"Morgans" wrote in message
...

"SR20GOER" wrote

Slightly OT I know but can someone advise me (since we are talking
airspace) - are transponders mandatory to carry and use in Class E
airspace in the US?

Transponders are required for all registered aircraft, if they were
manufactured with an electrical system.

They are??? Is this a 'new' rule, like aircraft (with electrical)
manufactured after a certain year?

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

-Greg B.