Spotted this unintentional(?) plug for gliding on the main RV homebuilt
site:

http://www.vansairforce.com/communit...ad.php?t=45291

The poster is the Lead Flight Director, Space Shuttle Operations. Doubt
that many RV builders will suddenly be tearing the engines out of their RVs
(such stubby wings!) but thought it a mildly unusual place to find a plug
for adding a glider rating.