counter rotating rotors
counter rotating rotors
(OP)
hello and thanks for any help? i am wanting to build a counter rotating rotor helicopter. but i dont know how or where i can find the drawings for the rotor shaft and bearings? can any one help me with this ?





RE: counter rotating rotors
Not impossible, but generally a bad idea. See 'flap hinges'. See 'blade flex'.
Boeing Vertol did it with rotors displaced radially, to opposite ends of the aircraft.
Flettner did it with adjacent intermeshing rotors.
Google found a _model_ with coaxial counter- rotating blades that you can buy for less than $200. Is that what you wanted?
Mike Halloran
Pembroke Pines, FL, USA
RE: counter rotating rotors
The only people who have tried to do this sucessfully are Eagles Perch and even they have switched over to making UAV's. here is a link if you are still interested. h
B.E.
RE: counter rotating rotors
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Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: counter rotating rotors
I should have said in the USA.I forgot about the Russians.
B.E.
RE: counter rotating rotors
http://www.gen-corp.jp/GENH-4_en/
RE: counter rotating rotors
The air scooter is a development of the eagle's perch system for the ultralight market.
B.E.
RE: counter rotating rotors
flyboyof3,
Ezycopter sent out an email last month to see if there were people interested in buying just their Coaxial Drive System and then building the rest themselves.
http://www.yoshine.com/home.php
In addition, you might find the pages on this intermeshing helicopter of interest.
http://www.unicopter.com/SynchroLite.html
Dave,
RE: counter rotating rotors
RE: counter rotating rotors
If you like to "fly by the seat of your pants", check out the helicopter video at the attached link. Then contact the Japanese for details on the drive shafts and bearings.
h
Good Luck!