cca1p1 1701 molnar short long arms

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Short long arms suspension (SLA) Is also known as an unequal length double wishbone suspension. The upper arm is typically an Aarm, and is shorter than the lower link, which is an Aarm or an Larm, or sometimes a pair of tension/compression arms. Double wishbones are usually considered to have superior dynamic characteristics as well as loadhandling capabilities, and are still found on higher performance vehicles. Advantages: when the vehicle is in a turn, body roll results in positive camber gain on the lightly loaded inside wheel, while the heavily loaded outer wheel gains negative camber. provides the engineer more free parameters, suspension can be tuned easily and wheel motion can be optimized They also provide increasing negative camber gain all the way to full jounce travel, unlike the MacPherson strut, which provides negative camber gain only at the beginning of jounce travel and then reverses into positive camber gain at high jounce amounts. Disadvantages: braking and cornering forces are higher, needs better burshing into the chassis. poorer kingpin geometry bigger dimension creates negative amber angle as the suspention jounces Is very common on front suspensions for mediumtolarge cars for example: Peugeot 407

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Page 1: CCA1p1 1701 Molnar Short Long Arms

 

Short long arms suspension (SLA) 

 

  Is also known as an unequal  length double wishbone suspension. The upper arm  is typically 

an A‐arm, and is shorter than the lower link, which  is an A‐arm or an L‐arm, or sometimes a pair of 

tension/compression arms. 

  Double wishbones are usually considered to have superior dynamic characteristics as well as 

load‐handling capabilities, and are still found on higher performance vehicles. 

Advantages: 

‐ when the vehicle  is  in a turn, body roll results  in positive camber gain on the  lightly  loaded  inside 

wheel, while the heavily loaded outer wheel gains negative camber. 

‐provides the engineer more free parameters, suspension can be tuned easily and wheel motion can 

be optimized 

‐  They  also  provide  increasing  negative  camber  gain  all  the way  to  full  jounce  travel,  unlike  the 

MacPherson strut, which provides negative camber gain only at the beginning of  jounce travel and 

then reverses into positive camber gain at high jounce amounts. 

Disadvantages: 

‐braking and cornering forces are higher, needs better burshing into the chassis. 

‐poorer kingpin geometry 

‐bigger dimension 

‐creates negative amber angle as the suspention jounces 

 

 

Is very common on front suspensions for medium‐to‐large cars for example: 

  ‐Peugeot 407 

Page 2: CCA1p1 1701 Molnar Short Long Arms

 

 

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  ‐Mercedes Benz SL/SLS: 

 

 

 

 

 

 

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Bibliography: 

http://en.wikipedia.org/wiki/Double_wishbone_suspension 

http://en.wikipedia.org/wiki/Short_long_arms_suspension 

www.topspeed.com 

www.caranddriver.com 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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