RunRyder - Is it good to know how to stop a nitro engine?

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Safety - RC Helis are not toys > Is it good to know how to stop a nitro engine?

BowerR64
Heliman
Location: kansas city USA

Do you think its good for everyone to know how to stop an out of control nitro engine? Whats the best way to stop one? how do you stop one? Has it ever gone threw your mind, what if it flys into the people how do i stop it?

04-14-2007 Over year old.

Arky
Senior Heliman
Location: Corfe Mullen, Dorset, UK

if its out of control and heading at the crown throw your transmitter at it

dont miss

Wee.Splat

04-14-2007 Over year old.

HOMEPAGE

Kevinator9
Heliman
Location: NZ

Throttle Cut or Throttle Hold are two things you can use, Throttle Cut is a switch that when you switch it it kills the engine but to use it you have to have your throttle all the way down and Throttle Hold keeps the engine in idle but doesn't stop it but the blades wont go faster.

04-15-2007 Over year old.

HOMEPAGE

SkateFreak
Key Veteran
Location: Cambs UK/Luton

if you have radio control of the heli, throttle hold is deff a fav in this situation...
This will disengage the engine, but not stop it...

What with the blades being the most dangerous portion of the mechanics they will be free spinning but not powered...
If you can auto you will proberbly be away of the scary amounts of inirtia these blades can carry so throttle hold is only so usefull...

If you have control of the heli then keep it + relitive to gravity for as long as possible, this will slow the blades...

Falling heli is less dangerous than a falling heli with lots of blade initira...

As for stopping the engine....
If the blades are engaged and spinning your best bet (if you have no radio contact) is to throw an old jacket (you will no doubt conveniantly have with you) over the blades (remove anything from pockets... especially mobile phones). This will grab the blades, partially destroy the jacket and the dragg introduced will hopefully slow the blades

Any more questions just shout...
If i missed any.. jst shout

-Jvr

Oh, and to stop the engine itself if you can get to it, either pinch/pull the fuel line to stop the fuel (pinch slightly faster as a vacumb forms in the line and stops all the fuel running through from the carb), Finger over the exaust (fumes backup and choke the engine), finger over the carb (by far the fastest but not very doable on most helis) or give it a real damn good kick....
I dont know how or why, but the last might just work if you try hard enough

Non-3D heli pilots are planker spys trying to bring down the heli community from the inside - Topher

04-15-2007 Over year old.

Yug
rrProfessor
Location: UK. Herts

Another thing that you can do is add a return spring to the throttle. If the battery becomes disconnected, the spring will close the carb and kill the engine. this is particularly useful in the event of a battery disconnected in a crash and the heli doing the chicken dance. Unfortunately many servos will require quite strong spring but servos like the 9254 only require a weak spring

04-15-2007 Over year old.

jb_turner
Key Veteran
Location: USA

Stick your finger in it!

JB "Do a SEARCH" Turner

04-15-2007 Over year old.

jaggies
Heliman
Location: Sunnyvale, CA

fastest way to stop an engine

If your engine has an exhaust tube, just pinch it tightly shut. The engine will stop almost immediately. No airflow, no power.

In contrast, pinching the fuel tubing stops the engine several agonizingly long seconds later while also providing more power while the engine leans out.

--jim

04-16-2007 Over year old.

maxpower097
Senior Heliman
Location: none

Just hold up a $20 and offer it to whoever crawls under the main rotors and pulls the fuel line. Darwin says someone will take it.

04-17-2007 Over year old.

Mark C
Key Veteran
Location: Houston, TX - USA

Quote
Just hold up a $20 and offer it to whoever crawls under the main rotors and pulls the fuel line. Darwin says someone will take it.

And Darwin would tell you my friend did it for me for $0.

Had a regulator go completely dead at a high idle on the ground. We slid two copper pipes through the skids and someone stood on the end of each pipe.

04-17-2007 Over year old.

Helifat
Senior Heliman
Location: San Diego ,Ca

Fail safe?I think it helps!!

05-01-2007 Over year old.

Betofazzo
Senior Heliman
Location: Venezuela

Call 911

I'm charging batteries.....

05-02-2007 Over year old.

bigdad390
Veteran
Location: e. liverpool, ohio

Carry a small CO2 fire extinguisher with your flight gear. The CO2 will deprive the engine of Oxygen and shut it down. Don't use an ABC or other chemical though, the powder will get into everything.

05-07-2007 Over year old.

dragonslayer
Heliman
Location: Carriere , MS.

Keep a blanket near by through it over heli this will stop any thing flying off and uselly kill it

05-07-2007 Over year old.

heliwreckr
Heliman
Location: Taxigan

i carry a pressure spray bottle with windex and alchohol for clean-up and degrease

adjusted the nozzle for solid stream and aimed for the carb/air cleaner

had to get a little closer than i wanted to, but it worked

paul

05-13-2007 Over year old.

contest10
Heliman
Location: England

"Is it good to know how to stop a nitro engine?"

Yes

"Whats the best way to stop one"

Cut off it's food supply.

07-02-2007 Over year old.

cookie0664
Heliman
Location: Loveland, Colorado (Larimer County)

I had just the need to stop a helicopter engine a couple of weeks ago. We had been working on the heli triming it out and making some adjustments. I landed the heli and took it over to a table near by. I shut everything down. My buddy and I made a few adjustments and it was time to fire it up and give it a test flight!

I had the transmitter and he proceeded to get it ready for a quick start. The helicopter started right up but was idling a little high. I quckly went to trim down the throttle. It seem to go down a little but not enough. I looked at my buddy as she started to spool up. He looked at me as I was tring to get it under control.

We quickly realized that we forgot to turn on the helicopter. Now we both had the blank stare look. We quickly leaned over the heli and tried to slow down the head but it was spinning too fast. As we heard the heli start to rev higher as the engine was getting warmer. Here is when we both start to panic!!! We tried to slow it down again but still no luck.

I realized I still had a set of wooden blades in my trunk and ran over to get one. My buddy leaned over and pulled off the fuel line and she spooled down with no further incident. Yes I know how lucky we are and thankfull someone was watching over us. The bad thing is it was starting to get light on its skids. Long story short or not so short, Keep those old wood blades around for just in case!!

07-04-2007 Over year old.

tim deakin
Senior Heliman
Location: gloucestershire uk

I teach people to make sure they have good access to the fuel line when starting becouse more often than not, beginers (and some experianced) can sometimes start the model with the wrong model memory.so in the event of this happening you are mentaly prepared to pull the fuel line out instantly.
Throttle hold is the first thing you should do in the event of a crash,should this not work you should throw your coat on it to stop the chicken dance.You should also use the 'throw your coat' method if the blades are turning with no radio control.
I have heard of people (BMFA examiners-LOL) pluging the exhaust with an umbrella!!!!!!!!!!!! DO NOT TRY THIS AT HOME.

07-15-2007 Over year old.

HeliTerror
New Heliman
Location: Jacksonville, Florida - Duval

Kinda disappointed with jokesters on here, out of control nitro engines are not to be laughed at. Some guy asks a serious question and some of you would just assume to input idiot responses, do your hobby a favor and say them out loud in your room and forget to type them.

I am new to helis and I can see how a coat or blanket would work assuming the heli is on the ground or not jumping around in a manor that you can not get to it.

Fail safes if I remember cost about $20 or so.
Spring costs less than a $1.
A fail safe requires power to operate so if you lost the receiver battery in the air it will not work. Springs require no battery to operate but can come lose due to vibration or impact with the ground.
Failsafes are cool in the fact that if you do have the wrong model loaded in your radio or if your kid was messing with the radio the night before and you did not notice all you have to do is shut off the tx and the failsafe will drop the throttle servo to wherever you have it set.
The spring will do the same the thing but will not help if you have interference from another radio or whatever. Just remember the spring puts an extra load on your servo and will run your receiver battery down a little faster.
I used both on my higher powered buggies. Buggies don’t have blades but they weigh in at around 8lbs and mine would go 60 or 70 mph, so the need to keep from killing a bystander was there.

Should we wear helmets?

07-15-2007 Over year old.

tim deakin
Senior Heliman
Location: gloucestershire uk

Hi Heliterror,you are rite that it's not a laughing matter and you would be suprised the people who dont know what to do if something does go wrong.I think it's important to imagine every eventuality.

Some potential problems;
Battery failure,
Xtal falling out,
radio interference,
starting with wrong model memory,
starting with the flight mode switch on,
throttle servo failure,
starting with the model turned off,
Servo link falling off,
push rod coming off,
carb sticking open,

The list can go on and on!

Sometimes a spring wont do alot also sometimes a fail safe wont work.Good mechanical set up and good qaulity radio gear ect.is a must with heli's.
It's very easy to say things like'Make sure that every thing is working correctly before you start'.But people are not perfect and sometimes forget.
It is important to know what to do if all else fail's,even if it's someone elses machine.You could potentialy save alot of damage and pain.

07-15-2007 Over year old.

pgoelz
Senior Heliman
Location: Rochester MI

"Should you know how to stop a nitro engine"? If you have to ask.....

I am surprised no one has mentioned holding a blade grip. I ALWAYS have a firm grip on a blade grip from the moment I remove the start shaft (which also effectively prevents the head from spinning up) to the moment I set the heli down in take off posiiton and back away. I also stop the rotor and hold a grip whenever I approach a running heli for any purpose such as mixture adjustment. No exceptions. While holding the blade grip I can also easily pull the fuel line off if I need to.

I also make it a practice to flip the throttle hold switch whenever I am near my running nitro heli (or my stopped electric). It is very easy to bump the collective stick.....

I would think a throttle return spring would only be useful in the event the linkage fell off. To be able to pull the servo back to idle position it would have to be strong enough to significantly increase the steady state load on the servo in flight?

Paul Goelz
Rochester MI USA
http://www.pgoelz.com

07-26-2007 Over year old.

HOMEPAGE

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