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Old 09-15-2011, 09:54 PM   #1
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Default 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
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Old 09-15-2011, 10:08 PM   #2
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small rubber band. loop it from the HSN over the carb and hook it on the ball where your throttle linkage hooks up.
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Old 09-16-2011, 12:46 AM   #3
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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.
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Old 09-16-2011, 05:32 AM   #4
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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.
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Old 09-16-2011, 06:06 AM   #5
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Originally Posted by brothainchrist0 View Post
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
If the throttle linkage comes off no amount of springs or bands connected to the servo will stop it
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Old 09-17-2011, 12:16 AM   #6
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I use these on .21 engines:


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Old 09-17-2011, 11:29 AM   #7
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I use these on .21 engines:


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
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Old 09-17-2011, 12:23 PM   #8
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Team Titan makes them:

http://www.team-titan.com.tw/t-spring.html
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Old 09-17-2011, 09:08 PM   #9
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I use these on .21 engines:


that's awesome! thanks a lot. i think that's what i'm going to go with.
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Old 09-17-2011, 09:41 PM   #10
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Originally Posted by brothainchrist0 View Post
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
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.
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Old 09-18-2011, 03:54 AM   #11
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These springs are also mounted standard on some kyosho and HPI cars. With a small search you can find the partnumbers.
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Old 09-18-2011, 04:46 AM   #12
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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.
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Old 09-18-2011, 07:31 AM   #13
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Here the Kyosho part:
http://www.kyoshoamerica.com/74023-2...1--_p_779.html
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