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counter rotating rotors
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Source：Internet Author：Unknow Pubdate：2008-05-10
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flyboyof3 (Aeronautics)
9 Jun 06 14:11
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 ?
MikeHalloran (Mechanical)
9 Jun 06 22:08
You mean _coaxial_ counter- rotating?
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.
Is that what you wanted?
Mike Halloran
Pembroke Pines, FL, USA
berkshire (Aeronautics)
10 Jun 06 3:18
flyboyof3 字串7
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. http://www.eagleaviationtech.com/epi%20brochure.htm
B.E.
GregLocock (Automotive)
10 Jun 06 3:33
ONLY ?????
http://www.aerospace-technology.com/projects/kamov32/ Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
berkshire (Aeronautics)
10 Jun 06 11:09
GregLocock (Automotive)
I should have said in the USA.I forgot about the Russians.
B.E.
tbuelna (Aerospace)
11 Jun 06 10:40
http://www.airscooter.com/photos/w_flying4.jpg
字串2
http://www.gen-corp.jp/GENH-4_en/
berkshire (Aeronautics)
11 Jun 06 16:18
tbuelna (Aerospace)
The air scooter is a development of the eagle's perch system for the ultralight market.
B.E.
Intermesher (Aeronautics)
15 Jun 06 23:48
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,
downwash (Aeronautics)
8 Oct 06 13:46
you will need a lot more drawings than that
字串9
HANDCALC (Aerospace)
12 Oct 06 12:57
Flyboyof3,
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.
http://www.newlaunches.com/archives/the_worlds_smallest_one_person_helicopter.php
Good Luck!
（Click：）
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