Re: [TANKS] Re: Suggestion: New How to motor article on website.
A tank rolls on its road wheels, which in turn roll on the inside surfaces of the track links. The drive sprocket pulls (directly if rear-drive, via the rear idler if front-drive) on the portion of the track behind the last road wheel. Since the track is pinned to the ground by the weight on the road wheels the net effect is to move the tank chassis forward. The rate of movement is determined by the number of track links the drive sprocket can affect over time. If the drive sprocket is toothed it's a simple calculation (number of teeth x track link length including space). If the drive is not toothed you could wrap the track around it to get a reasonable approximation. Another approximation is to calculate the diameter of the drive drum. Adding twice the track thickness to the drive drum would give the outer circumference of the track as it passes around the drum (ignoring any non-circularity due to flat links) but be aware that the space between links is typically greater in this condition than on the ground where it counts. On Friday, October 18, 2013 7:33:51 PM UTC-4, odyssey...@aol.com wrote: what are you measuring by doing that, i don't understand the measuring the tracks. i know we did talk about the gearing down of the motor, what the final rpm's of the sprocket shaft would be plus the sprocket's dia would give you an idea as to the tanks overall top speed was In a message dated 10/18/2013 3:34:04 P.M. Eastern Daylight Time, mxl...@cox.net javascript: writes: I seem to recall a discussion a LONG time ago to the effect that we should calculate the number of track links that go around the drive wheel and the track link distance on the ground, since that's what actually moves the vehicle. -- -- 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 --- You received this message because you are subscribed to the Google Groups R/C Tank Combat group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[TANKS] Re: Suggestion: New How to motor article on website.
I seem to recall a discussion a LONG time ago to the effect that we should calculate the number of track links that go around the drive wheel and the track link distance on the ground, since that's what actually moves the vehicle. On Friday, October 18, 2013 1:39:43 PM UTC-4, TyngTech wrote: ... Include the diameter of the track drive wheel and thickness of your tracks (for MPH calculations). ... -- -- 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 --- You received this message because you are subscribed to the Google Groups R/C Tank Combat group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
[TANKS] Re: Suggestion: New How to motor article on website.
T???-MXL1 Strv 103 under construction Motor: - Shenzhen Unite Industries Co., Ltd. - MY106B4M6-350W - 24V 350W - rated speed 2650 RPM; another source gives 3514 no load, 3087 @ max. eff., 2858 rated, 2599 @ max. torque - 11-tooth #25 sprocket 1st stage: - 72-tooth #25 gear - 2 V-dimension pulley 2nd stage: - 1.75 (or 1.5 or 1.25, not yet selected) V-dimension pulley - 11-tooth customer drive sprocket Track spacing: 1.07 By my calculations the 1.75 pulleys will give a speed of 5.16 mph at the rated speed of 2650 RPM. -- -- 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 --- You received this message because you are subscribed to the Google Groups R/C Tank Combat group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [TANKS] Re: Suggestion: New How to motor article on website.
The SU100 is 1 Montgomery. -Original Message- From: TyngTech steve...@gmail.com To: rctankcombat rctankcombat@googlegroups.com Sent: Fri, Oct 18, 2013 1:39 pm Subject: [TANKS] Re: Suggestion: New How to motor article on website. To current battlers, It would be cool to develop a database of motor and reduction data for the current vehicles. If you want to contribute, please provide the motor type and voltage your running with. If you know the published RPM and torque numbers for your motors, include those. Include the number of sprockets and tooth counts in your reduction. If your running v-belts, I'll need the pulley diameters. Include the diameter of the track drive wheel and thickness of your tracks (for MPH calculations). I'll enter the data into my spreadsheet My spreadsheet calculates theoretical outputs based on published motor data. If you know the measured actual speed of our vehicles. I can include an efficiency calculation which would be cool. Steve Tyng On Friday, October 18, 2013 1:21:58 PM UTC-4, TyngTech wrote: I have an Excel spreadsheet I use to figure ratios, RPM, torque, and speed. I'll clean it up a bit and post to the list this weekend. Steve Tyng On Friday, October 18, 2013 10:27:37 AM UTC-4, morrdubay wrote: something along this line would be nice. I am one of them newbies atm and am currently having trouble with motors to gears abd working out the ratio's. At the same time im making things worse for me cause im working on 3 tanks at the same time 2 are my friends but im kinda the research guy. We are building a t34(005 clone), a panther, and a hetzer. -- -- 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 --- You received this message because you are subscribed to the Google Groups R/C Tank Combat group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- -- 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 --- You received this message because you are subscribed to the Google Groups R/C Tank Combat group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [TANKS] Re: Suggestion: New How to motor article on website.
what are you measuring by doing that, i don't understand the measuring the tracks. i know we did talk about the gearing down of the motor, what the final rpm's of the sprocket shaft would be plus the sprocket's dia would give you an idea as to the tanks overall top speed was In a message dated 10/18/2013 3:34:04 P.M. Eastern Daylight Time, mxly...@cox.net writes: I seem to recall a discussion a LONG time ago to the effect that we should calculate the number of track links that go around the drive wheel and the track link distance on the ground, since that's what actually moves the vehicle. -- -- 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 --- You received this message because you are subscribed to the Google Groups R/C Tank Combat group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
