Quote:
Originally Posted by andreazinno
Yes, I've used the calculator, but the problem is that a calculator doesn't said which is the best possible (theorerically) value given a specific motor.
I mean, I can enter different values and get a total gear ratio and, consequently, an evaluation about top speed. But how can I find the best ratio to be used ? Is, for example, a ratio of 13 : 1 suited for a motor like the 1717 ? Is the motor so powerfull that i can, lets say, lower the ratio down to 10 : 1 ?
I don't have any specific requirements about top speed. My only concern si to be able to use the motor at its best.
Bye, Andrea
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Some people shoot for a rollout ratio of 1:1 as a starting point. That usually gives you moderate speeds (a bit on the low side usually).
You can try this:
http://scriptasylum.com/rc_speed/_rollout_ratio.html
Or, just plug some numbers into the top speed calc and click the little gears icon in the results area. That will bring up a table and show the pinion needed for a 1:1 rollout in bold.