RULES FOR NORTHWEST SUPER SPORT RACE
1. Purpose: It is the intent that this event will serve as an
intermediate racing class between Northwest Sport Race and the AMA racing
2. All pertinent rules from the AMA control-line racing unified rules
section shall apply in regard to safety and the conduct of races, except
3.1 The "engine" is defined as the complete unit, ready
to run, needing only prop, fuel and starting voltage, except that the glow
plug, venturi and/or restrictor and spraybar and needle valve, gaskets,
bolts, drive washer, front washer, prop nut, shims, piston ring(s) (if used),
and ball bearings (if used) need not be considered part of the production
unit. These parts are not subject to the rules regarding quantity or source.
3.2. No tuned pipes or exhaust extensions are allowed except bona
fide mufflers which do not increase engine performance. Engines shall operate
on suction feed. No variable or in-flight adjusting carburetors are allowed;
however, any other modification of the intake is permissible except as noted
3.3. Two types of engines will be allowed:
3.3.1. Engines of .36 c.i.d. maximum with single bypass intake
port. These engines shall not be restricted in regard to venturi dimension.
There is also no restriction regarding engine rework, except that all major
components shall be produced by the original manufacturer. No material or
part may be added.
3.3.2 (a). Engines of maximum total nominal displacement of 0.4020
cubic inches (6.6 cc). Engines must be production units assembled from factory
available production parts. Engines and parts, with the exception of the
venturi-spraybar assembly, must have been produced in quantities greater
than 500, and all must be available through normal retail outlets in the
U.S.A. Parts substitution shall be limited to catalog listed parts produced
in quantities greater than 500 units for the engine being altered and available
commercially to anyone from the manufacturer of the engine. Engines may
only be modified by removing parts or material from parts. No material or
part may be added.
3.3.2 (b). The engine must be of the front-intake, single-bypass
configuration. All air for the combustion process must come through the
crankshaft. Altering nominal subport induction, timed holes in the case
and the sleeve, or other techniques to circumvent the requirement that all
air come through the specified venturi opening, are prohibited.
3.3.2 (c). No ABC or AAC piston/sleeve configurations are allowed.
3.3.2 (d). Each engine shall be equipped with a venturi and spraybar
meeting the following restrictions: The venturi shall have an inside circular
bore of not more than 0.315 inch. The venturi will maintain this diameter
for at least 0.25 inch above and below the spraybar centerline. The spraybar
assembly will be located precisely through the centerline of the venturi
bore and shall have a circular cross section of diameter not less than 0.155
inch for the portion in the throat of the venturi. Exception: R/C carburetors
may be used with the opening fixed in one position.
3.3.2 (e). The complete engine/venturi/spraybar system shall weigh
less than 10.5 ounces (excluding muffler).
4. Aircraft: The model shall conform to the AMA slow rat specifications:
"Models must be of profile fuselage type, and must conform to the
general profile definition. The model must have a minimum fuselage length
of 24" when measured from the propeller thrust washer face to the leading
edge of the movable elevator surface.
"The minimum wing area shall be 300 square inches. The wing must
have a minimum thickness of one inch when measured at any point along the
span, with the exception of the last two inches before each wing tip.
"All models must have a canopy, horizontal stabilizer, elevator
and vertical fin Models must have a fixed landing gear with a minimum of
5. Fuel tank: The fuel tank shall be fully external and forward
of the wing leading edge, and located on the outboard side of the fuselage.
The tank may not be designed so as to cowl the engine. The tank may not
be pressurized, but the vents may be directed forward into the airstream.
6. Pull test: The plane and entire control system shall undergo
pull test of 35 pounds.
7. Lines: The minimum diameter of lines shall be .018". Lines
shall be of the stranded type, with a length of 60 feet measured from the
handle grip to the fuselage, plus or minus 6" tolerance.
8. Races: Preliminary heats shall be of 70 laps duration, with
one pit stop minimum required. The final or feature race(s) shall be of
140 laps duration, with three pit stops minimum required. All races shall
be flown with at least two entrants, and not more than three entrants. At
contests where entrants fly preliminary heats to determine finalists, at
least three entries shall proceed to the final race(s). The decision on
the number of finalist entrants shall be made by the event director and
be made before the start of any preliminary heats.
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
E-mail for more information
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