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"Rumburg, William" wrote:
There are others trying as hard as they can to find fault with my
backup battery switching and charging system.
Well Bill, whether it was intended to be a public post or not, it is now and
hence deserves a public response.
Regardless of what any one of us may have to say about anyone else's design, we
must keep one very important thing in mind: Our airplanes are classified as
"Experimental". What that means is that we are free to experiment --
basically do whatever we want. If one want to have a grapefruit or a potato as
our backup electrical source, the FAA or anyone else can not prevent you from
doing it. If it works, great; if it fails and ends up hurting and killing us
and anyone willing to take the risk of flying with us, as far as the FAA is
concerned that is fine too. All that the law requires is that we advise our
passengers of the experimental nature of the aircraft and let them decide.
Based on their knowledge of the pilot, if they think that the person can be
trusted, they will go flying, otherwise people will make excuses like "I would
love to fly with you, but I am really looking forward to spending the weekend
with my in-laws"
What others are pointing out, and I am one of several who have raised questions,
is that maybe the approach you have taken may not be as sound as you are
projecting it to be. You can choose to look into the specific areas pointed out
to you or you can ignore it all -- it is up to you (see the previous paragraph).
Have you seen the recent posts
from Hamid Wasti? Judging from his email address, he apparantly works for
Brent Regan.
I work with Brent Regan and do electrical design. Most of my designs can be
found in two areas -- medical and aviation. Sierra Flight System's EFIS2000,
Northstar's CT-1000 and its UPS are among my designs that many people here may
be familiar with. One other design (with internal battery ) is being
demonstrated at the Farnborough air show (the big iron equivalent of Oshkosh)
this week. Next year there will most probably be 2+ Other designs include
electronics for a number of robots used for human surgery. I will also be
giving a talk this Friday at Oshkosh on rechargeable batteries.
I'll have to contact VMS and Concorde for information in order
to rebutt some of his questions,
If I recall correctly, the question was raised about the charging voltage on the
Sears DieHard motorcycle battery. Where does Concorde come in? Next, let me
try and understand what you are saying. People pointed some potential problems
in your system. Even without any data (you have to ask VMS & Concord) you have
already decided that you do not have a problem and you need that data to rebut
the questions? With no offense to the legal profession, are you trying to be an
engineer looking for facts to see if there is indeed a problem that needs to be
addressed or are you trying to be a lawyer who is obliged to vigorously defend
his case regardless of facts?
but I would expect a $40. multimeter to
have more accuracy than he attributes to the $ 4,000. VMS.
Now I am really not sure what you are saying here. I had suggested that you
look at the specs for a VMS and see how accurate it is. When you start
looking at things to an accuracy of 0.1V (actually, in your analysis you were
out of spec by 0.1V) you need to make sure that you are measuring using
something that has adequate accuracy. Would you measure the thickness of a
0.005" piece of paper with a wooden foot ruler?
Hamid
LML website: http://www.olsusa.com/Users/Mkaye/maillist.html
LML Builders' Bookstore: http://www.buildersbooks.com/lancair
Please send your photos and drawings to marvkaye@olsusa.com.
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