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Other › Seperate motor for the tail rotor - how too?
12-09-2008 10:22 PM  8 years agoPost 1
jrvander

rrVeteran

Camp Foster, Okinawa japan

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Hello to all,

I'm working on a scale model with an elevated tail and I'm hoping someone can shed light on a mechanical setup issue I have.

I want to have a seperate brushless motor driving the tail rotor and I have no idea how to rig it up. I assume I'll need a seperate ESC to drive it in gov mode for a constant 10k rpm from my rough calculations, but do I control it via the throttle channel with a Y-connector or through another channel using end-points?

The Joker 3DD has a seperate Kora tail motor driving the torque tube and is a pretty close concept to what I want to build:

(photo lifted from the joker website)

Assuming I can get this hooked up properly, are there any guidelines or rules-of-thumb I should be aware of like spool-up rate, optimal rpm (I'm guessing a 5:1 ratio of the main rotor disk), etc.?

Thanks in advance for any help you can offer!

- Jon

Posted in the scale section as well.

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04-23-2009 07:21 PM  8 years agoPost 2
ints

rrNovice

Estonia, Europe (EU)

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1) Y-cable and suitable 5:1 "offset" gearing compared to main gearing?
2) instead Y-cable a computer radio, enables some clever mixing, depending on flight mode (inc. power off tail in case of main gear failure)?
3) maybe http://www.castlespecialprojects.com/csp_software.html can be useful to have better control ever ESC?

Let me know, if you find a solution...

Webmaster of HeliWeb: www.heli-web.com
Organizer of Helicamp Estonia: www.helicamp.eu

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04-23-2009 07:49 PM  8 years agoPost 3
duke666

rrKey Veteran

Hampshire, UK

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I am sure you will find some useful info here. I've been following this for a while:

http://runryder.com/helicopter/t492...?top=1240512414

Regards

Duke

OOOPPS............

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