Hi Neil, Yes, the mount is both part of the circuit and the heat-sink, the motors are case grounded, that’s why each mount is insulated from the chassis. Each motor is nominally 1500w though that’s at 24v, I'm going to start at 12v but if I need more torque I'll up it to 18v, or up to 24v. My battery bay is 225mm wide, 210mm high and 520mm long maximum, so it'll either take 2 x 75Ah 12v in series for 24v or parallel for 12v, or 3 x 85Ah 6v in series for 18v. It's a trade-off power v run-time. I'll decide when I run a motor under a decent load. I hope 12v will be fine, then I should get a whole day's battle on 1 charge, (assuming I don't go flat out all day!)
The gearbox is the easy bit, these will be HTC belt to a 22 tooth spur gear driving to a 220 tooth gear on the drive sprocket, 10:1 reduction in 1 step! I have to use a belt as each motor must be electrically isolated! That help? Regards Phil D. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of neroc Sent: 23 August 2010 20:24 To: R/C Tank Combat Subject: [TANKS] Re: Motor Mount & ESC setup. Can you give some explanation for the electricly dysfunctional members , like me ?? I have questions :- 1 /does the metal mount double up as part of the circuit and as a heat sink ? 2 /what wattage are those beasts ? 3 /just looking at them I imagine you will be fine at 12v ,why do you think you`ll require 18v ? You have a lot of work to build a gearbox to get a final output to 400ish rpm but I think your the man to do it. I like the look of your progress . Neil R On Aug 23, 7:50 pm, "Phil Downs" <[email protected]> wrote: > Hi all, > > Completed the first motor mount and ESC set-up, looks OK and rather > surprisingly seems to work! > > I've run the motor up to 10A 24v on a small battery and nothing got remotely > warm before the battery died, next step is to set it up on a big battery and > load the motor shaft. > > Looking at the available space in my hull, I'm thinking of running at 18v > though at 12v the motor is running nicely at about 4000 rpm (at 24v it gets > to about 8000 rpm - a bit too fast and very battery hungry!) > > If the cobbled together ESC holds up, then I'm a happy bunny, a 200A ESC for > less than £10.00 ;-) > > Regards > > Phil D. > > Mount3.jpg > 96KViewDownload > > Mount1.jpg > 106KViewDownload > > Mount2.jpg > 100KViewDownload -- 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 -- 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
