Throttle spring? / failsafe?
 

Hey guys, i just wanted to know what u guys are using as a throttle spring in the even that the receiver battery dies or the throttle linkage comes disconnected? Is a spring strong enough for the throttle if it's still hooked to a servo or do u guys use something else? thanks!
Kyle

small rubber band. loop it from the HSN over the carb and hook it on the ball where your throttle linkage hooks up.

Get a set of small hairbands. They are a bit fuel proof and do work perfectly.

Be sure you have a smooth servo. Some standard plastic gear servo's are hard to turn by hand so a simple spring or rubber band will not work either.

A digital servo is a lot smoother and easier to rotate without power than it is with a standard servo. Standard servos take a lot more rubber-bands/springs to overcome its resistance.
You can get decent digital servos for a very low price (depending what you look at) online from hobbyking.

If the throttle linkage comes off no amount of springs or bands connected to the servo will stop it

I use these on .21 engines:
http://www.smg-speedshop.de/shop/pic...LMI20908_1.jpg

http://www.smg-speedshop.de/shop/pic...e/LMI20908.jpg

spring
 

thats sweet where do you gets these at , and do they put alot of tention on the linkage as far as the return part goes i really dont want to burn up servo's

Team Titan makes them:

http://www.team-titan.com.tw/t-spring.html

that's awesome! thanks a lot. i think that's what i'm going to go with.

The best I have found is the rolled lip of balloons http://www.partycity.com/product/bla...&navSet=110367 cut the part you blow into and use that. It's resistant to the chemicals and doesn't break like rubber bands etc. The key is having a servo in the throttle that can be returned back to center. Example airtronics servos I have used don't easily return to center. Make sure you bench test this.

These springs are also mounted standard on some kyosho and HPI cars. With a small search you can find the partnumbers.

Yep. Just the other day I was at a local hobby shop looking for a throttle linkage. The only thing they had that was long enough for my needs was some sort of HPI truck linkage kit. In the pack was a spring that looked just like that. Now I know what it is for. :D

Here the Kyosho part:
http://www.kyoshoamerica.com/74023-2...1--_p_779.html