Greg B wrote:
"Morgans" wrote in message

My Ercoupe (now sold) didn't have a transponder. I could, and did, fly it in
any airspace except B (and A :-) ).


Not legally. You can't fly above 10,000 feet in controlled airspace
(admittedly a stretch in the 'coupe) nor in class C or within 30 miles
of the class B airports.