Club 40 Rules - www.Club40Racing.com
Airframes
* The World Models Sky Raider Mach II ARF per instructions
* The World Models LA Racer 40 ARF per instructions
Airframe Regulations
* Recovering plane is allowed
* No airframe modifications other than repairs or reinforcement.
* Standard size servos or mini servos with 4 screws are required.
* Dual aileron servos are allowed.
* Minimum ready to fly weight is 4 pounds and 8 ounces. 4 pounds and 4 ounces for Novice
class.
Propulsion System Regulations
* All engines must be stock. Including carburetor and muffler supplied by the manufacturer.
* Baffles, if supplied, must be in the muffler.
* Any size of prop may be used.
* Props shall be unmodified and commercially available. Balancing only will be allowed as defined in AMA pylon regulations for class 424, rule 7.5.2 which is incorporated by reference.
* Bubbleless tanks are allowed.
* Contest Director's option - 15% Nitro provided by and advertised by race organizer.
Advanced Class Engines
Recommended
* Thunder Tiger Pro .40 BB ABC w/Muffler
Acceptable Alternatives
* SuperTigre GS-40 Ringed w/Silent Muffler
* GMS .40 ABC BB w/Muffler
* GMS .40 ABC BB Remote Needle Valve w/Muffler
* Evolution .40NT w/Muffler
Sport/Novice Class Engines
* Thunder Tiger GP 42 ABC w/Muffler
* O.S. .46 LA Non-Ringed w/Muffler
* O.S. .40 LA
* O.S. .40 FP
Airframe Criteria
* Must be able to taxi easily. Steerable tailwheel is required.
* Must have upright engine with exposed cylinder and muffler.
* Minimum wing area of 550 sq inches and 53" wingspan.
* Wing must be held on with screws.
* Must have a canopy similar in size and shape to originally provided canopy.
Governing AMA Prop Specification
From the AMA R/C Pylon Racing Rules:
7.5.2. In events requiring stock, commercially available propellers, the following modifications may be made without penalty:
a. One blade may be sanded on the top (front) side only for balancing.
b. One side of the hub may be sanded for balancing.
c. The shaft hole may be enlarged, but only as much as necessary to fit the engine crankshaft. The enlarged hole shall be concentric with the original hole.
d. Edges and tips may be sanded, but only as much as necessary to remove sharp molding flash.