RULES FOR NORTHWEST 80MPH COMBAT
1. PURPOSE: It is the intent that this event will provide a form
of combat that is slower, more relaxed, and less destructive to equipment
than all-out AMA combat events.
2. All rules for AMA (fast) combat shall apply except as follows:
3. ENGINES: Any engine up to .40 displacement is permitted.
4. SPEED LIMIT: The airspeed limit for all contestants shall be
80 mph, which is defined at 6.43 seconds for a two-lap period at 20-foot
height. No devices capable of varying the speed of the airplane in flight,
such as throttles or carburetors adjusted by elevator trim, are allowed.
5. MATCH PROCEDURE: Flying of matches shall be exactly the same
as in AMA combat except as follows:
The first airplane to launch will be timed for two laps after the first
full lap, at a height of approximately 20 feet (brief deviations in height
for safety reasons are permitted). If the time for those two laps is greater
than 6.43 seconds, the airplane will be judged eligible to compete. Pilots
must keep the plane near the 20-foot height; failure to do so will delay
If the second airplane launched appears to the circle marshal to be slower
than the first plane, after the first plane has been declared eligible,
the circle marshal may waive the timing of the second plane and signal the
start of combat. If the second plane appears equal to or faster than the
first plane, the circle marshal may time the second plane as well before
In the case of a simultaneous launch, the faster airplane will be timed.
Airplanes will not be timed on successive launches in the same match, unless
the circle marshal has reason to believe that a plane has passed the 80mph
speed limit. The circle marshal retains the right to stop combat at any
point and re-time any airplane that appears to have passed the 80mph speed
Exceeding the speed limit:
If, on the initial launch, a plane is judged to be flying in excess
of the 80mph speed limit, that plane's airtime watch will be cleared, and
airtime will not be counted until the plane is judged to be consistently
flying below the airspeed limit; combat will not be started until both airplanes
are within the speed limit. If a plane is judged to exceed the limit at
sometime during the match - after the initial timing - the airtime watch
will be stopped and not restarted until the plane is judged to be consistently
flying below the speed limit; combat will be stopped until both planes are
below the speed limit.
6. SCORING: Per AMA Combat.
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
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