RunRyder RC
 9  Topic Subscribe
WATCH
 1 page 4036 views
Scorpion Power Scorpion Power
HelicopterSafety - RC Helis are not toys › Throttle linkage came off..!!...
10-09-2005 04:17 AM  12 years agoPost 1
eleewhm

rrNovice

Inglewood,California

My Posts: All  Forum  Topic

well had a freaking fright....yesterday while flying...doing my normal forward flight...suddenly noticed no thtottle control...tried to cut off engine with engine cut switch..no go...!!...

landed heli with blades spinning at full throttle...and found out..throttle linkage came loose....

not to try
i still managed to pinch the fuel line...but boy was it dangerous..imagine i had to lean down low on the ground and reach for the fuel line...taking care not to tilt the heli...in which tilting it will cause the heli to skin me!!...i was not thinking straight,,,and it was a very silly thing to do....i should have just let the fuel run out....!!! Stupid me

redid the throttle linkage with double nuts and locktite it now...

PM  EMAIL  Attn:RR  Quote
10-09-2005 06:06 AM  12 years agoPost 2
3Dx

rrElite Veteran

Monterrey NL

My Posts: All  Forum  Topic

You was looky...


Safety for all, please Read

I promised myself that I would pass this on to all. If this prevents one person from having the same type of thing happening to them, then I will feel better. I had an accident yesterday, in which I as a newbie; caught my hand in the fly bar paddle shaft that extends past the lock nut. Ripped the hand open in two places with 6 stitches later to close.
Have I got your attention?
I had my 30 size heli on a work mate, clamped down with out the main blades (I read some place that you should do your first tests on a new heli this way and it’s a good thing too) on as I wanted to do my first test run on the engine and mechanics. I was on my second tank of fuel with all going good, trying to set the idle. Things were progressing well and was able to control the engine rpm both up and down and back down to idle.
During the second run at about 1/2 tank of fuel, I had the heli set to idle. All of a sudden, the engine went to FULL throttle. I looked at the radio, and the stick was at the low or idle setting. I picked up the radio, and tried some inputs, but had no control. I then went to the side of the heli where the throttle linkage is, and looked at that. I noticed that the control rod was missing. (Actually the vibration set the harmonics so that it appeared to not be there. I reached down to move the throttle back to idle and engine cut off, when WHAM I was hit in the right hand just below the little finger in the fleshy part of the side of the hand. Never felt it.
I pulled my hand away, and looked, saw two GASHES, DEEP, and tried to think of how to shut this darn thing off. I figured my only choice was to pull the fuel line off. I went to grab the line, and when I went to pull, I also squeezed the line, and the engine shut off almost instantly. Went into the house, got my wife and went to the Urgent Care office. Six stitches later and here I am.

Now in hind sight:
I should NEVER have tried to reach for the throttle linkage. Just squeezed the fuel line to stop the heli first, and then solve the problem.
Up till the point of going full throttle, I was aware of the fly bar paddles, and was very careful around them. Due to the change in the operation of the heli I reacted with out thinking things through.
The paddles are black; I did not see them when they were at full throttle. I will add some white tape or something so they will be more visible when the heli is running. Thank God I did not have the main rotor blades on.
I will not panic next time, but sit back and analyze the problem and how to remedy the situation before taking action.
Going full throttle could have been caused by exhausted TX battery or some interference on my channel. Mechanically all else looked sound. Always top off the receiver battery before flight or testing.
Above all, respect this machine as it is no different then a power tool in that sense. Have respect for it and follow all safety instructions.
I am now a true believer in safety really always have been (just got dumb for a second or two); this machine is NOT a toy. Keep that in mind at all times.

Remember, think before you reach. Be aware of your surroundings, etc. etc.

Looking forward to comments. I know that I did a REAL dumb thing and I'm lucky to get away with just 6 stitches. I just hope this helps someone else out there.

Brewskies

PM  EMAIL  GALLERY  Attn:RR  Quote
10-10-2005 01:30 AM  12 years agoPost 3
Yug

rrMaster

UK. Herts

My Posts: All  Forum  Topic

Full pre-flight and post-flight checks should have prevented this.

How the hell did you pinch the fuel line with the blades at full speed? don't tell me you crawled underneath it !

PM  EMAIL  GALLERY  Attn:RR  Quote
10-10-2005 01:54 AM  12 years agoPost 4
ErichF

rrElite Veteran

Sutton, NH

My Posts: All  Forum  Topic

I'da just flown around in FFF and let the fuel run out. Hope them weren't wood blades

Look over those blade roots and grips real well, might have over stressed them.


Erich

PM  EMAIL  GALLERY  Attn:RR  Quote
10-10-2005 02:04 AM  12 years agoPost 5
Saint728

rrProfessor

Honolulu, Hawaii

My Posts: All  Forum  Topic

I red Loctite 262 the nuts all my ball links. Never had one come off even when I want them to, lol.

Take Care,
Cheers, Patrick

Check the hotties in my Gallery
http://rc.runryder.com/helicopter/gallery/9019/?all=photo

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-10-2005 09:55 PM  12 years agoPost 6
OsiViper

rrVeteran

Farmington, NM

My Posts: All  Forum  Topic

My Dads did that.. only the whole ARM came off (tt 50 engine)

Only thing he could do to keep headspeed down was to keep it on ground with about 6degrees of negative pitch untill the fuel ran out...

PM  EMAIL  GALLERY  Attn:RR  Quote
10-10-2005 11:02 PM  12 years agoPost 7
brooksnb

rrKey Veteran

Sussex , New​Brunswick , Canada

My Posts: All  Forum  Topic

i had to lean down low on the ground and reach for the fuel line...taking care not to tilt the heli...in which tilting it will cause the heli to skin me!!
Glad you made it out alive !! I can see you value that heli a lot more than I value mine...LOL...

.

Never, under any circumstances, take a sleeping pill and a laxative on the same night.... Dennis

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-10-2005 11:27 PM  12 years agoPost 8
SkateFreak

rrElite Veteran

Cambs UK

My Posts: All  Forum  Topic

Lol.
A while back i got into a situation when i had a tail failure close to the ground,
The heli went into a spin and was heading for the only other guy in the field (sods law).
Due to the speed the heli was going towards him i wouldnt have had time to cut the throttle and wait for the heli to stop rotating to the point i could correct direction (plus i'm no chaos'ist lol).

So i hit idle and pushed 7 degrees of negative pitch into the ground @ 1750rpm (R30v2) from about 3 foot off the deck (the heli was about 15'ish foot away from him as he's strayed out from the pits and was fiddling with his R50 with his back to me).

Didnt do to much damage, he got the shock of his life as did i, we both learnt a lot there *shrugs*.

My heli is no where near worth risking anyone, heli's can be replaced, fingers, arms, necks and ears cant *shrugs*

-Jvr

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

PM  EMAIL  GALLERY  Attn:RR  Quote
10-11-2005 11:51 PM  12 years agoPost 9
eleewhm

rrNovice

Inglewood,California

My Posts: All  Forum  Topic

oh ...i am reminding ppl that to check the throttle linkage in this post...not boasting about how i managed to shut off the fuel line..

it was a dangerous thing to do...

PM  EMAIL  Attn:RR  Quote
10-12-2005 03:07 AM  12 years agoPost 10
MicroDOC

rrVeteran

Goleta, CA

My Posts: All  Forum  Topic

Overlooking most everything else you mentioned in this post I'd like to recommend two things that can help with your throttle problem. One is a push pull system and the other is a return spring. Both of the above can be lifesavers.

Experience is something you don't get until just after you need it!

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-12-2005 04:40 AM  12 years agoPost 11
eleewhm

rrNovice

Inglewood,California

My Posts: All  Forum  Topic

most properly i will be going for the push pull system

PM  EMAIL  Attn:RR  Quote
10-12-2005 03:07 PM  12 years agoPost 12
Magnumeng

rrVeteran

29 Stumps, CA

My Posts: All  Forum  Topic

Would it be practical to hook a spring up the throttle just incase this happens so that the engine go to idle? Just my 2 cents

A 4 foot dowel with a hook at the end works great to pull the fuel line incase your copter goes nuts on the ground.

TDR, Kontronik Kosmik Cool 200, Kontronik 750-56, CGY750,
Team KBDD

PM  EMAIL  GALLERY  Attn:RR  Quote
10-12-2005 03:28 PM  12 years agoPost 13
reddragon

rrElite Veteran

Brooklyn, N.Y.

My Posts: All  Forum  Topic

The metal throttle arm on my Thunder Tiger 39 snapped clean off a few months ago. It screamed for a good fifteen minutes when I set it down until the fuel ran dry. Even with a pre-flight inspection you may not notice metal fatigue so I still missed that one.

Wayne - Fly it like you stole it! You're in good hands with Runryder!

PM  EMAIL  GALLERY  Attn:RR  Quote
10-12-2005 03:57 PM  12 years agoPost 14
playfair

rrKey Veteran

Rochester, NY

My Posts: All  Forum  Topic

Whoa 3Dx! Glad you're ok. Based on your story, 6 stitches seems like it could have been 60! Not that it helps now, but the ancient procedure you spoke of (as well as the practice of strapping the heli to a ladder for engine adjustment) has been pretty much shunned at this time.

Microdoc- have you gotten the spring thing to work?
I couldn't get it to function reliably on either of my OS50's (1 hyper).
Ideally it would be nice to have a light extension spring attached to the free side of the thottle arm, which will return it to idle if the link pops OR if power is lost (like in a crash, but you'd need to use a low resistance servo like a 9253). However, this seems to put a side load on the throttle barrel which causes it to bind. The best way may be a l torsional spring wrapped around the barrel extension, but I haven't found a stock one that maintains a low torque throughout the sweep such that the servo won't get bogged.

Any one get this to work? Even if just for the crashing aspect, it would be nice not resorting to bring a blanket to squelch the funky chicken dance!


The sky is our canvas

PM  EMAIL  GALLERY  Attn:RR  Quote
10-12-2005 05:24 PM  12 years agoPost 15
MicroDOC

rrVeteran

Goleta, CA

My Posts: All  Forum  Topic

Playfair,
snip>
"The best way may be a l torsional spring wrapped around the barrel extension, but I haven't found a stock one that maintains a low torque throughout the sweep such that the servo won't get bogged."

That's exactly what I'm talking about. Much like the old return spring on a automatic choke. They are not that hard to custom make from spring wire. I don't have a picture of one to show you, but I've made plenty for other applications and they work great. I don't have one on my Hyper but was thinking about making one. I have not had any problems, but like they say, It's just a matter of time. I do know pilots that successfully use the push/pull system.
Ron…

Experience is something you don't get until just after you need it!

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-12-2005 07:23 PM  12 years agoPost 16
3Dx

rrElite Veteran

Monterrey NL

My Posts: All  Forum  Topic

No playfair, that’s not me it’s a post I so and joust copy, paste, so eleewhm can se the lucky he was!

PM  EMAIL  GALLERY  Attn:RR  Quote
10-12-2005 07:54 PM  12 years agoPost 17
Wa11banger

rrElite Veteran

Huntsville, Al

My Posts: All  Forum  Topic

Not good to reach in to one turning and burning but if you guys are ever faced with a 90 and holding on for dear life cuz of a hot start or you have just had a crash and its doing the funkey chicken do not mess around with attempting to get to your fuel line, just pinch off the exhaust deflector it will die post haste.. and is a much larger and easier target to get to when you are alone

Rick

Proud member of the Quick UK, Duralite Flight Systems, V-Blade, & KBDD team

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
11-10-2005 09:08 PM  12 years agoPost 18
Lazydays

rrNovice

Bakersfield CA

My Posts: All  Forum  Topic

I had an os arm break once and have never since given it much thought. You know just another broken part.
You guys raise a good point about a return spring so I am making that my next project.
Thanks for the safety thoughts it is help like this which will allow all of us to be safer.

PM  EMAIL  Attn:RR  Quote
11-20-2005 11:16 AM  12 years agoPost 19
eleewhm

rrNovice

Inglewood,California

My Posts: All  Forum  Topic

MicroDOC

interesting about the return spring thingy...how do i do it...?...show us...

PM  EMAIL  Attn:RR  Quote
11-21-2005 09:57 PM  12 years agoPost 20
Squirrlybird

rrVeteran

Suffolk, Va US

My Posts: All  Forum  Topic

Thank you eleewhm for posting this. It is always good to take something like this and turn it for the positive. I am glad to hear that you were ok after reaching under like that. Every now and then, I believe everyone has a moment where they find themselves doing or getting ready to do something of this nature thoughtlessly it is good that you can walk into this lions den for the good of all those who read this.

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 4036 views
Scorpion Power Scorpion Power
HelicopterSafety - RC Helis are not toys › Throttle linkage came off..!!...
 Print TOPIC  Make Suggestion 

 9  Topic Subscribe

Thursday, November 23 - 2:03 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online