Ah, The Trunnion Thread Again!
Bob, a trunnion (as used in a Spit) is a type of joint in the suspension
that allows movement in two directions. In the front, it's that brass
thing with the grease fitting, on the vertical link of the front wheels..
It allows the wheels to turn, and the vertical link/lower control arm to
pivot. Think of Patrick's cannon definition, it must aim left-to-right and
up-and-down.
In a more modern car, a lower ball joint serves the same function.
Trunnions were cheaper to produce than ball joints, so the Spit only got
one on each side.
===============
A TEST FOR BOB: (British listers need not answer)
What am I talking about in the advice below?
+++++++++++++++
Don't scratch the hoodsticks by laying them on the boot or scuttle after
removal!
And don't rip the gaiters whilst installing them.
+++++++++++++++
Atwell Haines
'79 Spitfire
At 12:29 PM 8/25/98, Bowen, Patrick A wrote:
>OK all A trunnion as described by Websters II New Riverside University
>Dictionary.
>
>trun.nion n. [fr. trognon, stump.] A pin or gudgeon, esp. either of two
>small cylindrical projections on a cannon forming an axis on which it pivots.
>
>simply said I think it means "pivot point" A trunnion allows a suspinsion
>to rotate in only one direction while a ball joint lets in move in 360
>degrees. Why do they use trunnions got me
>
>Patrick Bowen
>'79 Spitfire
>
>At 11:50 AM 8/25/98 -0500, Victor B. Michael wrote:
>>Bob,
>>
>>This should be credited to Malcom Walker's FAQ page
>>(http://www3.bc.sympatico.ca/walker/triumph/trfaq.htm). I simply have a
>>link to there. There is a link to a British-American/American-British
>>dictionary.
>>
>>In the front of the Haynes Manual there is a "Use of English" page.
>>
>>"trunnion" is not listed in either. Sorry. I'm not sure this requires a
>>translation though??? <laugh> I don't what the "trunnion" is, but it's
>>possible it's the same in either flavour/flavor of English.
>>
>>(I looked up trunnion in my Vic Brit catalog: Page 124 - it's the pivot
>>hardware on the A-arm at the base of the front shock. *shrug* ;)
>>
>>Either way, the two sources should be of help to you.
>>
>>Vic M.
>>
>>robert.perciaccante@pharma.novartis.com wrote:
>>>
>>> I have a question.
>>>
>>> Having worked on American cars all my life, and admittedly only really
>>> discussed cars with other Americans (before our British friends get upset,
>>> please read on), I am unfamiliar with a few terms used by people from the
>>> other side of the pond. It took me a while to figure out what a "bonnet"
>>> was, but what is a trunion? It that the same sort of deal, where
Americans
>>> call it one thing and British call it another?
>>>
>>> I have to admit I feel pretty stupid asking this, because having totally
>>> stripped my Spit down, I have seen more of a Spit then a lot of long time
>>> Spit owners who have opted to not remove the shell from the frame, but I
>>> still don;t know the proper terminology... Can anyone help? I think
Vic's
>>> page has the Glossary on it, but I don't remember there being a "trunion"
>>> listed...
>>>
>>> Thanks!
>>>
>>> Bob
>>
>>--
>>-----------------------------------------------------------------
>>Victor Michael | vmichael@tibco.com
>>Systems Engineer | Voice (312) 214-2327
>>TIBCO Finance Technology Inc. | Pager (800) 759-8888
>>CTS, Chicago | Pin# 1583904
>>-----------------------------------------------------------------
>>
>
>
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