Northwest Flying Clown Race Rules
1. Purpose: This event is intented for all fliers and pit crews interested in a simple racing event which uses a common aircraft, emphasizing both speed and economy, and encourages the use of a wide variety of engines. All AMA controlline unified racing rules apply, except as follows:
2. Airplanes and the entire control system shall undergo a pull test of 25 pounds. Lines are .015 stranded steel. Length is 52 feet, plus or minus 6 inches, measured from the center of the handle to the fuselage.
3. Engine: Any design or make of piston engine is allowed, except that the maximum engine displacement is limited to .19 cubic inches. Modifications are not restricted within the limits of the AMA safety code.
4. Fuel tank: Any design of fuel tank is allowed, including pressure systems, except as follows:
4.1. Fuel capacity is restricted to 1 ounce, with a +5% tolerance, 31cc maximum.
4.2. The fuel tank shall be fully external of the plane, on the outboard side of the fuselage, and entirely in front of the leading edge.
4.3. All tank vents are limited to a maximum size of 1/8" outside diameter. A spring-loaded pinchoff device capping the overflow vent on a uniflow tank is permitted.
5. Fuel: Glow fuel shall contain a maximum of 10% nitromethane with 20% lubricant and the rest methanol. Glow fuel will be supplied by the contest management. Diesal engines may use diesel fuel.
6. Aircraft: The only aircraft allowed is the PDQ Flying Clown or faithful replica. Changes to the planform, profile, or wing thickness are prohibited. Cheek cowls are prohibited. Wheels must be at least 1" in diameter, and be spaced laterally about 7".
7. Prohibited equipment: Hot glooves electrical contact systems, fast-fill setups and fuel shutoffs are prohibited. Shutoffs may be installed on the plane for test-flying, but must be bypassed during races.
8. Races: All preliminary heats and the final race will be timed for 15 minutes from start to finish. The contestant with the most laps wins. Preliminary heats may be 7-1/2 minutes if agreed to by a mojority of contestants or required by contest time constraints. Records shall not be established for heats less than 15 minutes. There shall be either two or three pilots in heat races. At least three aircraft shall advance to the feature race. The decision on the number of feature entries shall be made by the event director in advance before the start of any preliminary heats. If more than three planes advance to the feature, races will involve at least two and no more than three airplanes.
Northwest Regionals Rules coordinated and sponsored by Flying Lines, 2456 Quince St., Eugene, OR 97404