On Wednesday, 20 April 2016 05:14:36 UTC-6, wrote:
So, slightly off topic maybe, but I was just wondering... if a motor glider starts his engine and motors home to land back at the home airport, why does that accrue the 25 point 'airfield bonus' (AB) in the scores?
Just curious...

Bob 7U

2016 SSA rule book (Nationals) states

10.10.3.4 A pilot of a motorized sailplane who uses the motor before landing can be eligible for a bonus, under the following provisions:

10.10.3.4.1 The flight log shows that the motor was started within two (2) miles of an eligible airfield (Rule 10.10.3.2) and at least 1000' above that airfield's elevation. Distance from airfield to be determined based on the FAA official airport coordinates or by the CD.