Newbie with a few questions. - RCCanada - Canada Radio Controlled Hobby Forum
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Nitro RC Car and Truck Discussion Discuss nitro RC vehicles

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Old 10-17-2013, 04:22 PM   #1
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Newbie with a few questions.

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Hey guys, new to the hobby and picked up this used little truck. It is an Exceed-RC Infinity VX.18 motor. Just curious on a few things:

1: Once I seem to fine tune it and it runs for quite awhile actually pretty darn well. Next time I take it is a bear to start and keep running till I start tuning once again...Are they all like this? I know the outside temp plays a role, but it takes a good 20-30 minutes to get going and tuned to where a guy can actually start having a bit of fun.

2: The steering seems way, way tooo sensitive to where it is very hard to control in a straight line. Is there a wy to solve this or just keep practicing?

3: There is an adjustable rod that runs from the throttle servo and is mounted up above the transmission. I`ve rattled my brain looking at it, and it just doesn`t seem to do or solve anything. What could it be for?

4: How do you stop the truck from dying when you flick the throttle backwards to apply brake? Doesn`t really seem to have the best for a brake type deal, but if you flick the throttle too far kills the truck.

In the pic, you will see this adjustable throttle linkage rod. It is about 1/2-3/4" to the right of the antennae

Thanks guys,Darcy
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Old 06-03-2014, 01:21 PM   #2
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Re: Newbie with a few questions.

I can answer some of your questions, but not all...

The lever/rod (from servo) above the transmission is probably the brake lever.

Adjust idle speed on the carb, not the linkage. The pen spring on the throttle side linkage allows the throttle/brake servo go beyond the idle stop of the carb in order to apply the brakes and allows the engine to continue running.

Steering sensitivity. Try using a linkage hole closer to the servo shaft if you can keep the adequate amount of travel at the wheels. It is always best to set up the linkages mechanically to get the required throw at the wheels with nothing left over for servo throw. That way you get the most torque advantage and resolution from the servo, but sacrifice the speed, which it sounds like you don't need anyway. If the mechanical setup is good, you might be able to dial in some "exponential" in your computer radio to soften the servo response in the "middle". If not a computer radio, trim mechanically by changing linkage lengths and then fine tune center with radio trim.

Also check for "toe" on the front wheels. Too much either way will make it wander all over the place.
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Last edited by wymbly1971; 06-03-2014 at 01:44 PM.
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