bigtime
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| posted on 16/6/13 at 02:18 PM |
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Effect of wheelbase change by frame rails and suspension brackets not parallel to car centerline?
In most locost plans the frame rails between the front tires and the engine are angled inward toward the front.
So wheelbase will change a bit as the suspension moves up and down.
Any beneficial or detrimental effect of this for racing?
Are there any other sport or racecars with angled frame rails and suspension mounting points?
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DavidM
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| posted on 16/6/13 at 02:28 PM |
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On a locost the front suspension mounts are parallel to the centreline of the chassis so there is no change of wheelbase with suspension travel.
David
Proportion is Everything
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tilly819
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| posted on 16/6/13 at 02:33 PM |
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The inboard pickups are parallel despite the chassis being tapering in.
A better example would be the Pagani zonda rear suspension
http://4.bp.blogspot.com/-MXCxNWL-bzI/Ta_ip6lyz0I/AAAAAAAADFQ/nY2zCHukRk8/s1600/0410_17z%252BPagani_Zonda_C12_S%252BUnderhood_Engine_Suspension.jpg
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Tilly
[Edited on 16/6/13 by tilly819]
F20C Haynes roadster 440 BHP/Tonne www.youtube.com/handmadeextreme
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mark chandler
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| posted on 16/6/13 at 07:26 PM |
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You must be looking at the wrong book
 
lower bone suspension mount Nov 2005
Regards Mark
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Carbonman
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| posted on 16/6/13 at 07:30 PM |
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Would it not be the angle of the pickup points in relation to the horizontal that would have an effect on wheelbase? ie if the front pickup was lower
than the rear one then the wheelbase would shorten during travel and vice versa? Or am I missing something?
[Edited on 16/6/13 by Carbonman]
Carbon Copies Ltd
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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Slimy38
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| posted on 16/6/13 at 08:26 PM |
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quote:
Originally posted by Carbonman
Would it not be the angle of the pickup points in relation to the horizontal that would have an effect on wheelbase? ie if the front pickup was lower
than the rear one then the wheelbase would shorten during travel and vice versa? Or am I missing something?
[Edited on 16/6/13 by Carbonman]
That is true, instead of a true up and down suspension travel you would have a slight front to back movement as well. A rear swing arm might have a
similar behaviour although incredibly tiny. However, the jig for mounting the brackets is the same on the front and back, so the book seems to do
it's best to maintain a true up/down movement.
[Edited on 16/6/13 by Slimy38]
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