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student_racing
08-19-2011, 10:51 AM
how to deciede upon the required amount of caster and kingpin inclination for achieving self aligning torque of front wheels and to improve traction and road feel...Is there any methodology ??

pritham
Camber Racing 09'10'11
SRM University
INDIA
student_racing
08-19-2011, 10:51 AM
how to deciede upon the required amount of caster and kingpin inclination for achieving self aligning torque of front wheels and to improve traction and road feel...Is there any methodology ??

pritham
Camber Racing 09'10'11
SRM University
INDIA
BillCobb
08-19-2011, 09:15 PM
Use a FREE body diagrahm to transmorph the upper diagonals of the steer axes components. Then add the un-free tire component vectors to the recipe, producing a medium well tierod load gradient. If the car is underaligning add some more broth, Overachieving: back it off a notch. I may have gotten that part wrong.

Or you could just build the car with a lot of holes in it and go with what you have when you run out of time.

A course in rigid body mechanics, algebra, welding and maybe relavantistic physics sure ought to help too.

Or sneak some secret spy pics of last season's winning car and copy it. What the heck, eh? Start looking for a contract driver with BIG biceps for insurance...
,4lex S.
08-19-2011, 10:02 PM
As a start, Steve Fox's Article (http://www.formulastudent.de/academy/pats-corner/advice-details/article/steves-box-of-tricks/) in Pat's Corner on the FSG website gives some general numbers for FS car steering wheel torque.

I am guessing that digging through some books on vehicle ergonomics would get you the same kind of info. Or you could do what my team tends to do, and experiment until you get a good idea of the right number.

From that point I guess it becomes a vehicle dynamics question.
student_racing
08-21-2011, 10:22 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by BillCobb:
Use a FREE body diagrahm to transmorph the upper diagonals of the steer axes components. Then add the un-free tire component vectors to the recipe, producing a medium well tierod load gradient. If the car is underaligning add some more broth, Overachieving: back it off a notch. I may have gotten that part wrong.
Start looking for a contract driver with BIG biceps for insurance... </div></BLOCKQUOTE>

TanQ BILLCOBB