Boy, this brings back some memories! My first "real" model airplane had a Wen-Mac 049 on it. As I recall, it was a knockoff of the Atwood Wasp.........or am I having a senior moment? Anyway, mine ran like a bat out of h--- on a Jim Walker Firebaby. The neighbors hated it. I would go out on our screened-in porch to "test run" it at every opportunity. I probably wore it out "testing" it! Dzl