Is it Chapman or Double Wishbone?

Kevin

Kevin

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@ABFoz I'm not sure if the newer rear suspension can be described as "Chapman" because it has double wishbone supporting the wheel so the driveshaft itself does not "form the lower link of the suspension" as described here for Chapman: Chapman strut - Wikipedia
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Subaru refer to it as "Double Wishbone"
 
I agree, I only used the term Chapman for the coilover-like strut style. Double wishbone is still the better term for Subaru's later models' suspension geometry because the Chapman struts are still used even for non-double wishbone suspension types. Cheers.

EDIT: Yes, I think it became a colloquial term to use the coilover-looking strut, the Chapman strut, and I think I am going to stop referring to it as such because upon checking again, Colin Chapman's Lotus 15 suspension design clearly has the axles as lower links. Apologies.

Here is the proper Chapman Strut system used by Lotus Engineering:
1587522013200.png
 
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You can be forgiven as even Brett Middleton got it wrong, both model series and suspension! Just as well he's retired and sold MRT!
 
Chapman strut is much closer to the MacPherson strut than double wishbone surely.
 
Kevin said:
You can be forgiven as even Brett Middleton got it wrong, both model series and suspension! Just as well he's retired and sold MRT!
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So that's why the videos stopped. Pretty early retirement, innit?
Ben Up North said:
Chapman strut is much closer to the MacPherson strut than double wishbone surely.
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It is and calling just the coilover-looking strut, Chapman Strut, is a SIN for me after reading the engineering journal about Lotus Engineering. They know what they are doing and I can now understand why they excelled in their thang.
grump said:
I though the radius arm might be the lower link? Can't tell if the axles are splined or not.
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According to the journal I have been reading about Lotus Engineering, their lightweighting consists of parts that do more than one job to keep much less parts, therefore, less weight, so in the rear suspension, for example, they use the driveline/shaft as part of the suspension to lower unsprung weight, as well. So the driveline drives and contributes to the suspension geometry, too. I think it's pretty smart, engineering wise.

Here is the driveshaft-link design of the Lotus 15:
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The original Lotus 7s have the same type of driveline/shaft, as well, but double wishbone. Cheers.
 
Yes, it's hard to retire, I know many people who want to work, not full time though, until they die. In Japan, they say one starts dying when he stops working. Haha.
 
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Yes, in Tokyo I saw many old fogies who could hardly walk being dropped off by their limos for work.
 
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