Todd, I think we are all in agreement that a motor glider is a powered
aircraft. The area that needs to be interpreted is whether a pilot
with a glider rating (there is no FAA motor glider rating) has a rating
for a powered aircraft. If that pilot does, then do all glider pilots
have a rating for powered aircraft? If not, then is the authorization
by grandfathering or endorsement to be considered a rating. (I am
qualified to fly tail wheel airplanes but I don't have a tail wheel
rating because there isn't one.) I hope Greg will post the answer is he
ever gets one.

To answer 5Z - I don't think there is any doubt that an airship is a
powered aircraft so yes, a pilot with glider and an airship ratings
would meet the letter of 61.69.

Andy