On 5/24/2019 2:57 PM, Kas Kastner via Fot wrote:
> It was too big, too heavy, too complcicated, to expensive, other than
> those things it was just right. Apparently no one noticed those items
> when the specifications were being drawn up, nor noticed when the
> prototype was built up.
>
And, IIRC, the real kiss of death was that the aluminum castings were
one-offs, and the metal, during casting, apparently did not receive
proper degassing. The result was a limited set of porous castings that
wept oil and coolant when at working temperature, and the problem
couldn't be solved by substituting parts, because they all had the same
fault.
This is a problem with any small run of parts that don't receive
adequate attention from the foundry. I recall one model of Ferrari
twelve-cylinder heads that did the same thing. The cheap fix today is
to inject the casting with a loose epoxy slurry under pressure and
refinish all the surfaces. The expensive one is to reproduce the
castings using better methods.
Cheers.
--
Michael Porter
Roswell, NM
Never let anyone drive you crazy when you know it's within walking distance....
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