In article ,
"The Enlightenment" wrote:

The small wings of tilt totors reduces drag considerably and helps
speed. Not having the propeller wash flowing over the fueselage also
helps. Lets assume they were wrong. Would you accept 330mph?
300mph?

Try 150, *maybe*, once they got the massive problems involved with
workable tiltrotor configurations out of the way. It's a huge amount of
handwaving, though.

"If magical faries came to Earth and gave them a workable
transmission/power plant setup, and resolved the control problems, then
they might have made the design work..."

--
cirby at cfl.rr.com

Remember: Objects in rearview mirror may be hallucinations.
Slam on brakes accordingly.