Parallel leaf front suspension 1

[scrimshaw]

I am looking for tech. info on the geometry of parallel leaf front suspension but have not been able to find anything in depth on the internet. Can anyone recommend a good book on the subject, (that is still in print!)?

Thanks for any help.

 

[GregLocock]

I'm tempted to recommend Milliken's re-presentation of Olley's work.

Really the same rules apply as with rear suspensions, although I notice an interesting diversity of opinion about which end the shackle should go. FWIW I think behind the axle would be better for a front suspension.

Are you going to use a 3 link approximation or a non linear FEA model?

Do you have the SAE leaf spring design manual?

Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[scrimshaw]

Mr Locock
thanks for the reply. I agree the shackles should be on the rear. I could not think of any advantage for forward shackles so I be interested in hearing that theory.
As to your second question I have no idea. Hence my need for a book. I am trying to copy the set ups the early cars used with a solid I-Beam front axle, hopefully it is relatively straightforward, I don't want to go back to college. I am using the same set up on the rear.
No I do not have a manual - Posies will solve that problem for me.

Thanks again for any help.

 

[Fabrico]

The system is certainly still alive and well in the trucking industry. Perhaps the information you seek can be found there. I have yet to see shackles in the front on any big trucks. Jeep has certainly proven that front shackles work, but they haven't convinced many others to follow.

 

[GregLocock]

I imagine the case is much stronger for 4wd to have front shackles on the front axle.

Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[scrimshaw]

and the title of the book by Milliken is ...?

 

[GregLocock]

Google broken is it?

http://www.millikenresearch.com/olley.html

was the first hit.



Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[NormPeterson]

"Race Car Vehicle Dynamics", available at the SAE bookstore. It's probably worth it to get the set instead of the single volumes.

https://shop.sae.org/servlets/productDetail?PROD_TYP=BOOK&PROD_CD=R-146

Norm

 

[GregLocock]

RCVD is not much help on front leaf springs.

Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[NormPeterson]

17:16 and 17:16, Greg. Didn't this happen once before?

Re: RCVD, I guess that would put one in the position of applying the basics behind the text that was read rather than just the text itself - and right from the get-go.


Norm

 

[GregLocock]

Sure, I'd much rather do without Olley than RCVD, but there's a lot of nasty details with leaf springs - as we're finding out! I'd also emphasise the SAE leaf spring design manual, it is essential.



Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[scrimshaw]

Thanks for the replies

I am not sure Millikens book is what I was looking for. Isn't it more of a theoretical book? I was hoping to find more of a workshop book rather than a classroom book. I will get the SAE design manual though so it will at least look like I know what I am talking about when I order them.

By the way, Google is not broke, I just enjoy talking to you guys more!