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View Full Version : Primer LMR Sailplane events


Jason T
09-13-2006, 11:55 AM
Ron (Sky Sharkster) had a great suggestion about posting an LMR primer. So here it is. :)

The LMR stands for Limited Motor Run and is a Sailplane style of flying usually flown as an event or contest. LMR has 3 parts: 1) The motor run time, 2) Thermal duration (trying to stay up for an allotted time and 3) spot landing. The basic idea is that you have a limited amount of time to run your motor to climb as high as possible before you have to shut off the motor. Then you try to keep your model up for the allotted amount of time. Last, you try to land as close as possible to a certain target and earn points based on proximity to the target.

There are several AMA events for LMR and they are detailed. The info was provided courtesy of Ric Vaughn, president of NEAC (National Electric Aircraft Council) (http://www.electricaircraft.org/index.htm).

AMA events (Note: The new rules allow for any battery chemistry.)

1/2 A Sailplane:
Battery voltage allowed: 8.4 volts,
Motor allowed: Can speed 400 motor,
90 sec motor run,
8-12 min flight. This is typically decided by the CD (contest director)
10/20 point landing (10 points for landing within 20 feet of the target and 20 points for landing within 10 feet of the target),
10/20 foot radius landing zones.Class A Sailplane:
Battery voltage allowed: 8.4 volts,
45 sec motor run,
8-12 min flight,
10/20 point landing,
10/20 foot radius.Class B Sailplane:
Battery voltage allowed: Up to 42 volts,
30 sec motor run,
8-12 min flight,
10/20 point landing,
10/20 foot radius.Class A Oldtimer:
Motor voltage allowed: 8.4 volts
Model allowed: Plane built and flown in competition 1941 or before and model can only have rudder and elevator,
60 sec motor run,
8-12 min flight,
10/20 point landing,
10/20 foot radius.Class B Oldtimer:
Up to 42 volts,
45 sec motor run,
8-12 min flight,
10/20 point landing,
10/20 foot radius.NEAC Sportsailplane:
Battery allowed: Up to 42 volts,
Model allowed: No greater than 100" wingspan,
2 min motor window,
10 min flight,
10 pt landing in 20 foot radius spot.