da Rock

Thanks for your comments.

The djaerotech article is very interestion altho I would classify it more as assertions than scientific proof. It considers a number of possibilities none of which are exactly the question I have posed. However the general trend of it seem to support my case.

He argues mainly about energy and where it goes. It seems to me that, if you keep your engine running, you must generate some power, so where does it go if not in a faster glide.

However, I have put my exact question to them and eagerly await the answer.

david