuselage Measure 3 4 inch from the top end of the tail wheel s wire strut and bend the strut back toward the rear of the airplane at a 90 degree angle Attach the tail wheel assembly to the bottom of the fuselage with two approx 9 16 inch 15 mm long wood screws Apply thin C...

Page 5: ...e bottom of the fuselage b If you convert the landing gear to a tricycle configuration you may use scrap plywood to reinforce the more aft mounting position of the main landing gear on the bottom of the fuselage and you may use a spare opening in the servo tray for your nose wheel steering servo 10 Position the pushrod openings in the control horns directly over the hinge lines and drill holes in ...

Page 6: ...m a Z bend in one end of the 13 inch long throttle pushrod Insert the pushrod almost fully through its opening in the firewall leaving approx two or three inches exposed in front of the firewall 20 Select a servo control arm for your throttle servo that will provide enough pushrod travel to go from full throttle to just below idle i e throttle cut off Ream the hole in the throttle servo s control ...

Page 7: ...all engine connections As you bring the engine toward the firewall your first connection should be the throttle pushrod s Z bend then secure the four sets of mounting bolts and standoffs and apply Lock Tite or a similar thread locking compound NOTE EZ Link connectors may be used but are not included 32 Route the high voltage wire along the engine s left side between the cylinder head and muffler r...

Page 8: ...e plywood wing hold down plate then into and through the hold down holes in the wing 40 With the wing squarely aligned in the wing saddle drive these bolts firmly but not so tight that wood becomes crushed into the fuselage mounted blind nuts at the rear of the wing saddle Then carefully lift the airplane and lay it on its back on a soft surface 41 We recommend you add a short length of rubber tub...

Page 9: ... the cable housing to the aft end of the right side float then use 2 piece plastic clamps and a nylon wire tie to secure the cable s position VIII SETUP AND ADJUSTMENTS 1 For initial flights set the MENTOR G V3 s center of gravity CG at approx 3 3 4 inches back from the leading edge of the wing If necessary move the batteries and or add weight to the nose or tail to ensure the CG is correct Hint O...

Page 10: ...nnect both aileron servos and to snugly reattach but not over tighten the wing hold down screws into the blind nuts inside the fuselage X PRE FLIGHT CHECKS 1 Double check the security of the engine and make certain that all screws linkages clevises and other connections throughout the air frame are secure 2 Double check the control directions of the throttle ailerons elevator and rudder 3 As with ...

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