League of
Silent Flight

Please read all rules, changes from 2006:

• Added the small outrunner class of motors
• Movement of brushed car motors to the cobalt class of motors.

1. Any electric powered sailplane can enter this contest.

2. There will be three (3) 10 minute flights. One (1) point per second of flight time is scored with one (1) point deducted for each second over the 10 minute flight time. Maximum points possible = 600. (Round to the closest second for your flight time)


3. Motor run time is unlimited but is subtracted from the flight time.


4. Landing points are measured from the center of the landing circle to the closest part of the plane. For each meter from the point, subtract 3 points from the maximum of 30 pts.

Distance from Center	Landing Points
Within 1 meter	30
1-2 meters	27
2-3 meters	24
3-4 meters	21
4-5 meters	18
5-6 meters	15
6-7 meters	12
7-8 meters	9
8-9 meters	6
9-10 meters	3
Over 10 meters	0

5. Motor handicap: See table below. Multiply the actual motor run rounded to the closest second by the handicap percentage. Round this calculated value to the closest 1/10th of a second.

Motor Type	Handicap
Brushless	95%
Cobalt or brushed car motors	75%
Outrunners with bell diameter 28 mm or less and a length of 17 mm	68%
Ferrite	45%
Speed 400	30%

6. You may restart your motor as many times as needed, but on the second motor start you may not add any landing points. A second way of stating this rule: If you start your motor after the initial launch run of the motor, you will not receive any landing points.

7. Any type of rechargeable battery cell is legal (Lipo, Nicad, NiMh).

8. Rounds will be flown Man-on-Man (MoM).