1. All Academy of Model Aeronautics rules from the control line general and control line speed sections shall apply, except as follows:
2.1. Any design configuration and construction method is permissible so long as the contest management considers the model to be safe and sound.
2.2. The engine and engine mounts shall receive a 40 pound pull test.
2.3. The control system must be mounted external to the normal aircraft contours. This includes the bellcrank, leadouts or control lines, pushrod, and elevator horn. No more than one inch of the leadouts or control lines can be enclosed by the leadout guides.
2.4. The maximum weight of the aircraft in ready-to-fly condition, including fuel shall be 45 ounces.
3. LINES & PULL TEST:
3.1. The model must be flown on two single strand steel control lines of .020 minimum diameter. The distance between the centerline of the fuselage and the center of the control handle grip shall be a minimum of 65 feet.
3.2. The model and entire control system, lines and handle shall receive a 40 G pull test.
4.1. The allowed jet engines are the Dyna-Jet, Bailey Sport Jet, and the O.S. II.
4.2. It is required that the engine shall be in stock condition internally. No material may be removed or added to the engine, except as follows:
4.2a. Engine head: Part or all of the head fins may be removed. Holes may be drilled into the head for purposes of engine mounting. Valve face may be lapped as needed for routine maintenance. Engine cowling is permitted, but the front of the cowl must be behind the intake throat.
4.2b. Flowjector: Fuel feed holes may be drilled out to larger size, or filled and redrilled. (holes allowed in original location only). A short piece of metal tubing may be installed into the tire pump connection to facilitate quick removal of the air supply hose. Alternatively, the threads on the tire pump connection may be filed off, or filled in so as to make a smooth surface to facilitate quick removal of the air supply hose.
4.2c. Metering jet: Any metering jet may be used, and may be located anywhere between the tank and the flowjector.
4.2d. Tailpipe: A stock tailpipe with ignition plug in place must be used. (starting ignition may be by means of a starting probe). Repaired tailpipes are permissible, provided stock dimensions have been faithfully adhered to. The front surface of the tailpipe (combustion chamber screw ring) and the lock ring may be lapped.
4.2e. Reed valve: Any commercially available valve may be used.
4.3. Interchanging of parts between the above listed engines is permissible.
4.4. Fuel delivery to the engine shall be by suction, no pressure feed is allowed.
5.1. Fuel used shall be the AMA formula: 80% methanol & 20% nitromethane.
6.1. Timing will be for 6 laps. Speed calculation is: V = 1670.76 divided by seconds.
6.2. All other general rules for control line speed flying (attempts, number of models, competition flying from pylon, timing of flights, etc.) shall be applicable.
6.3. Builder of the model rule does not apply to this event.
6.4. Entrant of the model shall either be the pilot, or shall start the engine.
Northwest rules are coordinated and sponsored by Flying Lines, the independent voice of Northwest control-line model aviation. Suggested donation is $5 per year.
2456 Quince St.
Eugene, OR 97404