maybe a dumb question but....what are these?

[myspitfire]

Its a connection for a 'PANARD ROD'The same bracket was on my 'Sunbeam Tiger'260 V8.All you need now is the rest of the assembly.Good luck
Ken & Whitelightning(just a lowly Spitfire,but goes like a bat out-o-@^%!*? translated means zoom zoom zoom ;-)

 

[bugimike]

Its a connection for a 'PANARD ROD'The same bracket was on my 'Sunbeam Tiger'260 V8.All you need now is the rest of the assembly.Good luck
Ken & Whitelightning(just a lowly Spitfire,but goes like a bat out-o-@^%!*? translated means zoom zoom zoom ;-)

Mazda Powered??? /bcforum/images/%%GRAEMLIN_URL%%/jester.gif

 

[Hap Waldrop]

It looks like a anti tramp bar bracket. There's seems to be some confusion as what a anti tramp bar and a panhard bar is, I'll explain below.

Panhard bar: a lateral support devise, it will normally be a bar connected to the chassis and the rear end housing running parallel to the rear end housing. There are also other lateral support devices such as Watts links, wishbones, Mumford device, etc.

Anti tramp bars: Think of these a trailing arm to assist the leaf spring, in a Spridget 1/2 eliptical leaf spring car the, the leaf spring is both a spring and a trailing arm, the addition of anti tramp bars will keep the rear end stable under acceleration (not a big problem with a Spridget ) and under had braking to keep the leaf spring from waving under a load. Anti tramp bars mounting points would be near the front spring, close to same axis of the spring to keep from binding under suspension travel and on the rear end housing or spring brakcets.

Here's a photo of MGB race car with a anti tramp bars.
Hope this helps.

Oh well, the picture is on the home computer, will post when I get home.

 

[Hap Waldrop]

Here's the anti tramp bar pic I said I would post.

 

[Trevor Jessie]

And it looks like there is also a mount for a panhard there too.

 

[Hap Waldrop]

Here's a good example of Panhard bar, it the black bar that on one end attaches to the rear end housing and at the other end attaches to the chassis, it's the black angular bar, where it crosses the center of the chassis, in our cars, the the center of the rear end is a good reference point, that will set the roll center, the lower the roll center typically the better a sports or road racing car will handle.

The second picture is on what is problably the world's most expensive Bugeye race car, it was Huffaker built and has a horizontal Watts link, I got to drive this car in four races in 2005, it's the orange car pictured in my avatar

Both the panhard bar and the watts link do the same thing they control lateral movement of the rear end in high g-forces, this is why many guys autocrossing go to a panhard bar, side laods, in normal street driving it's not really necessary, but as side loads increase with racing, you need a lateral support device. The panhard bar is one of my favorite designs because it require very little sub structure to mount, that's one of the downfalls to the horizontal Watts link in my opinion, Mumford link same deal, way too much stuff needed, and at the end of the day you don't want any more weight than you have to.

 

[Hap Waldrop]

And it looks like there is also a mount for a panhard there too.

That's right Trevor, read the above two post and it wil show pictures of example of a panhard bar and how it attaches. The picture of the anti tramp bar is before we had everything assembled on the rear suspension of the Huffaker MGB.

 

[Trevor Jessie]

I've never seen a horizontal Watts. Interesting. I should get out more often. /bcforum/images/%%GRAEMLIN_URL%%/smile.gif

 

[racingenglishcars]

That top picture doesn't exactly look like a Spridget! /bcforum/images/%%GRAEMLIN_URL%%/jester.gif

 

[Hap Waldrop]

That top picture doesn't exactly look like a Spridget! /bcforum/images/%%GRAEMLIN_URL%%/jester.gif

Dang it you caught me /bcforum/images/%%GRAEMLIN_URL%%/smile.gif I don't have a good picture of a panhard bar on a Spridget, so I grabbed that off the web, but it's that same theory regardless of the car.

 

[Hap Waldrop]

Here's one on a Spridget 1/4 eliptic rear spring car, too much un-needed adjustment in my opinion, but there ya go /bcforum/images/%%GRAEMLIN_URL%%/smile.gif

 

[jlaird]

I found this discussion and the pics very intresting. Thanks Hap.

 

[Baz]

Agreed, very informative, thanks Hap.

 

[Branson]

DITTO!

Thanks for the insight Hap!

 

[Hap Waldrop]

Thanks guys, I have my moments from time to time /bcforum/images/%%GRAEMLIN_URL%%/smile.gif

 

[Westfield_XI]

If you compare the long rod in the last photo with the shorter one in the earlier you can really see how the length of the rod and the arc that it moves in can affect the lateral position of the axle. I guess in a leaf spring car it just loads and tries to distort the spring. My Westfield has 4 trailing arms and coil springs for controlled movement in a vertical plane and uses a 3 foot Panhard rod to restrain all the lateral movement. The trailing arms mount to the Spridget axle and the chassis with rubber bushings so there is a lot of freedom of movement. A short panhard rod on a long travel suspension could get quite squirrely as the axle moved left and right as it went up and down.

 

[GB1]

Thanks Hap

I have a speedwell panhard on mine, it is a bit on the mild side compared to your postings, but I did notice a difference in the handling with it on a 1/4" eliptical rear.

Pat

 

[Roger]

Panhard Rods should ideally be as long as possible and as horizontal ditto, under normal conditions.
This is to avoid lateral shift.
The photo is I guess at full droop, but there still seems to be a lot of angle there.
Maybe tuned for a specific circuit?

 

[racingenglishcars]

Well, you see Hap, that last picture is for a combination SCCA, Motocross car. Thus the adjustment for low or high suspension.

Actually Branson, I never considered buying a panhard rod. They are easily made up from a couple rose joints, extra nuts and a piece of steel tubing. Nicer if one side has left hand threads, for easy length adjustment. The mounting points are easily made up from angle iron. Just a little welding involved. That can be done with a OxyAct torch if necessary, else MIG. I will probably put one on my BE when finished.