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Dommie cylinders are sleeved - fact or fiction #720094
12/27/17 2:05 am
12/27/17 2:05 am
Joined: Aug 2001
Posts: 1,966
Oztralia
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Rohan Online content OP
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Rohan  Online Content OP
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Iron dommie cylinder, an early one - can't see any sleeves here.
Just one iron casting, lotsa machining...


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Re: Dommie cylinders are sleeved - fact or fiction [Re: Rohan] #720100
12/27/17 3:48 am
12/27/17 3:48 am
Joined: Nov 2012
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Isle of Wight, UK
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koan58 Offline
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So? Rohan? Cylinder blocks for all the major manufacturers were similar, except for alloy specials, and a few who cast them separately.
Certainly wouldn't be any sleeves originally, just one piece of cast iron throughout.
And what a casting! Compare with the simple symmetry of a Triumph.
A good engineer does for a bob what a designer does for a quid.

Re: Dommie cylinders are sleeved - fact or fiction [Re: koan58] #720343
12/29/17 7:50 am
12/29/17 7:50 am
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Rohan Online content OP
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Originally Posted by koan58
So?
Cylinder blocks for all the major manufacturers were similar.


Indeed.

Its just that on a forum not a million miles from this one, some 'expert' is venturing that dommie cylinders were sleeved.
With 5mm thick sleeves too, if you please.....
If that were true, refurbishing a worn out set of cylinders would be simple simple simple,
instead of the dire shortage of good cylinders we have today,...
(Myth busted ? = fiction)

Originally Posted by koan58
A good engineer does for a bob what a designer does for a quid..


Nortons had to be careful too they didn't infringe Triumph patents.
Nortons inhouse engine man had done quite a straightforward design of twin,
but it looked a lot like a Triumph design. Quite a lot !!
So they bought in Bert Hopwood to do something that was different enough to keep them legal.


Moderated by  Dave Comeau 


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