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07 03 11  08:26  - F5J goes FAI II.

Some time has passed since proposed rule text was submitted to FAI and first impressions are already rolling in. First, a quick summary of the proposal:

• Same as F3J: competition format, groups, timing, re-flights, most of the scoring
  
• Landing bonus is only 50 points out to 10m
  New term "launch height" is introduced, defined as maximum height reached by model from motor start to 10s after motor stop
  
• Launch height is used as a score penalty: the higher you start from, less points you achieve. This scale is nonlinear: half point is subtracted from score for each m up to 200m, above 200m 3 points are subtracted
  
• To simplify implementation of this in the hardware, only one motor start is allowed; after that, your reciever (and with it, limiter) must be power cycled
  
• 
  

What we created here is basically F3J without a winch, with "time on the line" replaced by "launch height". It really was the only option as long as people insisted on timing duration of flight as a measure of one's success.

By now we have first devices available that enable us to organize such competition:
(more)

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