Am I correct in understanding that A-arms in unsprung cars
are illegal and they ARE LEGAL if sprung?? As far as
fabricated goes every race car i ever worked on with a-arms
have fabricated a-arms. they are not stamped steel stock
looking things. Am I correct in believing that a fabricated
a-arm as typical on all race cars are legal if the car is
sprung and not legal if the car is not sprung??
Dave
Dan Warner wrote this...
If you read the rulebook. page 33, Sect III-20, the a-arm
referred to is
unsprung. Obviously, a sprung front suspension with the
proper materials and
geometry will be superior. The unsprung frontend as found on
Top Fuel and
Fed Mog cars has proven to be lacking in LSR.
Dan W
glen barrett wrote:
>
> Dave
> I should have stated that fabricated tube type independent front suspension
> arms are not allowed. We had failures at El Mirage and at Bonneville. Both
> vehicles were dragster type chassis. Because they are cheap to buy and not
> all are built under late specs. by NHRA or other specs. SCTA felt it would
> be safer to eliminate them. The same with the older NHRA approved rear
> engine dragsters, the are thin wall CM tubing and we have seen them crack
> and also fail. Hope this makes a little more sense.
> Glen
> ----- Original Message -----
> From: "Dave Dahlgren" <ddahlgren@snet.net>
> To: "glen barrett" <speedtimer@charter.net>
> Cc: "paulblandavon" <paul.blandavon@btinternet.com>;
> <land-speed@autox.team.net>
> Sent: Tuesday, February 13, 2001 7:59 AM
> Subject: Re: more liner layout
>
> > What???? Arms fold under side load??? Geez quit getting them
> > off a 54 Chevy then.. The g loadings on the salt are so
> > modest as to be not worth considering. What about all those
> > Indy car A-arms folding up? who is the one that came up with
> > this theory? We do not have tires that will contain any sort
> > of side load in the first place. When was the last time an
> > A-arm folded up on the salt? Cars that can generate the
> > highest lateral forces all seem to have a-arms. Do you think
> > you can exceed 2 g's lateral load with the tires we have
> > without the tire slipping on the salt? Joe Timney help me
> > here i am drowning in this one...
> > Dave Dahlgren (a very confused guy over this one!)
> >
> > glen barrett wrote:
> >
> > > Paul
> > > Only sprung wheels require shocks. Tripod or independent A-arm
> suspensions
> > > are not allowed as they are not load bearing as as Tubular axles. They
> tend
> > > to fold under if side loaded.
> > > Glen
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