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HomeScaleAircraftHelicopterScale Model RC Helicopters › Tail reversed?
10-13-2005 10:58 PM  12 years agoPost 1
Russ Delaney

rrApprentice

Ashbocking, Suffolk, UK

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Just fitted a 50 deg gearbox to the tail rotor drive on a vario lynx.

My question is Ive had to turn the tail rotor blades the other way because of the gearing.

I know you should have the advancing tail blade going up into the downwash of the main rotor but now they go with the downwash.

Has anyone flown like this and noticed a reduced tail authority?

Russ

Team Quick UK Pilot 20

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10-13-2005 11:53 PM  12 years agoPost 2
Peter Wales

rrElite Veteran

Orlando Fl

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Russ, take a good look at your helicopter. If the main rotor is above the tail rotor you are going to have some severe problems if you ever apply negative pitch.

The answer is no, it doesn't matter which way round the tail rotor goes. However, some manufacturers have put a bias in the pitch control system so that the heli will hover with the pitch control in the center. If you have changed the direction of the rotor, this pitch bias may be the wrong way round and you will find you cant get enough travel in one direction.

It is usually simple to get longer or shorter ball links as necessary to get the pitch correct and thats all you need to change.

Peter Wales
http://scalehelicopters.org

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10-14-2005 12:55 AM  12 years agoPost 3
Russ Delaney

rrApprentice

Ashbocking, Suffolk, UK

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Tail rotor
Thanks for the Reply Peter, I have just checked the bias and luckily with the pitch change lever at 90 deg (center) it has even pitch movement either side.

Because the lynx has a high mounted tail rotor on the fin it is slighlty lower than the main rotor but not much.

Russ

Team Quick UK Pilot 20

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