voucht
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| posted on 2/1/24 at 05:47 PM |
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Front suspension brackets positionning on a Locost
Hello Everyone and happy new year!
For the Locost, on Ron Champion’s book, there are all dimensions for positioning the front suspension brackets vertically. But I can’t find anywhere
how to place them longitudinally (view from the side of the chassis), especially the top ones according to the lower ones, which will set-up
caster.
Am I missing something? Should I position them so the top drag link and the lower ball joint axis are aligned vertically? Is there just no caster on
this car?
Thank you.
https://vouchtroadster.blogspot.com/
https://cafrazx550.blogspot.com/
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Slimy38
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| posted on 2/1/24 at 08:45 PM |
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Caster is dealt with by the unequal arms on the top wishbone. You can add or subtract additional caster by moving the brackets but priority should be
good positioning for strength. The top rear and bottom front brackets appear to be central on the RHS, with the other pair controlled by wishbone
width.
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jps
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| posted on 3/1/24 at 07:57 PM |
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Are you building another one??!!
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voucht
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| posted on 5/1/24 at 09:35 AM |
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quote:
Originally posted by Slimy38
Caster is dealt with by the unequal arms on the top wishbone. You can add or subtract additional caster by moving the brackets but priority should be
good positioning for strength. The top rear and bottom front brackets appear to be central on the RHS, with the other pair controlled by wishbone
width.
Thank you for your answer.
By positioning the top rear and bottom front brackets as you say, which makes sense btw, thanks, I get a 5.6° caster angle. Seems about right, no?
https://vouchtroadster.blogspot.com/
https://cafrazx550.blogspot.com/
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voucht
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| posted on 5/1/24 at 09:42 AM |
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quote:
Originally posted by jps
Are you building another one??!!
Hi John,
After years and years trying to get my Swedish-road-legal Haynes Roadster, French-road-legal, without any success, I gave up and sold it last month.
The buyer will use it on track days, so at least it will have a second life. But it broke my heart, really.
So for now, I'm "building" a new one, yes, but just virtually on Solidworks  And for a change I try the Ron Champion Locost.
But who knows, it might become real one day!
https://vouchtroadster.blogspot.com/
https://cafrazx550.blogspot.com/
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Slimy38
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| posted on 5/1/24 at 03:40 PM |
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quote:
Originally posted by voucht
Thank you for your answer.
By positioning the top rear and bottom front brackets as you say, which makes sense btw, thanks, I get a 5.6° caster angle. Seems about right, no?
Yep that's pretty much spot on, page 118 of the book says 5.3° +/- 0.3°.
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voucht
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 posted on 5/1/24 at 10:04 PM |
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quote:
Originally posted by Slimy38
quote:
Originally posted by voucht
Thank you for your answer.
By positioning the top rear and bottom front brackets as you say, which makes sense btw, thanks, I get a 5.6° caster angle. Seems about right, no?
Yep that's pretty much spot on, page 118 of the book says 5.3° +/- 0.3°.
Perfect! Thank you very much for the help 
https://vouchtroadster.blogspot.com/
https://cafrazx550.blogspot.com/
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Myke 2463
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| posted on 9/1/24 at 04:45 PM |
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I built my locost which is a bit bigger than the std size with 6 deg caster after seeing many had centring problems, and have centring with no
problems. The SVA tester was very impressed as many just scrape through. Build another one, you know you want to.
Be Lucky Mike.
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