I have the fans... and I'll be sure to use them when I upgrade.
-Matt
On Nov 4, 10:55 am, "Derek Engelhaupt" <[EMAIL PROTECTED]> wrote:
> 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/shootermiketocheckoutthevideos
> >> > > >> >> of it moving.
> >> > > >> >> Thanks
> >> > > >> >> -Matt- Hide quoted text -
>
> >> > > >> - Show quoted text -- Hide quoted text -
>
> >> > > - Show quoted text -- Hide quoted text -
>
> >> - Show quoted text -- Hide quoted text -
>
> - Show quoted text -
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