"I don't believe that a Sport Pilot eligible Ercoupe can be a Certified Light Sport Airplane."
That is correct, John. The Ercoupes, like some other planes (J-3 Cub,
Taylorcrafts, Luscombs) falls under the classification of planes that can be
flown by a Sport Pilot under those rules (no night, have to be able to see the
ground, etc.).
Percy in SE Bama
