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HomeScaleAircraftHelicopterScale Model RC Helicopters › 4 blades head
12-12-2004 05:49 PM  13 years agoPost 1
hydraulic

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Fresno, CA

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I'm building a Black Hawk, but I still have some problems. Can anybody help me out to these questions:
-What size of blades (4 blades head) for 60 size engine?
-what is maximum of positive pitch? 10? 12 dregree?
-Do scale helis need negative pitch?

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12-12-2004 06:29 PM  13 years agoPost 2
rotorsport

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St. Albert, Alberta, Canada

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12-13-2004 07:11 AM  13 years agoPost 3
Gearhead

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Vt

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hydraulic

If you haven't bought your rotor head yet, Century is working on a new head, its should fly better and look good, as for negative pitch I would start with 1 or 2 degrees, then go from there, make sure you add a good amount of Expo, these flybar'less heads and be touchy on the cyclic.

Jim

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12-13-2004 08:08 PM  13 years agoPost 4
hydraulic

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Fresno, CA

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Thanks for info buddies. The reason why I ask about pitch is that I'll modifiy the X-cell by shorten the main shaft 3/4" to make heli look scale with low rotor head. Therefore, the way of swashplate go up and down is limited, just give about 12-14degree (not 24 like before). I wonder if it's enough for flying(not 3D). I have a vertol CH-46 and fly it well but never fly other multiple blade head . Do you think I can handle mutiple blade head?

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12-14-2004 01:26 AM  13 years agoPost 5
Joel Rosenzweig

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Marlborough, MA - USA

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Pitch range for multibladed head
I use a pitch range that is -1 to +9 on my 3-bladed Vario Lama, and that is all the pitch I need. You should be perfectly fine with 12 degrees of movement.

Joel-

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