Through decades of trial and work with stop watches and wings of every conceivable design, this is the state of the art.

The contro line speed plane has a "venetian blind slat" for a wing and the RC Speed plane pictured was a Speed Cup winner going through the end of a 200 meter trap at about 220 mph.

Control line combat planes had evolved to a pretty high level of speed and agility. Howard Rush's foamies were fairly high aspect and the best flyers around......until the Russians came out with their own low aspect design that ended up as the single design to survive this very Darwinian event.