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600 Class Electric Helicopters 600 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar. |
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05-03-2015, 06:34 PM | #1 (permalink) |
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Join Date: Apr 2015
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trying tail motor variable RPM fixed pitch
i am working now on my rc heli size 600...
i tried to connect my microbeast Gyro tail pins to a tail brushless motor fixed pitch angle and change thrust through changing RPM i know its response is bad but i dont want it to be a 3D... just hovering my problem is tail motor rotates when i rotate the heli ... but motor rottes then stops... change rc heli motor rotates thes stops... i want it to still rotate until heli return to its yaw angle to be staible... can any one help me?? if it is bad idea can i use this motor? http://www.philshobbyshop.com/catalo...u?sku=GPMG4501 and if i use it how can i make it rotate with fixed RPM to control heli through pitch angle... thank you |
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05-03-2015, 06:46 PM | #2 (permalink) |
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Join Date: Nov 2012
Location: Maryland
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What are you trying to accomplish by using a tail motor? There's a reason that none of us do that. I have no idea how you would set up a FBL to run a tail motor.
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<> Trex 600 ESP FBL, Trex 500 ESP FBL, Gaui X3, Oxy 3 <> <> Builds in progress: Logo 600SX, Synergy 516 <> *Spartan Vortex VX1e*
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05-03-2015, 11:30 PM | #3 (permalink) |
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Join Date: Aug 2011
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The real question is why? Everyone does everything they can to get away from motor driven tails
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05-04-2015, 12:23 AM | #4 (permalink) |
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Join Date: Jan 2007
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The reason why you don't want to do it that way apart from it will never have good tail performance (due to the motor not being able to change rpm fast enough) is because you can't auto rotate, and because modern fbl controllers aren't designed to drive that kind of tail. I suspect it will take major tuning and work to get it to even hover, let alone fly fast forward flight at any reasonable speed without something freaking out.
It's an interesting thought to play with, but I think you will find yourself frustrated in the end. schu |
05-04-2015, 01:47 AM | #5 (permalink) | ||
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Join Date: Dec 2011
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A motor driven tail has been a factory option on Minicopter helis for years now.
You can auto rotate you just won't have yaw authority. |
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05-04-2015, 01:51 AM | #6 (permalink) |
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Join Date: Jan 2007
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I stand corrected, with a vbar no less, very interesting.
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05-04-2015, 10:51 AM | #8 (permalink) |
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Join Date: Nov 2012
Location: Maryland
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So the Vbar is still controlling a servo, while the ESC runs the tail motor.
__________________
<> Trex 600 ESP FBL, Trex 500 ESP FBL, Gaui X3, Oxy 3 <> <> Builds in progress: Logo 600SX, Synergy 516 <> *Spartan Vortex VX1e*
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05-05-2015, 08:51 AM | #10 (permalink) |
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Join Date: Nov 2012
Location: Maryland
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So for the OP to do what he wants, he's going to need his rudder channel to act like a throttle channel. He would have to figure out what rudder-throttle level would hold his tail steady, and somehow set up his rudder so that signal is provided to his tail ESC when his rudder is mid-stick. Are there any radios that allow you to do that?
Sameh, are you getting a feel for how difficult this option is going to be? You're going to have a much easier time (and better performing heli) just using a main-motor-driven, variable pitch tail.
__________________
<> Trex 600 ESP FBL, Trex 500 ESP FBL, Gaui X3, Oxy 3 <> <> Builds in progress: Logo 600SX, Synergy 516 <> *Spartan Vortex VX1e*
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