VPP Tail Rotor???  
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VPP Tail Rotor??? - 3/10/2007 11:49:39 PM   
PilotLight



Posts: 794
Joined: 8/15/2003
From: Benton Harbor, MI, USA
Status: offline 		Has anyone tried a Variable Pitch Prop system on the tailrotor of an electric heli. Wouldn't it be better than fixed pitch and easier than using a belt or torque gear?

I thought thats where VPP planes came from (the heli guys), but just noticed I haven't seen a heli with a VPP tail.

< Message edited by PilotLight -- 3/10/2007 11:50:16 PM >
       Post #: 1

RE: VPP Tail Rotor??? - 3/11/2007 12:12:42 AM   
Rotor13B


 

Posts: 250
Joined: 5/19/2003
From: Co
Status: offline
quote:

ORIGINAL: PilotLight

Has anyone tried a Variable Pitch Prop system on the tailrotor of an electric heli. Wouldn't it be better than fixed pitch and easier than using a belt or torque gear?

I thought thats where VPP planes came from (the heli guys), but just noticed I haven't seen a heli with a VPP tail.
How would you mix it? You would have to go seperates and a new controller for sure if it was even possible.

(in reply to PilotLight)
       Post #: 2

RE: VPP Tail Rotor??? - 3/11/2007 3:51:06 AM   
Heliko



Posts: 591
Joined: 1/16/2007
From: Long Island, NY, USA
Status: offline
quote:

ORIGINAL: Rotor13B

How would you mix it? You would have to go seperates and a new controller for sure if it was even possible.

You'd have to hook up both speed controls to channel 3 via a Y-harness of course the tail speed control would have to go through an HH gyro first. Then use channel 4 for the servo that controls the rudder linkage. It could probably be done, but it seems kind of redundant.

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(in reply to Rotor13B)
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RE: VPP Tail Rotor??? - 4/28/2008 6:39:14 PM   
PilotLight



Posts: 794
Joined: 8/15/2003
From: Benton Harbor, MI, USA
Status: offline 		Its been done, and it works.

http://www.rcgroups.com/forums/showpost.php?p=9650548&postcount=6604

(in reply to Heliko)
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RE: VPP Tail Rotor??? - 4/28/2008 10:47:08 PM   
BigTruckDriver


 

Posts: 194
Joined: 10/2/2004
From: , TX, USA
Status: offline 		Am I missing something? Wouldnt a belt driven be better?

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If it isn't broken,adjust it till it is.

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RE: VPP Tail Rotor??? - 4/29/2008 10:59:00 AM   
Rotor13B


 

Posts: 250
Joined: 5/19/2003
From: Co
Status: offline 		Yeah it works but they've already burned up a brushless tail motor and esc running it in idle up mode. It is a cool idea but I don't think the tail motor needs to be running at %100 or close to it since it has variable pitch. Get that worked out and you'd be on to something great.

(in reply to PilotLight)
       Post #: 6

RE: VPP Tail Rotor??? - 4/30/2008 2:11:02 AM   
Shadow99


 

Posts: 363
Joined: 8/23/2007
From: Southwick, MA, USA
Status: offline 		That is pretty cool, however it is still requires alot of electronic equipment, that can glitch, overheat/overload and fail without warning.
Having SEVERELY abused the BDT for the past 6 months, and having NO issues with it, other that burying the CF tail blades into dirt & rocks.
I'm still on the original belt, drive cog, idlers. Had to replace the tail box plate after a hard crash (snapped-off pitch control mount), but that has been it.
I flew my buddies BCPP last weekend, and remembered quickly how much the EDT w/rate gyro system SUCKS! Piro's lacked "POP" and tail response nose right lagged behind, left was OK. Too bad for him that the BDT for the BCPP cost more than the heli itself!

Shadow


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(in reply to Rotor13B)
       Post #: 7

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