Define 'quickly' (rate). I think the aero pilots (FS) here have the best handle on this, as they pilot craft that most closely approximate our RC stuff. As they've already pointed out, the downwind turn thing is a myth.

Did anyone else see the Mythbusters episode on this, where they drug a canvas under an ultralight/LSA type and came to the WRONG conclusion? it got airborne, but the pilot was adding power and started moving forward (a DQ IMO).