Paul,
Could a single rotor engine with 80 hp and weight under 100 lb be put
together from existing pieces? John Uptigrove, who builds the Mosquito
Helicopter
http://www.innovator.mosquito.net.nz/mbbs2/specs.asp
was going to upgrade his ship by installing the AeroTwin engine
http://aerotwinmotors.com/07/pages/features.htm
Apparently the thing shook so bad that his hand on the collective went numb.
He took it out and sent the thing back because he was afraid it would damage
his aircraft. The engine he's currently running is the Compact Radial MZ
202:
http://www.compactradialengines.com/spmz202.html .
I think the single rotor would work well. The shaft speed of the MZ 202 is
5800 rpm so no changes should be needed in the transmission. What do you
think? The Mosquito XE is a great flying little ship according to
everything I can find out about it, it deserves a better engine.
Steve
Not really. Your best bet is a Rotamax if Eric gets it together.
http://www.rotamax.net/ 75 HP at 90 pounds.
BTW that is a real cool helicopter. I saw a demo at OSH.
Excellent design. I was mightily impressed.
--
Paul Lamar ...No rotor no motor.
Paul,
From the stuff I've seen on this forum, Rotamax isn't ready yet. Do you
know if they're actually flying anything? By the way, I'm going to be at
Santa Paula tomorrow morning (Sunday). Would you like to meet us for
breakfast? We should be there around 10:00.
Talking about helicopters, I've been thinking about the turbo-compound idea
for the Mazda and it seems to me that it would work especially well for a
helicopter application because of the narrow RPM range of the rotor. Is
anybody working on this?
Steve
Yes I think they do have a ways to go. For a helicopter engine however they
are closer as they don't need a aircraft prop reduction gear box. They can probably use
what ever Mosquito has now along with a torque pulse damper. I sure hope Rotomax
does not go down any dead ends. I am keeping my fingers crossed. The 100 to 150 HP
Wankel rotary market desperately needs a light weight engine. I hope they have the
perseverance to stick it out. Many would-be Wankel builders have failed.
Mazda has kindly published a lot of SAE papers and a few books on what they
have learned. Some of it the hard way. I hope the people at Rotamax have
read all that stuff. The piston engine has been around for over 100 years
and thousands of piston engine builders have added to piston engine technology.
Basically we have only Mazda and maybe one or two others.
I think Boeing/Rocketdyne is working on the turbo compound wankel
for UAV use.
I'll meet you in the Logsden coffee shop at ten.
BTW do you have any good photos of the V22 rotor head?
--
Paul Lamar ...No rotor no motor.
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