<VV> HRPT

[Ron]

"How and when does one "maintain" that particular connector?  Replace it 
periodically?"

A good idea!  Simply require replacement every forty years and the whole 
problem goes away!

Now, Away!

RonH

----- Original Message ----- 
From: "Dave Keillor" <dkeillor at tconcepts.com>
To: <virtualvairs at corvair.org>
Sent: Friday, March 07, 2008 10:12 AM
Subject: <VV> HRPT


>I find it amusing, and somewhat annoying, that this has gone on way too
> long.  Having said that, I can't resist making some comments of my own.
> I'm an Electrical Engineer and this is a poor design from an engineering
> perspective (maybe not from a bean counter's cost perspective, but I'm
> not one of them).  Here's why it's a poor design:
>
> 1. In most every type of electrical equipment, connectors are
> responsible for the majority of equipment failures.
>
> 2. Failure of this particular connector can have extremely adverse, and
> possibly life-threatening consequences (should the failure occur at the
> wrong time and place).
>
> 3. Good connections are gas tight and this requires pressure.  This
> particular design does a poor job of obtaining and maintaining proper
> pressure for a gas tight connection.
>
> 4. When a connection begins to fail, it often exhibits an increasing
> internal resistance.  Internal resistance in a high current connection
> causes heat, and heat does what to plastic?
>
> 5. Mark says that proper maintenance is the key.  How and when does one
> "maintain" that particular connector?  Replace it periodically?  As an
> aside, I once had a cartridge fuse in my home's fuse box that had a
> defective solder joint where the fuse link is soldered to the end of the
> fuse.  After several years, it got very hot and burned both the fuse and
> fuse box.  Would better maintenance have prevented that problem?
>
> Believe me, it's defective design.
>
> Dave Keillor
>
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