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Described Arc Options
Aventador LP700-4
Posted: Saturday, September 30, 2017 8:13:58 AM
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Joined: 2/13/2017
Posts: 102
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What does " the arc that the wishbones describe " mean here?

If you look head-on at this type of system, what you'll find is that it's a very parallelogram system that allows the spindles to travel vertically up and down. When they do this, they also have a slight side-to-side motion caused by the arc that the wishbones describe around their pivot points.

Source:
http://www.carbibles.com/suspension_bible.html

I guess that it refers to an ASSUMED Arch the wishbones draw around their pivot points.

Is that Arc is an assumption?


thar
Posted: Saturday, September 30, 2017 8:26:27 AM

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You might have the right idea but 'assume' is the wrong word.

Quote:

Describe
formal
If you describe a shape, you draw it or move in a direction that follows the line of it:

He used compasses to describe a circle.



It moves along an arc.

An arc is a geometric shape, a path. Note this is not an arch - which is a construction.


Obviously a common root with 'arch' but don't confuse the words - they are different.

Quote:
arc noun [ C ] (CURVE)


the shape of part of a circle, or other curved line:
The ball rose in a high arc and fell behind the boundary line.
Aventador LP700-4
Posted: Saturday, September 30, 2017 8:38:58 AM
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What I understand from your explanations is that Wishbones have an Arc-Like movement around their pivot points. Am I right?
thar
Posted: Saturday, September 30, 2017 9:22:00 AM

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Yes. Compared to a vertical up-and-down suspension.
Romany
Posted: Saturday, September 30, 2017 9:43:39 AM
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Curious - I gather we are not talking about chicken's breastbones here? What "system" does it describe?

And also: "very parallelogram" ("Its a very parallelogram system...")?
thar
Posted: Saturday, September 30, 2017 9:52:33 AM

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Joined: 7/8/2010
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Hey, you try to make an adjective out of parallelogram!
-gramic?
Silenced

Car suspension. A way of connecting chassis to wheels with a spring for suspension. Whistle





No chickens were harmed in the making of this car!
Romany
Posted: Saturday, September 30, 2017 10:10:50 AM
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Joined: 6/14/2009
Posts: 12,847
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Location: Brighton, England, United Kingdom

Ah-hah! Thanks Thar - one glance at the graphic negates the need for a thousand questions!!
leonAzul
Posted: Saturday, September 30, 2017 10:21:55 AM

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Location: Miami, Florida, United States
Romany wrote:

Curious - I gather we are not talking about chicken's breastbones here? What "system" does it describe?

And also: "very parallelogram" ("Its a very parallelogram system...")?


Clearly you are not a gear-head, nor afflicted with the sort of G.A.S. (Gear Acquisition Syndrome) that some persons would like to enjoy.

The topic is motor cars, more specifically, the blatant promotion of automobiles.

Have at it !

Whistle


"Make it go away, Mrs Whatsit," he whispered. "Make it go away. It's evil."
Romany
Posted: Saturday, September 30, 2017 10:36:05 AM
Rank: Advanced Member

Joined: 6/14/2009
Posts: 12,847
Neurons: 39,161
Location: Brighton, England, United Kingdom
Believe it or not, I did study engines -including car engines - for a while: to get me over my pathological fear of flying! (It didn't work).

But that was only the front bit.Except for the radiator which I once tried to break an egg into when it developed a leak.(It didn't work). And the fan belt which I was to replace with pantyhose in an emergency. (Didn't work: because it was Queensland and who the hell wears pantyhose!).

Having opened a few bonnets recently (older son is car-shopping) I know enough about the workings of the cars we drive now to know that the days of breaking eggs, and utilising pantyhose are, in any case, long gone.
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