FAR 91.309 does not define a glider to be an aircraft that has an N number.

I have not researched the matter, but under FAR 1.2 General definitions,
glider is defined as "a heavier-than-air aircraft, that is supported in
flight by the dynamic reaction of the air against its lifting surfaces and
whose free flight does not depend principally on an engine."

There may be other language that disqualifies the Sparrowhawk, but it is a
glider by FAR definition.

Colin



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