Since you are using Victors, just make sure you are using the 24V version of the fans on them. They can be purchased seperately. You will burn out the 12V fans at 24V if that is what you originally bought on them.
Derek On Tue, Nov 4, 2008 at 9:20 AM, Matt <[EMAIL PROTECTED]> wrote: > > OOh, now I get it. I have belts on my tank as well so it won't take > long for me to upgrade. Thanks. > -Matt > > On Nov 4, 5:02 am, Steve Tyng <[EMAIL PROTECTED]> wrote: >> Matt, >> >> Very nice work on your Abrams (nice website also). >> >> On the EV amperage. The Cromwell is running 24v and I only have one >> 60A fuse in the circuit (in front of the controller). I've never >> stalled a motor or blown a fuse. I attribute that to two facts, my >> controller is current limiting and I have belts on my first stage >> reduction acting as a mechanical fuse. When building these things >> it's important to avoid high amperage conditions caused by a motor >> stall using techniques most appropriate for your mechanical and >> electronics mix. >> >> Steve Tyng >> >> On Nov 4, 2:26 am, "Chris. b" <[EMAIL PROTECTED]> wrote: >> >> >> >> > If you run the evs at 24v you will have a hard time stalling them on a >> > 9:1 ratio, your more likely to break your tracks or chains somewhere. >> > If you install belts you will never stall the evs under normal use. I >> > used to run evs 12v 9:1 with 60amp fuses, never blew one of them and I >> > didnt exactly take it easy on my tank. >> >> > Chris. b >> >> > On Nov 4, 9:43 am, "Derek Engelhaupt" <[EMAIL PROTECTED]> wrote: >> >> > > Wire >> > > Gauge >> > > 00 awg 400 amps >> > > 0 awg 325 amps >> > > 1 awg 250 amps >> > > 2 awg 200 amps >> > > 4 awg 125 amps >> > > 6 awg 80 amps >> > > 8 awg 50 amps >> > > 10 awg 30 amps >> > > 12 awg 20 amps >> > > 14 awg 15 amps >> > > 16 awg 7.5 amps >> >> > > These are the recommended maximum fuse ratings for the corresponding >> > > wire size. Using a smaller fuse than what's recommended here will be >> > > perfectly safe. >> >> > > I got this chart off of an electronics website. These maximums are >> > > designed to keep the wire from burning up (ie: starting on fire). >> > > According to this chart, my fuses are too big for my wire size. The >> > > M-01 motors Joe sells have blown 30 amp fuses in a stall. I'm >> > > thinking I need to put some smaller fuses in my tank. Yes you EV's >> > > will have a higher stall current at 24V, but they should also draw >> > > less amps at 24V under the same load at 12V. >> >> > > Derek >> >> > > On Mon, Nov 3, 2008 at 3:37 PM, Matt <[EMAIL PROTECTED]> wrote: >> >> > > > Well I thought that the speed controllers would be able to handle the >> > > > current more readily at 12 volts. As you can see, the tank is very >> > > > long and narrow, so it doesn´t do turns very well. at 24 volts, the >> > > > stall current is close to 200 amps. the speed controllers are only >> > > > rated at 120 amps continuous, and 200 amps for 2 seconds. The increase >> > > > in power would make the motors less likely to stall out, but to begin >> > > > with I just wanted a good, solid system to move the tank. >> >> > > > But, in case I do want to upgrade the voltage, what fuses would I use? >> > > > I was thinking 120 amp, but I am no expert on this stuff. Its >> > > > definitely at the top of the list of upgrades, along with a suspension >> > > > system. >> >> > > > Thanks for all of the imput, >> > > > -Matt >> >> > > > On Nov 3, 11:59 am, "Derek Engelhaupt" <[EMAIL PROTECTED]> wrote: >> > > >> Great looking tank Matt. Just a few questions. What was the >> > > >> reasoning behind gearing the EV's so low? Just curious since most of >> > > >> the EV folks use a 9:1 ratio on them. Secondly, did you have a reason >> > > >> for going with 12V instead of 24V? I'm asking since the motors are >> > > >> more efficient at 24V. I would think that if you ran them on 24V with >> > > >> a 9:1 ratio, you would still be able to make your climbing goals... :) >> >> > > >> Derek >> >> > > >> On Mon, Nov 3, 2008 at 1:44 PM, Chris Malton <[EMAIL PROTECTED]> >> > > >> wrote: >> >> > > >> > I have to say, I think it probably deserves its designation, even >> > > >> > if it >> > > >> > wasn't ready for it. >> >> > > >> > That is pretty cool. Well done Matt. >> >> > > >> > Chris >> >> > > >> > On 03/11/2008 15:55, Matt wrote: >> > > >> >> I think my Tank is finally ready for a designation number. You can >> > > >> >> go >> > > >> >> to my website atwww.freewebs.com/shootermiketocheckoutthe videos >> > > >> >> of it moving. >> > > >> >> Thanks >> > > >> >> -Matt- 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 -~----------~----~----~----~------~----~------~--~---
