Even if YOU had the balls, the DA doesn't..A DA 150 will not swing a large enough prop to go 250 mph..We have been racing Giant scale for about 10 years....Our best speed with a 289cc Herbrandson twin on glow is 234 mph..The prop is a custom carbon fiber from Australia, costs about $250..It's a 23x27, turns about 9400 rpm...The best speed with an Aerrow twin, 200cc, is about the same with a slightly smaller prop turning over 10,000 rpm...
A Nosen P 51 would disintegrate at that speed....