Re: [TANKS] trying to figure out rpm's / track speed

[Derek Engelhaupt <derekengelhaupt-at-rocketmail.com>]

Okie dokie, here's how it was explained to me and how mine works.  First, I start with my EV Warrior motor with a 10 tooth sprocket on it running at 4480 RPMs.  Then I connect that 10 tooth to a 40 tooth sprocket (4:1) reduction bringing my RPMs to 1120.  On that same shaft, I have a 9 tooth sprocket.  That 9 tooth is then direct connected to an 18 tooth sprocket (2:1) reduction bringing my final output RPMs to 560.  4480 divided by 560 equals a final reduction ratio of 8:1.  Hopefully that is right and explains the whole equation.  The number of teeth on the sprockets is directly proportional to the reduction.

Derek (dazed and confused for sooo long) Engelhaupt

odysseyslipways-at-aol.com wrote:

 okay, i'mgetting outthe paper and catalogs and calculators and and and...

 

anyway, I am a bit stuck on working out the rpm's in one spot............

 

the motor's max rpm is 2600 rpm -at- 24vt

 

motor gear 10 tooth to first gear 36 tooth

second gear 12 tooth (on same shaft as gear one) to axel shaft 36 tooth with a ttrack drive sprocket of 3.9" / 9.906 cm and that will have a cir. of 12.25"/31.12 cm

 

anyone have a easy way to figure this out? just trying to see if i have a decent rpm/speed range

 

 
-----Original Message-----
From: bill-at-gizmology.net
To: tanks-at-rctankcombat.com
Sent: Sun, 13 Aug 2006 12:23 PM
Subject: Re: Casting parts [TANKS]

This might be helpful: 
 
http://www.gizmology.net/greensand.htm first of several pages about casting aluminum in the back yard 
http://www.gizmology.net/stovetop.htm or casting zinc/aluminum alloy in the kitchen 
 
B. 
 
At 03:27 PM 8/10/2006, you wrote: 
>Anybody out there casting parts in aluminum? 
>I'm thinking about giving it a go, so if you are please share your >experiences. 
> 
>David "any excuse to work on not working on my tank" Cansler 
> 
> 
 
-- 
 
"All cats are possessed of a proud spirit, and the surest way to forfeit the esteem of a cat is to treat him as an inferior being." -- Michael Joseph 
 
 

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