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11-20-2008, 11:10 PM
| #1 |
| Quarry Creeper Join Date: Aug 2008 Location: Gadsden, Alabama
Posts: 198
|  Question about front & rear caster on a custom rock-crawler with 4-wheel steering...
Ok, I am building a custom super-class crawler with four wheel steering, and was wondering about building-in caster on both ends. I know all about caster, but I am unsure if it is necessary on a purpose-built crawler, especially in the rear. Is caster needed on the front-end of a dedicated rock-crawler? I mean, does caster even help the steering of a super-slow rock-crawler? If caster does help on a crawler, would it benefit from caster in the rear as well? If caster helps, I will design in some caster adjustment on the custom axles I am building. Thanks in advance for all the help you guys can provide!  |
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11-20-2008, 11:22 PM
| #2 |
| Rock Crawler  Join Date: Nov 2005 Location: dallas
Posts: 866
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Zero caster works best  |
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11-21-2008, 08:57 AM
| #3 |
| Quarry Creeper Join Date: Aug 2008 Location: Gadsden, Alabama
Posts: 198
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Ok, cool...thanks!  |
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11-22-2008, 03:29 PM
| #4 |
| Newbie Join Date: Jan 2007 Location: springfield
Posts: 49
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even though 0 deg caster is what we want if you make them have caster adjustments then you can adjust your pinion angle
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11-22-2008, 06:29 PM
| #5 |
| Quarry Creeper Join Date: Aug 2008 Location: Gadsden, Alabama
Posts: 198
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Yea, I think I will design in a range of caster adjustment from 20º negative to 20º positive, in 5º increments.
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11-22-2008, 08:37 PM
| #6 |
| Quarry Creeper Join Date: Apr 2005 Location: South Jersey (Cherry Hill area)
Posts: 240
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-5º caster is where almost all verticals steer best 1:1 and RC... my 2 pennies
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11-22-2008, 11:44 PM
| #7 |
| I wanna be Dave Join Date: Feb 2007 Location: BFE, NV
Posts: 2,324
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Not sure about the rear but up front you definately want/need some negative caster (top of the "c" leaning to the rear). And yes it come into play even at low speeds.
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Linear Mode
