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From: |
"Steve Tyng" <stevet-at-stcharlesmd.com> |

Subject: |
RE: Speed eqation |

Date: |
6 Aug 2004 12:10:00 -0400 |

Reply-To: |
tanks-at-rctankcombat.com |

I don't know about your motor rpm but if you know the drive wheel rpm and diameter you can figure MPH with the following formula, MPH = ((RPM x (DIA x 3.1416)) x 60) / 63360 In Excel it would look like, =((A1*(A2*3.1416))*60)/63360 where A1 is RPM and A2 is drive wheel diameter. Remember diameter times Pi (3.1416) gets you your circumference. The 63360 is the number of inches in a mile. For a tracked vehicle you should add the thickness (times 2) of your track to the DIA variable in the equation for an accurate result. If the drive wheel is 4.5 inches in diameter and the track thickness is 1/2", add an inch to DIA (5.5" for this example). Steve Tyng > 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 > >

**Follow-Ups**:**RE: Speed eqation***From:*William and Melissa Johns <gizmology-at-gizmology.net>

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