My persomnal experience:
F5d plane, about 1 kw input at level flight:
all of them came out with about more or less the same speedlevel but sure with different motor Kv!!!
As in F5d, F5b, and F3speed propdiameters got bigger over the years and speed did obviously benefit, it should be alowed to ask the question:
Have you guys thought about trying larger diameter blades? Something as large as an 18" could be worth experimenting with.?
Tzeentech, i think there is no reason to get rude and sure any question in this direction makes sense.
As SlowBarless designes and builds his own props , maybe he is just some steps ahead of you?
So whats wrong with a :
........to be continued....