On 19 Mar, 19:41, Jim Logajan wrote:
The Real Doctor wrote:

On 19 Mar, 17:04, Jim Logajan wrote:

So what does power gliders? Seems like you are the only one who knows
the real answer.

The sun.

So you were being pedantic after all.

No I wasn't. Unless you think that "the sun" and "gravity" are somehow
the same power source.

Don't feel bad about this. The misapprehensions run very deep, and a
huge number of gliding instructors really don;t understand this stuff.
Not that it matters, really, because you don't need to know
aerodynamics to fly a glider!

Ian