Today's Message Index:
----------------------
1. 10:00 AM - Re: Schematic drawing software (Bob White)
2. 12:41 PM - Re: Re: A123 Systems Nano-phosphate technology (Bill Dube)
3. 08:56 PM - 1 Amp Fuses (Michael Petersen)
Message 1
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| Subject: | Re: Schematic drawing software |
On Mon, 10 Sep 2007 09:28:11 -0600
"Robert L. Nuckolls, III" <nuckolls.bob@cox.net> wrote:
>
> At 09:31 AM 9/10/2007 -0400, you wrote:
>
> ><echristley@nc.rr.com>
> >
> >Robert L. Nuckolls, III wrote:
> >>
> >> TurboCAD 7 or higher will open, edit, print and save the drawing
> >> files posted on my website at:
> >>
> >>http://www.aeroelectric.com/PPS/
> >>
> >> You can get TurboCAD off ebay for under $20. Your wiring diagrams
> >> are 90% done on the website. Just grab the pages closest to what
> >> you want and suck them into your own wirebook.
> >>
> >> Bob . . .
> >
> >Bob,
> >
> >I'm really appreciative of all the work you've done with the Z drawings,
> >and educating us all. It is all worth the cost even at twice the price,
> >but I'd like to make a suggestion for an improvement.
> >
> >You publish the documents electronically in DWG format. DWG is a format
> >that is proprietary to AutoCAD. The complete specification is not public,
> >and AutoCAD has unilaterally made some changes to the format in the
> >past. There are several implications to this fact.
>
>
> <snip>
>
> I have $thousands$ tied up in AutoCAD software and thousands of
> hours of $time$ invested in being proficient with it. All of my
> customers can open, edit, print, and save my drawings under either
> AutoCAD or the format of their choice. Public access issues
> aside, AutoCAD is the logical choice for me to produce drawings
> and illustrations to support my career.
>
> I didn't plan to publish editable drawings because of the
> difficulty some folks might have acquiring suitable software
> to manage the drawings. At the time I first published the .dwg
> formats, AutoCADLT was available through university bookstores
> for about $125. Taking an engineering student to lunch would
> offer a means by which folks could get into a "real" autocad
> environment. In the mean time, folks told me about more than
> one application that would open, edit, print and save the
> .dwg format . . . not the least of which is TurboCAD v10 which
> I bought off Ebay for $10.
>
> While .dwg is AutoCAD's offspring, a number of companies
> have seen fit to offer applications that import the format
> at exceedingly reasonable prices. The DXF format is problematic
> and I've had more problems with transporting data between applications
> with dxf than I've had with a third-party application where
> the software guys took the .dwg format head-on.
>
> The short answer is that stuff on the aeroelectric.com website is
> a hobby that makes a little money and I cannot justify a great
> shuffling of the applications I use for my business just to
> expand the hobby. That doesn't preclude efforts to maximize
> access to the .dwg work product . . . and for the moment, my
> best suggestion is TurboCAD v7.0 or higher.
>
> Thank you for your time and consideration of this matter!
> Your assertions are quite accurate but I'll suggest that for
> me, the TurboCAD work-around is a useful solution.
>
> Bob . . .
>
I use VariCAD on Linux and it opens the AeroElectric .dwg files just
fine. VariCAD also comes in a Windows version. It used to be
reasonably priced at around $300, but is now $690 or $830 with one year
of support. Not so reasonable any more, and I'll probably never upgrade
again. Although compared to the $4000 for Autocad, maybe not so bad.
For cross application use, save the file in an earlier format rather
than the latest one. It usually takes a while for the third party
applications to catch up.
Bob W.
--
N93BD - Rotary Powered BD-4 - http://www.bob-white.com
3.8 Hours Total Time and holding
Cables for your rotary installation - http://www.roblinphoto.com/shop/
Message 2
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| Subject: | Re: A123 Systems Nano-phosphate technology |
>
> To be sure, these cells are one of the bright stars on
> the horizon . . . but they come with a legacy of unhappy
> stories, myths and concerns.
These nano-phosphate A123 Systems cells use an Iron-phosphate paste
instead of the traditional cobalt-based paste. They are an entirely
different creature becasue of this. Too bad that they are lumped in with
the "flame-thrower" style cobalt cells.
Bill Dube'
Message 3
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G'day Bob and List Members,
I have come across a number of equipment manufacturers that specify a 1
amp fuse for their equipment (eg Ray Allen trim systems) and I am using
a mini blade type fuse block in my aircraft. The smallest fuse I can
find is 2 amps, which leads me towards the following alternatives;
1. Stick to the philosophy of selecting the fuse to suit the wire
(22awg in this case) and ignoring the manufacturer's requirement.
2. Use the 2 amp blade fuse, being the closest available.
3. Incorporating some other type of 1 amp circuit protection, for
example a small circuit board being supplied via the main bus/fuse block
that provides several 1 amp circuits protected by a PTC type fuse.
My question is, is there a recognized 'correct' way of dealing with this
issue, or what is the preferred solution?
Bob, I have read your critique of Greg Richter's "Aircraft Wiring for
Smart People", in which you very briefly mention that PTC fuses are not
suitable for use in aircraft. Could you please elaborate on your
research and findings? By the way, I am half way through reading your
book and would like to thank you for the effort you put into helping
people like me understand these issues! Keep up the good work!
Thanks,
Michael
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