Airplane design requirements:

1. Wing area:
A. Conventional designs: 400 square-inch minimum wing area, and a separate, aft–mounted horizontal stabilizer of 40 square-inch minimum area that provides the sole control of pitch attitude.
B. Tail-less designs (flying wings, including deltas): 450 square-inch minimum wing area.
C. Canard designs: total wing area (forward wing and aft wing combined) must be at least 400 square-inches. Forward wing must have a minimum 40 square-inch area and provide sole control of pitch attitude.
D. Other configurations may be acceptable, but must be approved prior to racing.

2. Minimum wing span: 36 inches for all designs.

3. Engine: Limited to readily available .15 cubic inch displacement plain bearing glow plug motors. The standard muffler as provided by the engine’s manufacturer must be used in its entirety. All factory-installed baffles must be used. No modifications are allowed to the motor or muffler except that bolts and screws may be replaced. Engine must be readily available at normal retail hobby outlets. All motors must have a spinner or rounded prop nut installed while racing (not required for pusher motor designs). Multi-engine designs are not allowed. Exhaust extensions may be used.

4. Propellers used in this event must be readily available to all competitors. Retail cost of a propeller may not exceed $10.00.

5. Contestants must use the organizer-provided fuels during races.

6. All models entered are subject to a general safety inspection before competing and all models must have been test flown prior to racing.