Blade-type adjuster for Anti-Roll bar....

[RacingManiac]

Ok guys, maybe you can help me out here...

I am looking for a place to buy these blade adjuster, one that'll be suitable for FSAE car, so far I've only found HRP ones and they are 9 inchs long(I don't think our roll bar is that long for one end of the car), and thats clearly for very "full size" racing car....any place you know or even where you might have bought yours from will be greatly appreciated....

[Cement Legs]

Once you know what you want for performance from your anti-roll bar I think it is one of those things you can make much cheaper. It took me a while to finally understand how I wanted to fit ours to the frame but now that that part is done the rest is just material properties.

I would say the same thing about a brake balance bar. We just spent around $50-60 US on one and I think I could make one in 2 1/2 hrs for < $20. Anyway, its a fine line between building everything to save money and buying everything to save time. That reminds me I'm running out of time.... http://fsae.com/groupee_common/emoticons/icon_wink.gif

[Frank]

err.. i disagree cement legs

for an "effecvtive" blade, you are forever chasing the limits of tensile strength

think 4340 52Rc and shot-peened, yes expensive

Frank

[RacingManiac]

where can I find one though, if we were to make one we(like we did before), we won't make a blade one but I think this setup can save some packaging trouble as well....although that depends on how big the one we end up finding....HRP has one for sale for 300 usd, and that's 9" long.....a bit big....

[Denny Trimble]

So, you want an ideal blade-type ARB to fit your particular FSAE car, but you don't want to make one? And, you want us to find it for you?

[RacingManiac]

not an "ideal" necessarily, just any place where they are selling it....

just can't seem to find them...

[Denny Trimble]

Sorry for giving you the hard time, but it seems like the ideal project for a mechanical engineering student. We've designed and made our own forever, although we just moved to the blade type last year.

Do some FEA, machine some 4340, get it heat treated, and off you go. You'll learn a lot.

[rwolcott23]

We made ours for the first time this year and chose Titanium due to its high strength and low modulus. We derived a contour that maximizes deflection by keeping constant stress over the length of the cantilever. This was actually very simple and only took a few minutes. The machining was done via wire EDM.

By going this route we were able to beat the steel's design deflection by a fair margin. It will be interesting to see how well it works.

Bob

[EliseS2]

Originally posted by Denny Trimble:
Sorry for giving you the hard time, but it seems like the ideal project for a mechanical engineering student. We've designed and made our own forever, although we just moved to the blade type last year.

Do some FEA, machine some 4340, get it heat treated, and off you go. You'll learn a lot.

Our car had small blade type anti roll bars about 1.5 inches long. We machined them from 4340 and heat treated them. During the endro the rear anti-roll bar broke. It broke because the team member that machined them did not leave a great surface finish. So just a word of warning to worry about surface finish and other factors for fatigue.