Aurora Rod Ends

[Frank]

We just did some more duestructive testing on rod ends, this time Aurora. http://fsae.com/groupee_common/emoticons/icon_smile.gif

I'm fairly sure most teams use Aurora's RAM-4 rod ends. (1/4" thread, 1/4" bore)

I was wondering, has anyone used RAM-3? (3/16" thread, 3/16" bore)

Comments much appreciated

Frank

[This message was edited by Frank on February 19, 2004 at 03:09 AM.]

[SkiEricSki]

By chance you didn't do any axial load tests, did you?

[Frank]

no,

just ultimate radial static (3mm/min)

RAM-4 = 6200lbs (27.6KN) tensile

hard to find the onset of yielding, but i'd say about 4490lbs (20KN)

[Denny Trimble]

We use those on our steering tierods. How bad were the test results? http://fsae.com/groupee_common/emoticons/icon_smile.gif

University of Washington Formula SAE ('98, '99, '03, '04)

[Frank]

we havn't tested the RAM-3's yet (will do soon)

but I suspect very strongly that they'd be good enough.... provided they don't see bending (from poorly designed hardware creating bending loads, or from idiots picking the car up by wishbones)

[awhittle]

It is at least difficult to design All bending loads out of the design of most adjustable suspension pieces. These vehicals generate about 1.5 gees in all 4 directions (NSEW) I like to assume the entire weight of the car end up on one one corner times 2 gees times a 3 safety factor. Say (500+200)*2*3=>4200 lbs at the tire patch. Now if we hit a bump in this corner and the shock hydrolic loads come on...

Hope this helps

AW

[Frank]

we had an old rugged car that had around 1500N on the pushrod at rest.

Launching into a bump (a "glad thats not my car" bump) saw about 10000N.

Strain guages logged at 300Hz.

I can't tell you what the damping ratio was, but i'd say it was "normalish".