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nuckolls.bob(at)cox.net
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 Posted: Thu Sep 18, 2008 5:50 am Post subject: E-Mag P-Mag Safety info |
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I've been out of town for a couple of days an
we don't have handy access to e-mail set up yet
in M.L.
Some thoughts on the current e-mag kerfuffle:
I spoke at length with Brad at Emagair yesterday.
He was quite willing to "bare his soul" as it were
and made me privy to some facts that will probably
never be put out for public consumption. But suffice
it to say the following:
The unique failure mode that began this thread is
an rare event in the constellation of delivered
product. It involves a combination of things, some
of which may never be fully quantified because
the combination is unique to the as-installed system.
Theses are exceedingly difficult to access for
measurement, analysis and deduction of root cause.
95% of all my experiences in such matters have shown
that the fastest route to customer satisfaction is
to add robustness by redesign. After all, how difficult
is it to get a grip on an aspirin sized magnet?
The problem is centered on a limited segment of
production as outlined in this document published
on Emag's website:
http://emagair.com/E-MAG%20Service%20Bulletin%203.pdf
The mechanical issues surrounding attachment of the
position sensor magnet have been addressed and the
new attach methodology has been implemented in production,
all units returned for any kind of service are being
upgraded. Details of the new magnet mount are
shown here:
http://emagair.com/sensor%20SB.htm
There are countless situations in the history of emerging
technologies that progress is measured in more-steps-forward-
than-steps-back. We rely on lessons learned, sifting
of the simple-ideas for optimum design, test to the best
of our ability and then go to market. Ultimate success
or failure is driven by the combination of technical
prowess, manufacturing skill and honorable behavior in the
marketplace.
It's a mystery as to why a small number of installations
have experienced a cluster of failures. After all, this
configuration has been in the marketplace for over 13
months but the cluster of failures surfaced in the past
few months. As I outlined above, it's probably not in the
stars that a detailed investigation will or even can
be conducted to ascertain the combination of stresses and
limits that produced the failures.
There are individuals who have complained that their offered
expertise and talents for deducing root cause and/or remedy
were rebuffed. Any of you that have been in business will
understand that it is not a good idea to engage individuals
for problem solving that have too many dogs in the hunt.
The fact that capable and perhaps very useful talents were
not utilized is not evidence of irresponsible or dishonorable
behavior on the part of Emag.
There are individuals who for whatever reasons will suggest
there is great cause for contemplation, discussion and perhaps
even a call to action for dealing with such matters. The discussions
have already filled many keyboard-hours of participants on
the 'net. A common thread that runs through much of the
discussions I've read is the lack of data from original
sources on what happened and what's being done to fix it.
If anyone has personal concerns, call Emag and talk to
Brad or Tom. I've visited their facility and have exchanged
email and telephone conversations with them. I have no
reason to believe they're not exercising due diligence in
application of appropriate skills, talent and technology
to address a "step backwards" in the evolution of their
product. I also find no evidence of dishonorable behavior
on their part.
Finally, I'll remind readers of this List of a suggestion
I made some years ago as the Emag products first emerged.
When you buy an engine with mags, you're not likely to
get much if any rebate for leaving the mags off. Given
that 90+ percent of performance gains for EI come with
the installation of but one system, how about running one
of your mags in parallel with one Emag? When the first
mag craps, put the second mag on. Don't install dual Emags
until you've "used up" both mags.
This philosophy will allow you to exploit performance
gains offered while insulting yourself from the inevitable
effects of steps-back during the development of any
product. This mixed-technology approach to exemplary
system reliability is a tried and proven technique.
I'm not suggesting that discussions on this topic should not
continue. I do suggest that for individuals who are
gravely concerned about their own projects AVOID making a
decision based on 'net-babble. Yes, until you access
original-source-data or you are reading the analysis from
a learned writer that has access to original-source-data,
it's ALL 'net-babble.
Keep in mind too that folks who have experienced failures are
not sources of original data that goes beyond the facts of their
experience. Someone who suffers a stroke may have a great deal to
say about their experience without knowing a thing about the
simple-ideas that caused it. Their telling of the story has the
effect of raising fear of stroke on the part of listeners . . .
but adds nothing to an understanding of how risk for a similar
experience can be reduced.
Call Emag and if push comes to shove, run a Magneto/Emag combination
for awhile. Bottom line is that the sky is not falling.
Bob . . .
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Speedy11(at)aol.com
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| Posted: Fri Sep 19, 2008 10:23 am Post subject: E-Mag P-Mag Safety info |
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Bob,
Thanks for acting as our expert go-between with EMagAir. I've been tempted to call them, but I'm sure they would prefer to avoid another phone call or email of possible. Your contact with them answered questions for all of us while simultaneously reducing the duplicative responses for Brad.
Stan Sutterfield
| Quote: | Call Emag and if push comes to shove, run a Magneto/Emag combination
for awhile. Bottom line is that the sky is not falling.
|
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