nuckolls.bob(at)cox.net
Guest
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 Posted: Thu Jan 03, 2008 10:05 am Post subject: EXP-Bus, et. als. |
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At 07:53 AM 1/3/2008 -0500, you wrote:
| Quote: |
<rdunhamtn(at)hotmail.com>
Carlos,
Pardon me for butting in here, but...
The ExpBus is a "canned" product designed by Greg Richter to be used
according to Mr Richter's design principles as outlined in Mr Richter's
book, "Wiring for Smart People". I heard Mr Richter speak at OSH in '05 and
read his "book". I liked it. Perhaps you should ask Mr Richter to expound on
the proper care and feeding of the ExpBus and how it interacts with your
engine's systems. That would make sense, wouldn't it? After all, it's his
system, isn't it? If you go to the Blue Mountain Avionics site there's a
discussion board there and I'm sure Greg will be happy to answer all your
questions. Alternatively, if your engine designer, (Mr Eggenfellner ?)
recommends this product, perhaps he could explain his choice and how to
integrate it into his design principles.
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Greg has his own version of the what-you-see-is-what-you-get electrical
system which he proposed in his publication "Aircraft Wiring for Smart
People" late in 2004. I attempted to engage Greg in a discussion of
the design goals and simple ideas that supported his recommendations
but he refused to participate in a friendly critical design review
of either his practical advice, science or philosophy of system
design. This exchange can be reviewed by interested readers at:
http://www.aeroelectric.com/articles/richter/richter.html
EXP-Bus pre-dates Gregg's efforts by several years. In
1999 I posted this series of exchanges on the EXP-Bus
at:
http://www.aeroelectric.com/articles/expbusad.html
http://www.aeroelectric.com/articles/expbusthd.html
The EXP-Bus was discussed comparatively with
Gregg's one-size-fits-all proposal in this
discussion about the philosophies and design
goals offered in the 'Connection:
http://www.aeroelectric.com/articles/What's_the_AeroElectric-List_About.pdf
There may be several additional offerings in the
wild in addition to the EXP-Bus and Gregg's proposed
product. There's a pre-fab assembly popular with
the large canard-pusher folks and offered out of
Florida as I recall. I don't remember the name
of that product. There may be others.
| Quote: | It seems to this humble poster that Bob has more than enough to do just
teaching us his time tested design philosophies and how to implement them in
our OBAM aircraft.
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There's nothing inherently "bad" about any of
these products as long as the laws of physics are
observed and as long as consumers of the products
are personally satisfied with the utility and
performance of their purchase.
My objection to such products is that for the same
investment of $time$ needed to purchase the product,
on can custom assemble a system tailored exactly
to the builder's needs and have money left over.
Further, one's "home grown" system is crafted from
parts wherein the builder knows exactly where to
get spares for future repairs and/or expansion.
WYSIWYG electrical system products lock you into the
choices and sources chosen for you by the designer
of that product.
It's important that folks understand personal
goals for my efforts are driven by a long cultivated
professional quest for the elegant solution. Solutions
that strive for minimum parts count, low cost of
ownership and failure tolerance. These goals are
often and easily satisfied without detailed regard
as to what parts are used or how much they cost.
As soon as one selects a WYSIWYG product, then
part of the $time$ expended goes toward the
substitution of a third party's ideas and $time$
for that of your own. If it works for you, fine
by me. But understand that my reluctance to spend
$time$ doing critical design review and/or system
integration studies for such products would amount
to a tacit recommendation of these products . . . a
position I've avoided for reasons cited.
Bob . . .
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