not to figure out how to mold the lipo's to the shape of a fuse so they can be the outside of the fuse.
Oh yeah, don't forget that you can probably cram at least a few Lipo cells into the wing since they are pretty thin.
So what's the calc for pitch speed? something like (Pitch in inches x rpm)/ 1056 = mph?
So a 5 pitch will get you to 200mph at 42K rpm, easily attainable with electric motor.
And a 6 pitch at 44K will get you 250mph pitch speed.
I don't know enough to figure out efficiency factors, prop tips nearing/exceeding speed of sound, form drag, lift drag, etc.....
I'm pretty sure that you'd want an airframe with the lowest drag possible, or a HUMONGUOUS-GIGANTIC amount of thrust
Also, the Lipo technology is continuing to move at a rapid pace, energy density is going up, packing more and more power into a smaller and smaller package (hey, isn't that what they call a bomb
)