Steve: To figure out how fast your tank will go: take the diameter of your track drive sprocket and multiply by 3.14 and that gives you the distance the tank will move for each revolution of the drive sprocket.
Track sprocket diameter(in inches) X 3.14 = inches the tank will travel for each revolution of the sprocket. For my tank: track sprocket diameter = 3 inches 3 x 3.14 = 9.42 inches per revolution of the sprocket. my motor goes 550 RPM, so the tank will go 9.42 inches 550 times each minute 9.42 X 550 = 5181 inches in a minute 5181 inches X 60 minutes per hour = 310860 inches per hour 310860 inches per hour divided by 12 inches per foot = 25905 feet per hour 25905 feet per hour divided by 5280 feet per mile = 4.9 miles per hour So my tank should go about 4.9 miles per hour. Just more mathamatical B.S. Mark On Feb 17, 4:32 pm, steveh <[email protected]> wrote: > Mark, thanks for the response. Since I am not sure about the torque, > let me see if you can answer my question. The unit I am building > Is projected to weigh in at around 175lbs. I only need to be > able to achieve a speed a little faster then walking. Do you > think that motor would be sufficient? > Thanks > Steve > > On Feb 17, 5:11 pm, Mark_123521 <[email protected]> wrote: > > > > > Steve: > > > Those are electric bicicle motors, 450 watts, 24 volts. > > >http://www.electricscooterparts.com/motors.html#top > > > They have a 7 or 8 to 1 gearing built in. > > 550 RPM and 4.5 inch pounds of torque per amp. > > > Mark > > > On Feb 17, 12:11 pm, steveh <[email protected]> wrote: > > > > Mark, what kind of motors are those in the pictures? > > > Thank You > > > > On Feb 11, 10:08 pm, Mark_123521 <[email protected]> wrote: > > > > > Check out the progress. > > > > I have just completed a bar with my suspension and road wheels. > > > > The suspension has a travel of 1.25 inches. > > > > Each wheel has an initial force of 10 pounds and a fully retracted > > > > force of 14 pounds. > > > > See how the road wheels engage the track guide tabs. > > > > >http://i192.photobucket.com/albums/z65/mm123521/HPIM0726.jpg > > > > >http://i192.photobucket.com/albums/z65/mm123521/HPIM0725.jpg > > > > >http://i192.photobucket.com/albums/z65/mm123521/HPIM0724.jpghttp://i1... > > > > > Mark- Hide quoted text - > > > > - Show quoted text -- Hide quoted text - > > > - Show quoted text -- Hide quoted text - > > - Show quoted text - -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat
