In rec.aviation.student Mxsmanic wrote:
Blanche Cohen writes:

How is it possible to operate an aircraft without an engine that
is in operation?

You'll have to ask glider pilots about that.

On the other hand, no reply from anyone here will satisfy your questions.

Quotations of regulations need to at least mention the subject of my
queries. Many people seem to believe that their own personal
interpretation of regulations has the same force of law as the
regulations themselves, but that is not the case.

Regulations are written to get the maximum meaning in the fewest words.
Sometimes that requires one to make some common sense interpretation of
the words. You seem to want "operation" to mean "when the wheels turn" or
perhaps "when the wheels leave the ground". Most of us think it means
"when the engine starts" (for planes with engines). Arguing over a
definition like this is a common, yet tiring, USENET exercise. It's
especially tiring when the entire thread is posted to multiple groups.
Followups set to RAS.

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Don Poitras