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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Tail rotor failure question
06-23-2018 04:34 PM  16 months ago
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GyroFreak

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Orlando Florida ...28N 81W

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Tail rotor failure question
I have been out of the helicopter business a couple of years but, when I was flying an electric 600 size bird I had a complete tail rotor failure. I was only up about 10 feet (aprox 3 meters) so using the blade inertia I was able to "mush" it down gently with no further damage.
My question is, if you are at high altitude, can you autorotate, or does lack of heading control mean total disaster ?
I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?
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06-23-2018 05:37 PM  16 months ago
pctomlin

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Texas

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You can still do an auto with loss of tail control as long as it is a driven tail (one way bearing). Once in TH the tail will stop spinning and weather vane accordingly.
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06-23-2018 07:34 PM  16 months ago
doorman

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Sherwood, Arkansas

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Auto
You can auto without a driven tail... when you hit the throttle hold and point the nose down, the tail is going to follow...and you use the ailerons to turn the bird... none of the early helis had driven tails.. I have lost the tail on my H-34 (47lbs) and was able to auto and position it where I needed it 2 out of 3 times.. (once not enough altitude to keep the headspeed)

Stan
AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft
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06-23-2018 10:23 PM  16 months ago
ticedoff8

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Morgan Hill, CA. USA

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pctomlin You can still do an auto with loss of tail control as long as it is a driven tail (one way bearing). Once in TH the tail will stop spinning and weather vane accordingly.
I think "loss of tail control" means.... Loss of tail control.
It means the tail is not spinning or the servo is dead. EG: Loss of tail control.

And, autorotating to a safe landing is common with no tail control.
Even with tail control, you should fly an autorotation using minimal tail input. It robs initia and slows the headspeed.

"Back in the day", RC heli tail rotors were no driven and we had to do a lot of autorotations.
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06-23-2018 10:43 PM  16 months ago
BeltFedBrowning

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Kansas City

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If the tail rotor servo fails all the way to one extreme, you are not going to save it if you are flying a helicopter with a driven tail
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06-24-2018 12:49 AM  16 months ago
GyroFreak

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Orlando Florida ...28N 81W

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Thanks all.
When I lost tail control, it was due to my negligence, the belt driven pully in the tail had come loose.
I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?
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06-24-2018 01:04 AM  16 months ago
ErichF (RIP)

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Sutton, NH

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Yeah, loss of tail DRIVE is one thing, loss of tail rotor CONTROL is another. With a driven tail rotor, autos don't usually help much in a loss of control situation.
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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Tail rotor failure question
06-24-2018 10:09 PM  16 months ago
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Andy from Sandy

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Bedfordshire, UK

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I was watching Duncan Osbourne flying one day when the whole tail assembly exited his model. He was at a reasonable altitude.

The model went into a blur piro before he hit TH and landed with no damage done.
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06-25-2018 05:55 AM  16 months ago
Heli143

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Phenix City, Alabama

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Here is a video of Emile Sheriff (copterdoctor) doing 180 autos without a tail rotor in a 30 size Century Long Ranger.

Watch at YouTube

Roy Mayoral
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06-25-2018 06:00 AM  16 months ago
Copter Doctor

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Enterprise/ft.rucker ,al- home of army aviation

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"If the tail rotor servo fails all the way to one extreme, you are not going to save it if you are flying a helicopter with a driven tail"
Very true statement.
Like Doorman said, if you lose drive to the tailrotor at altitude, you can pull off an auto no problem. before driven tailrotors became a standard, we were doing 180 degree autos with non driven tails. it was a standard maneuver in Fai and your engine had to be dead or you received a zero for that maneuver.
last September at the southern scale challenge, I had a blast doing 180 degree autos with my century hawk sport in a funkey 50/600 size longranger fuselage. it has a non driven tail and its fun to watch the tr come to a complete stop before i start the turn on the way down.

Watch at YouTube

drive a rotary, fly a rotorcraft
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