Obviously, with anything over 0.0499 cid being class A we are already not limiting this forum to 1/8A and 1/2A. And while an airplane powered with a 0.46 cid engine is out of place here, should we have a definite limit? This is not to rule out illustrations of larger planes to expand or clarify a point, but rather an unofficial limit on engine size for the main part of the thread.

If you don't like any of the choices I've given let's have your proposal in a post, and please, reasons. The 0.20 2c and 0.30 4c seem to be where we generally are.

The "Official" limit for class "A" is 0.15 2c and 0.25 4c.

And we'll always allow the electric players to come see what real fliers are doing. Haw.

Bill.