Re: New video of my Centaur [TANKS]

[JOHN PITTELLI <jplily-at-yahoo.com>]

Brendan,
         At 6 to 1 , EV warriors at 24 volts will be
way too fast. Currently I believe that Squire Tyng is
running the Cromwell at 9 to 1 and 24 volts and has
successfully jumped 4 scale Hummers. When I was
testing my Comet at 24 volts I was using 13 to 1 and
had plenty of speed and plenty of torque for turning.
The big question is, how fit is your father? After all
, he will be on the field with his Marder and an hour
of constant movement can be quite draining.Look
forward to seeing both of you on the field.

John


--- BrendanKotlanger-at-aol.com wrote:

> future tank
> The next tank for my dad is designed to be about 85
> lbs.  I have not received 
> an answer about what gear reduction I should use on
> it.  At 6 to 1, it would 
> put about 450 inch lbs of torque on the sprocket at
> 650 rpm. at 8 to 1, It 
> would have 600 inch lbs. of torque at 500 rpm.  This
> is a rough answer 
> considering I did the calculations 3 weeks ago.  It
> will be powered from ev-warriors at 
> 24 volts.  This will be a 31 inch tank.  Each track
> will be a tts 3 inch wide. 
>  4 road wheels on each side.  the drive sprocket
> will be 4.5 inches diameter. 
>  Can I get away with a 6 to 1 reduction without
> stalling my motors?
> 
> current tank
> My current tank uses 2 npc-02446 motors with an npc
> gear box that connects to 
> a 3 to 1 chain drive reduction #35.  The drive
> sprocket is 4 inch diameter.  
> My current tank runs at 24 volts with 18 ah in the
> loop.  The motors get warm 
> after about 5 minutes of runtime.  I still need to
> do a "kill the batteries" 
> runtime test on it.  The sprocket is calculated to
> spin at 500 rpm without 
> resistance.  I get the video as soon as I do the
> test.
> 


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