Throttle Return Spring

[big kal]

On my X-Terminator buggy I run a Venom failsafe and haven't had any problems with it. Now, I want to run a TRS for extra insurance, but don't exactly know where to mount it and what tension spring is required. When I first got the buggy it had a TRS on it but it broke the first time I ran it. I don't even know what happened. Does anyone have any suggestions?

 

[Nitroaddict]

i know nothing about the XTM buggy, sorry. But regarding the tension - it has to be strong enough so that when u move the sevo while it is off, the spring can pull the servo back to neutral. u can hook the spring from the carb linkage to anywhere on the car that is stable.

 

[FastEddy]

You may also hook the spring to the servo horn and to a secure location on the other end.

As stated above the spring must be strong enough to return the throttle and or servo to the idle position.

 

[SDMaXX]

Just make sure the tension isn't to strong or else the servo will have a hard time opening the throttle and will get stressed.

 

[LarryA]

In turn, you servo must also be of a good enough quality to be able to overcome the spring tension without ending up stripping the gears. It takes a fair amount of tension to pull back a servo that has no power to it.

 

[Skipper]

You can find good spring of all various sizes at a local auto store, i did that on my maxx, and it works great, and i dont need a heavy failsafe, just a light spring.

 

[big kal]

Originally posted by LarryA
In turn, you servo must also be of a good enough quality to be able to overcome the spring tension without ending up stripping the gears. It takes a fair amount of tension to pull back a servo that has no power to it.

That's what I'm worried about. Right now I have Hitec servos and so far they've worked fine. I'll test out if they can hold up to spring tension.

 

[Kuma]

Like this?

 

[tkhoo]

This not the TRS.........this is manifold spring.:trout:

 

[SkyMaxx]

Look more closely. The top spring is a manifold spring, and the bottom spring is a throttle return spring. Nice try.

Kuma nice looking engine. I like the location of the return spring. Does it work well from that spot?

 

[tkhoo]

Where r the spring?? Still can't find it.:winnar:

 

[RobH]

yes, i'm digging in the thread graveyard, but i'm also doing my part and searching prior to asking my questions.

anyway, i have my throttle return spring sitting in my toolbox. i know it's not doing me much good there, but I'm at a loss as to how i'm supposed to make it work.

does anyone have a pic of a throttle return spring on a 1/8 scale buggy? i need ideas for placement. Eddy's idea to attach one end directly to the servo horn is a great idea, but where do you attach the other one. Kuma has a pic above, but, no offense, i don't like the placement. i feel the spring should run parallel to the motion of the throttle and not perpendicular.

second question: the spring has to be strong enough to pull the servo back if the power should go out. if it's too strong, however, the servo can't open the throttle. should i have a weak S3003 type servo on my throttle so it's easy for the return spring to pull it or should I have a strong servo that has enough power to overcome the spring? my current throttle/brake servo is the JR 85oz metal gear racing servo (comes with JR XS3).

thanks guys,
Robert

 

[robriguez]

In the photo above it looks like he has a rotary carb so the spring would be in parallel to the throttle travel.

Since breaking my front right suspension on my Inferno I got a throttle return spring on my buggy as well (or atleast I'm in the same boat you are Rob--its in my tool box )

Yes you maye have to go to a high tourque server on the throttle as well to over come the pull of the spring.....better safe than sorry. If I had a return spring on my buggy a week or so ago I would still be running it. Right now its siting in a box awaiting parts.......grrrr

 

[RobH]

doh it is a rotary carb! pps: anyone out there have a TRS setup on a slide carb that I can check out? I saw a pic on Christian's savage, but it was just too hard to make out. If I could hook the spring to the mill, it would be perfect.

 

[tkhoo]

I have one picture of this TRS but I can't attach the pic at this thread. email me to request for TRS pic. I send it to u by email. [email protected]

 

[jon2]

Hey TKHOO can you send me a pic as well? I need to install one on my TMAXX?

 

[tkhoo]

Ok, send me your email address. I send you the picture. I email address are [email protected]