boatnut

Can some give me info about how a failsafe works.
I had experience with my big swamp buggy running away {almost]
It started getting intermitent on the controls, so I turned it toward the dock I was standing
on. While coming straight at me on return, I turned the throttle down to idle It stayed almost
wide open I jumped back waiting for the train wreck I knew was comimg lucky the dock was only about 6 in
above water. The boat hit the dock and went airborn,went 4 ft. high and about 20 ft., clearing the dock and
made a beautiful landing went into the grass on the bank where i was able to walk over and shut it down.
Upon examination, the battery wire had parted, I was lucky
I don't know if a failsafe could have prevented this or not, seeing as how the battery connection was broken.
Any way I don't want do that again. Help.
Thanks guys and gals Im surethere are some rewading this.


Having this much fun must be illegal.
.

boatnut

 Sorry about the spelling,

What I meant is I am sure there are ladies out there that injoy rc ing.

crispyspa

A failsafe would have done nothing to help that crash since the battery came disconnected.

Here is something we all should have connected to our throttle servos. http://www3.towerhobbies.com/cgi-bin...?&I=LXUP98&P=7

DJLaPalme

Are there any failsafes that will operate on loss of battery too(loss of signal)? If not it should not be that hard to design and it would be a good idea for all r/cer's to use except maybe a tank or a rock crawler. Even though a 1/6 or 1/4 scale tank could do a lot of damage if running rampant. A capacitor or separate battery for the fail safe should work. Dennis

cheesewizz69

Are you looking for something like this for a gasoline engine?

http://9x4br.64n2f.servertrust.com/P...ctCode=ACC1S15

R.J. West

Here's probably what your looking for. Theres other brands out there but I grabbed this from Tower Hobbies real fast for ya.....www3.towerhobbies.com/cgi-bin/wti0001p

cheesewizz69

I don't think those will work. He is looking for something that shut's down an engine in the event of a power loss. I could be wrong but I have one in my toolbox and when power is cut any servo that is connected to it stays at whatever position it's at the time of the power loss.

crispyspa

Yea, he's looking for something that, in the event of a physical disconnection of the battery, the engine will kill. I still think the return spring is the easiest and most economical. If it works for RC cars, why not boats?

boatnut

Crispyspa
Would't a spring tension pulling on a servo all the time be damaging.
In order to pull a servo back under power failure, it would have to be strong.
 Just wondering, thanks guys for the help





         Having this much fun must be illegal

boatnut

Crispyspa
Would't a spring tension pulling on a servo all the time be damaging.
In order to pull a servo back under power failure, it would have to be strong.
 Just wondering, thanks guys for the help





         Having this much fun must be illegal

carlosam

+ 1 [X(]I agree

Crispyspa

Excuse my ignorance, but this spring ( http://www3.towerhobbies.com/cgi-bin...?&I=LXUP98&P=7 ) I believe it is used in automotive carburetor, but it is possible that you could show some picture of how to mount this system to be used in case the battery disconnect? I know that if the battery disconnect the servo will be stalled in the last position.

crispyspa

I'll do one better...I made a video. I believe that the spring I used was a Team Losi throttle return..but they all do the same thing.

[youtube]http://www.youtube.com/watch?v=7WxRjdaIn54[/youtube]

carlosam

crispyspa

Congratulations, I admire more and more for your patience and experience

After several people disagree, including me, because I could not see how the spring, you saw the video and posted for everyone.

carlosam

crispyspa ,

My only question is if I disconnect the battery's servant will return to closed position carburetor? When you made the video, you turned off the battery?

crispyspa

Yes.




I had my daughter unplug the battery.

carlosam

Good, very good,
On Monday I will see if I get this spring, therefore, been through a similar situation.
Again thank you
He's the kind of guy who shows what he's made of.

boatnut

  Crispyspa,
Thank you for the vidieo, seeing is believing.
? Would you still use a failsafe in addition,
as it would seem with power and no signal the servo
would not return to shutoff., if power was still on, A
failsafe would shut throttle down
wondering,
Thank you for answering my dumb questions.
Its people like you who save the average guy
a lot  off mistakes. Thanks for your experiance

crispyspa

I also use failsafe. I do admit that I don't have throttle returns is all my boats though. [sm=disappointed.gif]

There are no dumb questions, and I'm more than happy to help out.