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Mikado Modellhubschrauber . GrandRC . CanoMod

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Safety - RC Helis are not toys > Is it good to know how to stop a nitro engine?
 
 
Dood
Elite Veteran
Location: America's Dairyland

As I have experienced a battery disconnect after a crash impact, I know exactly how it feels to watch a heli do the chicken dance, and have no control to stop it.

I don't want to put any springs anywhere on my heli.

The towel suggestion is the best one, IMO.
I have read in many a club's bylaws, that they actually REQUIRE a pilot to have a towel at the field, and the pilot will keep the towel at his side during flight operations.

As most pilots don't actually bother to keep a towel at their side,
what several guys have done, is to simply take the shirt off of their own back, and use that to throw at their heli.
This technique is ESPECIALLY useful for female pilots! .

Your other option is to simply wait. Either the blades will break off completly, or the gear train will eventually strip.
The heli should stop chicken dancing at that point.

Either let it run out of fuel, or

Approach the heli with caution and
Plug the exhaust with your finger or
pull the fuel line or
shut the carb manually.

"El Dooderino" if you're not into the whole brevity thing.
07-29-2007 Over year old.
HOMEPAGE  
 
 
SSMKN2
Senior Heliman
Location: Ft Drum NY

Just disconnect fuel line...i leave one accessible for refueling anyway....as long as your on the ground it works fine

Joel
OH-58D Crewchief
Raptor 60
T-Rex 450
Predator Carbon SE Gasser
07-31-2007 Over year old.
 
 
tim deakin
Senior Heliman
Location: gloucestershire uk

how do you disconect the fuel line if the blades are spinning?
07-31-2007 Over year old.
 
 
pgoelz
Senior Heliman
Location: Rochester MI

I have given it a lot of thought and frankly, if my heli was spooled up on the ground and I had no throttle control I would simply set a couple degrees negative collective and stay clear until it stopped. I would be very afraid that if I threw something at the rotor from close enough to reach it, it would either throw it back at me or physically disturb the heli enough to attack me or hit me with flying debris. Fortunately, a heli without pilot input has no idea how to fly so it isn't going to go very far if it is already on the ground. Just stay clear and wait. And wait......

Paul Goelz
Rochester MI USA
http://www.pgoelz.com
07-31-2007 Over year old.
HOMEPAGE  
 
 
Hoverdown3K
Key Veteran
Location: Rochester, New York

I suggest.. flying Electric power models.

-= I know there is Money in RC helicopters. I put it there=-
07-31-2007 Over year old.
HOMEPAGE  
 
 
legoman67
Elite Veteran
Location: Nanoose Bay B.C, Canada

electric if anything is more dangorous, the only way to kill it would be to cut the power. no other way. and the blade spin alot faster on most electrics. and if the battery fals out your already likly afew hundred in reapir costs as the battery is probably no good anymore.

Matt M.
http://www.filepile.ca
07-31-2007 Over year old.
HOMEPAGE  
 
 
pgoelz
Senior Heliman
Location: Rochester MI

In a way, electric is indeed more dangerous than glow/gas. But in another way it isn't.

Brushed electric setups are potentially very dangerous.... a shorted output FET will cause the motor to run full throttle until the battery is disconnected or dies and can happen at any time including the moment you connect the battery. However, with a modern brushless setup there aren't many failure modes that can cause the motor to suddenly go full throttle unless the radio commands it. Radio noise or the loss of the signal can, with some receivers, cause motor activation.

That said, I still treat my electric planes and helis like loaded guns when the power is connected.

Paul Goelz
Rochester MI USA
http://www.pgoelz.com
08-01-2007 Over year old.
HOMEPAGE  
 
 
TRACERBOB
Senior Heliman
Location: Panama City, FL USA

Many years ago, I crashed my revolution 40 pretty good. The reciever battery had broken free in the crash and there it was at half throttle, chicken dancing like no tommorrow and no way to kill it. I had this towel with me so I threw it onto the heli. It jammed the gears and brought it to a screaming halt. Since then, I always have a towel or shop rag with me just in case.
08-06-2007 Over year old.
 
 
tamuco
Senior Heliman
Location: Logan, Utah-USA

How do you pull the fuel line or pinch of the muffler if the heli is full throttle? I wouldn't dare go near it at that point.
08-10-2007 Over year old.
 
 
TRACERBOB
Senior Heliman
Location: Panama City, FL USA

"How do you pull the fuel line or pinch of the muffler if the heli is full throttle? I wouldn't dare go near it at that point."

Carefully

Sorry, I had to throw that in. My best advice is to never get in that situation. If you have no radio contact with the heli, there's not much you can do but watch it fly away. I would say throw the towel on it. At least you'll have something to repair.
08-10-2007 Over year old.
 
 
GyroFreak
Key Veteran
Location: Florida ... 28° 50' N 81° 16' W


My antichicken dance spring. Loss of power, engine shuts down. Like YUG says some servos may need a lot of spring tension. Mine didn't so I'm ready for power loss on crash or broken servo arm. The carb (walbro 644 has a built in spring on the throttle butterfly shaft, so a broken or disconnected push rod, and it still shuts down. This last one happened to me while sitting on the ground spooling up for a take off, it just broke, no reason I could see, but it just quitly shut down..

Support bacteria. They're the only culture some people have. !
08-10-2007 Over year old.
 
 
Raffy
Key Veteran
Location: Chicago, Illinois

YES!
You need to activate your Kill switch or Auto switch to stop the engine or keep in idle.
If the heli is in your control (that's if you are holding it)you need to be able to pull the fuel line from the carb immediately.
If the heli is in a chicken dance throw a towel or shirt at it.
If the heli is on the ground running with blades spinning and no control, stand back and throw a towel or shirt at it immediately before it places you and others in danger of the heli taking off.
08-10-2007 Over year old.
 
 
Norman
Heliman
Location: Stockholm, Sweden

Well. With my heli at an experienced mechanic we set out to test it on his flying field...

We had noticed the receiver glitching a bit (WARNING SIGN) and just continued to check the connectors to make sure everything was inorder.

Then we headed out, started the engine and he started to move the throttle upwards...

Almost when the heli was about to take off we noticed that the radio had lost contact with the heli.

Being an experienced pilot and mechanic he was very daring and went back into tool shack and got a grip.. Crawled under the heli and pinched the fuel line off the engine.
Now afterwards I realise how dangerous this was... I'd have waited until the engine had run out of fuel or done something much safe.

Turns out the battery solder for the power feed cable was bad , had to resolder the battery to fix this problem.
Now - if I got a glitching receiver like this one.. I'd be damned to find out the problem for sure and test every case without starting the engine.

"The real heli season has just begun! Autumn, storm, hail, drift ice and heli - just perfect&qu
09-07-2007 Over year old.
 
 
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Safety - RC Helis are not toys > Is it good to know how to stop a nitro engine?
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