[Milsurplus] Milsurplus Digest, Vol 257, Issue 22 B17

Tue Sep 9 11:04:37 EDT 2025

I worked with the Yankee Air Museum, now called the Michigan Flight Museum
at Willow Run. Their
C-47 in CBI colors has an ARC-8 that I restored. So it would be about 1943.
The ARC-8 is the BC-348/T-47 combination

Ken
W2EWL

On Mon, Sep 8, 2025 at 3:09 PM Mike Christie via Milsurplus <
milsurplus at mailman.qth.net> wrote:

> So which aircraft had the ART 13 & BC 348 was it the B29 I was told that
> these were not used in the European theater but were in Pacific theater.
> Mike
> W1ZFB
>
> On Monday, September 8, 2025 at 12:47:22 PM EDT, <
> milsurplus-request at mailman.qth.net> wrote:
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> Today's Topics:
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>   1. 1943 out of the box thinking? (Charlie L.)
>
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Mon, 8 Sep 2025 12:46:32 -0400
> From: "Charlie L." <mjcal79 at gmail.com>
> To: milsurplus at mailman.qth.net
> Subject: [Milsurplus] 1943 out of the box thinking?
> Message-ID:
>     <CA+d3itZe0U59bNJdC25pLDmzg3AG6FUXP4vjwK5jj0Qbqd6W2w at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> If you are familiar with the red dot style rifle sight, I think George N.
> Martin was thinking along that line in April, 1943.  The attached pic shows
> him buying the book, 'Aircraft Radio and Electrical Equipment', by
> H.K.Morgan on April 30, 1943, from the Georgia Division of the Bell
> Aircraft Corp.  Perhaps he was an employee, note the sales ticket where it
> says, "I hereby authorize Bell Corp. to deduct above amount from my pay in
> _____weekly installments."
>
> He was doodling on a piece of paper which he stuck in the pages in the
> chapter on 'Oscillographs'.  It is hard to read his writing, it is very
> tiny and light, but it appears he was drawing a circuit that was taking
> inputs from the airspeed 'computer' (his words) a logarithmic taper pot
> attached to a gun mount, a  a magnetic input from a compass all to deflect
> the spot on a CRT.  His notes refer to aim, angle, leading, and show a
> small plane with single and dual tail guns.  Perhaps he was sketching a
> simple drawing of the existing system in a plane, or he was trying to
> create a better way to shoot down the enemy.
>
> I am always on the look out for books on how things were wired in WW II
> aircraft, especially the B17 that I am involved with the rebuild of.  I
> have two of these books, one I got from Brian, KN4R, the other I bought
> from ABE Books several months earlier, but I do not know which one the
> paperwork was in.  The book also contains info and schematics on several
> pieces of gear, a lot of RCA stuff , a Collins 17D transmitter,  various
> Lear transmitters including the UT-6 that I spent a couple years trying to
> find info on, and a bunch of Western Electric aviation gear.  Fold out
> schematics on very thin paper, inter aircraft wiring diagrams and a ton of
> info on how things interconnected and functioned are included in the almost
> 400 page book with very small print.  I did  a comparison on books several
> years ago, basic novels that seem to always be in hardback and thick.
> Turns out, books used to have small print and 700-900 words on a page, but
> now, they use thicker paper, larger print, with about 300 words on a page.
> Again, with books and more words per page using less paper,  those of us
> who bought Coke and milk in a glass bottle to be turned in, cleaned and
> refilled, fixed out toaster and vacuum instead of throwing them away, were
> still more environmentally aligned than the latest GenZ person.
>
> I have a 1930's 3" Triumph 'Oscillograph' that still works quite well, but
> I had to put in one of those little power supplies I found on Amazon that
> makes 2000 volts out of 6 which I got by rectifying and filtering the
> filament volts, needed  to use for the trace as the HV tapped secondary
> quite making CRT HV.  Makes a nice 160 and 75 meter AM mod indicator.
>
> If you see books on epay or used book sites about vintage aircraft,
> especially any on electrical or radio, power plants are also  interesting,
> they are great reads on how things were done in the day, like how many
> planes they wrecked trying to figure out a supercharger for all altitudes
> .  While today we have a computer that feeds drivers and takes in signals
> from sensors,  those are childs play when you see how it was all done in
> the days of analog, both mechanical and electrical.  Check out the aiming
> computer for the 16" rifles on any WW II battleship.
>
> Charlie in NC
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