I posted the following in another thread. If it IS accurate, and would be of use, I can add it to the calc:
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Originally Posted by Me
BTW: I don't think speed scales like the size does. From what I gather from this page, the formula for finding scale speed is:
1:1 speed = SQRT(scale) X scale_model_speed
So, if your 8th scale RC does 60mph, that scales up to SQRT(8) X 60 = 169.2mph.
Similarly, if your 10th scale RC does 90mph, that scales up to 284mph.
If someone can verify this, I can add this to the speed calc.  |
Just want to make sure the formula is accurate...
While I'm at it, no one has any information about the following?
Quote:
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Originally Posted by Me again
What I DO want to add is an alert of some kind which will tell the user if they are geared too high. There is a point in gearing where the motor is not spinning fast enough per mph for smooth low speed/take-off operation (around 1mph). Looking back, it seems I set my vehicles up for around 1000+ rpm per mph and everything runs fine. I'd like to know if there is a good rule of thumb regarding this, but would also depend on motor size of course.
On a similar vein, GriffinRU had provided some input on this topic a while back with regards to the minimum motor rpm needed for adequate back-EMF pulses from the motor. The idea was dropped because my simple mind could not grasp what he was talking about, but I think it would be worthwhile to have this kind of data available.
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