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HomeAircraftHelicopterCentury Radikal G20-30 N640 Hawk Predator › Driven Tail Question
12-06-2004 07:49 AM  13 years agoPost 1
mikefoy6

rrApprentice

Thief River Falls, MN

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Hey guys

Got a question. I have a Raven with a driven tail on it.

1) if I turn the main blades forward, the tail blades turn forward. BUT i can stop the tail rotation easily with my hand.

2) tail blades spin freely backwards regardless of main rotor direction.

3) if i spin the tail rotor forward, it spins the main blades forward.

Should all of these things be considered "normal"?

I thought because of the driven tail, the tail should be directly coupled to main rotor.

If this is not normal, what should I check?

Thanks for the help.

mike

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12-06-2004 10:42 AM  13 years agoPost 2
ronaldc

rrApprentice

Sandwich,IL.

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Mike, I just built my new Raven50 with the constant tail drive. My main blades and tail rotor are always coupled, no matter which way they are turned. Did your countergear hub have one-way bearings in it? Make sure you have your main gear bolted to main shaft at bottom of gear.

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12-06-2004 12:43 PM  13 years agoPost 3
SteveH

rrProfessor

Texas

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Mike,

Ronald is right. If you have the driven tail option, the tail gears should be driven directly and positively with the main rotor.

The action you are discribing sounds like the slipper clutch, which will operate as you discribe.

The driven tail option moves the autorotation clutch to the intermediate shaft and replaces the auto clutch in the main gear with an aluminum hub.

The slipper clutch is an additional aluminum hub that goes over the main shaft and drives the main gear with an "O" ring slipper after the engine clutch disengages.

The government cannot give you anything without first taking it from someone else.

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