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Unread 12-08-2011, 09:56
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Re: Advantage to six wheel drive?

Quote:
Originally Posted by PAR_WIG1350 View Post
Live axles also often use hubs for the wheels and sprockets, if not, they probably use heavier sprockets since now a hub must be incorporated into its design. I'm not saying that this has any significant effect on the acceleration, I'm just pointing it out.
So, a better representation would be:

Live-axle Mass = sprocket, hub(s), shaft, wheel, mounting screws
Dead-axle Mass = sprocket, wheel, mounting screws

BOTH approaches use bearings... the Live-axle would have at least _two_ friction points... and the Dead-axle would have only _one_ friction point...

We shouldn't underestimate the friction/drag created at each bearing-point on a Live-axel setup... if you insert a shaft into one secured flange-bearing and spin with your hand and then take the same shaft and insert into two secured flange-bearings and spin with your hand, you'll notice it takes more effort to spin the shaft... now times that by six wheels...

ALSO, the mechanics of the Live-axle setup causes more friction/resistance at the bearings because of the angular pressures caused by the shaft pivoting inside the bearings as the pressures on the attached wheel (at far end of the shaft) change...

I KNOW these are _minute_ differences (or, are they?)... but, it's fun to think this through...
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Last edited by Michael Blake : 12-08-2011 at 10:12.
 


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