Post #283,646
5/2/07 10:52:16 AM
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So, what's a thrust arm in normal terms?
I haven't had much luck looking it up online.
Regards,
-scott anderson
"Welcome to Rivendell, Mr. Anderson..."
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Post #283,647
5/2/07 10:58:19 AM
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It holds the bitumogeneous spandrels. HTH!
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Post #283,650
5/2/07 11:23:40 AM
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Isnt' that what holds the havershaft to the giggleclamp?
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Post #283,663
5/2/07 11:51:37 AM
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No, that is the kininomer bearing pin, giggleclamps require
4 or 6 of them. It depends on the havershaft twist, being righthand adjustable or lefthand fixed.
-- [link|mailto:greg@gregfolkert.net|greg], [link|http://www.iwethey.org/ed_curry|REMEMBER ED CURRY!] @ iwetheyFreedom is not FREE. Yeah, but 10s of Trillions of US Dollars? SELECT * FROM scog WHERE ethics > 0;
0 rows returned.
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Post #285,446
5/26/07 10:49:59 PM
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Now just quit that out, the lot of you!
It' too late at night for all this technical confabulation, dammit!
jb4
"It's hard for me, you know, living in this beautiful White House, to give you a firsthand assessment."
— George W. Bush, when asked if he believed Iraq was in a state of civil war (Newsweek, 26 Feb 07)
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Post #283,659
5/2/07 11:47:01 AM
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I'd have to say it
Same thing as a panhard bar.
Except since you independent suspension, it isn't quite a panhard bar. Panhard bars are made to keep a full axle in place with limited side to side movement.
Now for something like independent suspension, you need something like a "Watts" link. Except live part of the Watts system are on the outer parts vs the the center.
Though, there are other pieces it could be. One possibility being the "single end" of the wishbone. When I was doing sprint car racing a few (dam 10) years back the single eyelet end of the wishbone was called the "thrust end", because it was the piece that actually thrusted the front solid axle forward, that was the only connection to the solid axle to move it forward, hence the "thrust" link.
So, given that it would have caused the front end to scrape on the pavement, I am thinking the second explanation.
-- [link|mailto:greg@gregfolkert.net|greg], [link|http://www.iwethey.org/ed_curry|REMEMBER ED CURRY!] @ iwetheyFreedom is not FREE. Yeah, but 10s of Trillions of US Dollars? SELECT * FROM scog WHERE ethics > 0;
0 rows returned.
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Post #283,666
5/2/07 12:00:42 PM
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Something like this?
[link|http://www.tooladdiction.com/tool_for_bmw.htm|http://www.tooladdic.../tool_for_bmw.htm]
Regards,
-scott anderson
"Welcome to Rivendell, Mr. Anderson..."
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Post #283,667
5/2/07 12:04:06 PM
5/2/07 12:05:30 PM
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Reverse Watts Link it is, then. Hmmm.
Also functioning as a lower control arm. To which the wishbone looks like it is connected to.
-- [link|mailto:greg@gregfolkert.net|greg], [link|http://www.iwethey.org/ed_curry|REMEMBER ED CURRY!] @ iwetheyFreedom is not FREE. Yeah, but 10s of Trillions of US Dollars? SELECT * FROM scog WHERE ethics > 0;
0 rows returned.
Edited by folkert
May 2, 2007, 12:05:30 PM EDT
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Post #283,670
5/2/07 12:16:26 PM
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My current understanding is this:
The thrust arm governs the position of the vertical wheel plane (perpendicular to the axle). So had this gone, the wheel would have been wobbling back and forth like a drunken sailor.
Not pavement diving, but still very hard to control.
Regards,
-scott anderson
"Welcome to Rivendell, Mr. Anderson..."
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Post #283,672
5/2/07 12:19:35 PM
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That is what a reverse watts link does...
It operates as a "lower control arm" when used in independent suspension.
But then, I am speaking from /dev/ass as I have never really^W looked at the A8 suspension.
-- [link|mailto:greg@gregfolkert.net|greg], [link|http://www.iwethey.org/ed_curry|REMEMBER ED CURRY!] @ iwetheyFreedom is not FREE. Yeah, but 10s of Trillions of US Dollars? SELECT * FROM scog WHERE ethics > 0;
0 rows returned.
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Post #283,687
5/2/07 4:02:14 PM
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The "position of the vertical wheel plane"? Yeah, in the...
...fore-and-aft direction, to be precise -- the vertical is also "perpendicular to the axle", but that is handled by the springy bits of the suspension. :-)
Like Greg says in the great-grandparent post to yours, "thrust" implies that it's pretty much parallell to the long axis of the car, to transmit the fore-and-aft forces from the drivetrain and brakes. (And I *think* that's what it looks like in those BMW pics you found.)
That's a "multi-link" suspension, the even-newer development from the "double wishbone" suspension, where one or both (usually just the lower, I think) of the A-arms has been replaced by two or more separate simple rod-shape arms; kind of like picking the "A"- or "wishbone"-shaped arm apart into two: A -> /\\ .
So it seems your A8 has multi-link, not actual double A-arms.
[link|mailto:MyUserId@MyISP.CountryCode|Christian R. Conrad]
(I live in Finland, and my e-mail in-box is at the Saunalahti company.)
Ah, the Germans: Masters of Convoluted Simplification. — [link|http://www.thetruthaboutcars.com/?p=1603|Jehovah]
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Post #283,691
5/2/07 5:36:20 PM
5/2/07 5:39:37 PM
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Yup . . .
. . they use a "multi-link" design because regular A-arms take too much dedicated space. With multi-link they can squeeze more stuff into a smaller space, and the tortured shapes of all those components demonstrate they're squeezing every cubic inch they can get.
Oh, pardon me . . . they would be squeezing "cubic centimeters" over there, wouldn't they?
[link|http://www.aaxnet.com|AAx]
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Post #283,700
5/2/07 6:00:19 PM
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Jawohl.
And every one they save, they squeeze into the engine instead, you know.
[link|mailto:MyUserId@MyISP.CountryCode|Christian R. Conrad]
(I live in Finland, and my e-mail in-box is at the Saunalahti company.)
Ah, the Germans: Masters of Convoluted Simplification. — [link|http://www.thetruthaboutcars.com/?p=1603|Jehovah]
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