Johan
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| posted on 12/5/07 at 06:59 AM |
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quote:
Originally posted by NS Dev
...instead of applying all that load through a nice spring and damper combination, you are now applying a percentage of it through a rigid metal strut
with no compliance whatsoever, which means that any undulation in the road surface is MORE likely to cause lockup and skidding as the load at the
contact patch will vary more rapidly and in a less controlled fashion........................
exactly why anti-dive is not a big hit in my opinion, unless:
quote:
Originally posted by kb58 as the nose drops, the tires camber in and you end up riding on the edge of your tires. In that case, yes, in
a straight line, anti-dive would help
And regarding
quote:
Originally posted by sebastiaan...2) weight transfer due to the different rake angle of the vehicle....
Sebastiaan
kb58 sums it up for me:
quote:
Originally posted by kb58...Oh sure, your CG cants forward maybe 1/8" but that's not going to measurably matter.
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NS Dev
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| posted on 12/5/07 at 09:56 AM |
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quote:
Originally posted by Bob C
Don't think so Nat - if you pivoted your wishbones on ballraces (perfect ones of course with no friction) you'd still get anti- dive but
nothing's locking up, it's not moving because the force is perpendicular to the available movement. So the suspension would still work for
bumps :^)
Bob
PS I never considered anti dive or squat for my car - the low CoG does the job nicely, even with very low rate springs!
That'snot how I meant Bob, though I see what you are thinking.
I meant that if one was to incline one's ball raced lower arm, upwards at the rear (as one does with anti-dive geometry) then that ball raced
wishbone/arm could exert an upwards thrust onto the car, thus taking some of the load off the spring, effectively jacking it at the front, hence the
lack of dive.
The arm would not be exerting the thrust in its pivoting direction, but at 90 degrees to that pivot direction. (and what is conventionally along the
cars centreline with no anti-dive geometry)
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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Bob C
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| posted on 12/5/07 at 02:47 PM |
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Hah - had another look & I guess I did get wrong end of stick. I still don't see a problem though - OK the slanty pivots resolve
deceleration into a vertical jacking force - this force is fixed & continuous, specifically NOT proportional to displacement, therefore will not
give rise to undamped oscillations - it's like fixing a balloon to the front of the car, won't affect it's dynamic behaviour at all,
just the ride height (????)
CHEERS
bOB
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sebastiaan
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| posted on 6/6/07 at 07:11 PM |
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quote:
Originally posted by Johan
And regarding
quote:
Originally posted by sebastiaan...2) weight transfer due to the different rake angle of the vehicle....
Sebastiaan
kb58 sums it up for me:
quote:
Originally posted by kb58...Oh sure, your CG cants forward maybe 1/8" but that's not going to measurably matter.
this is indeed true for our cars, since they are sprung very hard. See the rest of my post above. In short: just not worth the trouble imho...
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