Sir,

I may be missing something here, If the maximum propeller rpm is
2800 . A single rotor engine with max rpm of 1100 with 37 KW @  8750
rpm. With a reduction drive of 3:1 one could achieve maximum
propeller rpm of 2800.

Why can't this engine with low HP but with high rpm be used on the
Parsons auto gyro ( on YouTube https://youtu.be/QOwb8QRHrMY )which
is currently using the 12a Mazda rotary or can it ?

Best Regards Zahid


37 KW is only 50 HP. A Mazda 12A 2 rotor makes at least 150 HP.
Gyro's, like everything else, fly on HP. It probably takes a minimum
of 110 HP to fly a man carrying  gyro.


Paul Lamar

We just need a modern version of the Hiller Rotorcycle :
https://en.m.wikipedia.org/wiki/Hiller_YROE

50hp would be more than enough!

-Dan G.

Actually, it wouldn't, if you want the helicopter to do useful things
besides hover in ground effect at sea level. Paul's number of 110 hp for
a single man carrying gyro is about right, and 150+ hp for a single man
carrying VTOL aircraft, 200 hp for a very light two-seater like a
Robinson R22. Yes, you can store a bit of energy to make a jump takeoff
in a gyroplane if you're lucky. The design boffins at NASA Langley who
are looking at all kinds of wild designs come up with the same numbers.
No avoiding the fact that if you want to hover you need to produce as
much thrust as it weighs, plus a margin to allow for wind.

David Josephson



The Rotary Engine News Letter. Powered by Linux.
If you want off the list PLEASE let me know and I will
remove  you.  ACRE NL web site. http://www.rotaryeng.net
You Tube http://tinyurl.com/beqqxas
Copyright 1998-2015 All world wide rights reserved.