Re: Speed eqation

["Nick Barnes" <npbarnes-at-sympatico.ca>]

Thank you Steve and Flier. 

Nick Barnes

----- Original Message ----- 
From: "flier" <FLIER-at-sbcglobal.net>
To: <tanks-at-rctankcombat.com>; <tanks-at-rctankcombat.com>
Sent: Friday, August 06, 2004 1:00 PM
Subject: Re: Speed eqation


> Hey Nick,
> 
> Circumference of the circle times the RPM.  
> pi*D*RPM
> 3.14 * 4.125" * RPM = speed in inches/minute
> 
> There are 63,360 inches in a mile so,
> 
> (60 * (3.14 * 4.125" * RPM))/63360 gives you the 
> speed in miles per hour.
> 
> At 400 RPM you're talking 5mph...
> 
> Somebody check my math!  
> 
> 
> 
> --- Original Message ---
> From: "Nick Barnes" <npbarnes-at-sympatico.ca>
> To: <tanks-at-rctankcombat.com>
> Subject: Speed eqation
> 
> >Ok so here i am looking at my motors tring to figure 
> out how fast or =
> >slow my tank will go  ?        If i know the drive 
> wheel size is 4 1/8 " =
> >and the speed of my motor  ( x ) rpm . What is the 
> formula to figure out =
> >MPH? Do i need more info to determine mph ? Thanks.
> >
> >Nick "gotta work on my typing " Barnes
> 
>