Old stuff, http://www.rctankcombat.com/archive/2004-08/msg00043.html
Steve Tyng On Feb 17, 7:48 pm, Mark_123521 <gatlinggunm...@sbcglobal.net> wrote: > 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 <ste...@avdesigners.com> 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 <gatlinggunm...@sbcglobal.net> 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 <ste...@avdesigners.com> wrote: > > > > > Mark, what kind of motors are those in the pictures? > > > > Thank You > > > > > On Feb 11, 10:08 pm, Mark_123521 <gatlinggunm...@sbcglobal.net> 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 rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat-unsubscr...@googlegroups.com Visit the group at http://groups.google.com/group/rctankcombat
