Now i know most modelers know how to set up their throttle properly, but some wont, so i`ll give a quick explanation of how i go about it. It`s more important in helicopters because it means the throttle curve values correspond to exact barrel openings on the carb :afro:</p>

First thing to do is throttle trim to low if it`s an analog trim (JR) or in the middle if it`s digital ( futaba)</p>

The next thing is make sure the throttle stick is exactly at 50% !
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The next thing to do is fit a servo arm that will put it at 90deg to the linkage, use subtrim if you have to but only as a last resort :afro:
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After that you need to adjust the lenth of the linkage to get the throttle arm 90deg with the linkage. it`s not critical how much the throttle barrel is open on the carb at this point. Roughly half way is fine.
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The next thing to do is adjust the ATV`s on the TX so that the barrel just opens at full stick and just closes and no more at low stick. In this case it`s 130% at high and 88% at low stick. if it comes out at an odd number just add 1% to make it an even. it makes the next bit easier :afro:
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Now a bit of simple arithmatic.
130 - 88 = 42
42 divided by 2 = 21
130 - 21 = 109
88 + 21 = 109
Which means we set the ATV`s to 109% you get the idea :afro:
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All thats left to do is move the throttle stick to full and move the barrel on the carb to fully open and then simply tighten up the throttle arm on the carb.</p>

When you have done that little lot whan you move the throttle trim to half (JR) or 3/4 for futaba the barrel should be near enough to the correct opening for a good idle ( you may have to make small adjustments to the trim position to get the ideal idle) It means now your throttle curve will be perfectly matched to your carb i.e if the curve says 56% than you know that the barrel is exactly 56% open at that point and so on.</p>