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Car Forum / Mercedes-Benz Cars / April 2005

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Antique Benz trivia help

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Conrad - 17 Apr 2005 20:17 GMT
Greets,

I have a small bet with a friend I need help resolving. I swear
I read somewhere about an antique (1920-ish?) Benz restoration
that involved a laminated, or stacked engine block. Apparently
the engine block was made in layers - I guess of plate steel,
although it may have been thicker castings. Cylinder liners, were
of course, used.

I have no idea how the layers were bonded, which is why my friend
says I'm a few french-fries short of a happy meal, and that any
block made that way would spew oil and coolant from each layer.

I contend if it's possible to make a shotgun barrel out of wire,
that a stacked block is not only out of the question, but was
actually made by MB.

Any historians out there?

Conrad
Engineer - 18 Apr 2005 01:25 GMT
> Greets,

(snip)

> I contend if it's possible to make a shotgun barrel out of wire,
> that a stacked block is not only out of the question, but was
> actually made by MB.

I think you are referring to what is called a Damascas barrel.  They
were made by winding twisted iron strips around a mandrel and
hammering in a forge to weld them together (mostly - there were oxide
voids.)  These barrels look wonderful with surface patterns often of
great beauty, but they were not very strong compared to fluid steel
construction.  Received wisdom, and common  sense, limits them to
black powder shells, not modern smokeless loads.

> Any historians out there?

Not me for cars!

> Conrad

Cheers,
Roger
1998 E320 driver, skeet shooter and shotgun collector.
Conrad - 18 Apr 2005 02:30 GMT
>> Greets,
>
[quoted text clipped - 11 lines]
> construction.  Received wisdom, and common  sense, limits them to
> black powder shells, not modern smokeless loads.

Yep - and not very strong meant a faceful of metal fragments if
they were overloaded. I've actually handled one that had a bulged
barrel from overloading, which I gather was unusual - I was told
that they either held together OK if you used sensible amounts of
powder, or blew apart if you didn't - whoever shot that last load
in the bulged one was lucky. But they were beautiful, and much
lighter than the other pieces of the era. Just incredibly labor-
intensive - and a little delicate.

Conrad
 
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