[Milsurplus] 14 volt C 47s? 14 volt RCAF fighters?

[Taigh Ramey]

It seems like most pre war aircraft were 12-14 volt and there was a standard
change sometime going into the war. Some trainers were manufactured with
12-14 volt systems like the SNJ-4 at NASM. The SNJ-4 is still a 12-14 volt
aircraft and has a date of manufacture of 6-43 and a Pensacola overhaul date
of 6-53. I would have thought that it may have received an upgrade to 24-28
volt system during the post war Navy overhaul but it did not. She still has
an SCR-183 installed and there are placards warning of the 12 volt system at
the GPU plug and on the BC-347.

Sure would like to see the documentation/correspondence about the change to
24 volt. I'd bet it is in the Sarah Clark collection at National Archives.

Taigh

Taigh Ramey
Proprietor, Vintage Aircraft
7432 C.E.Dixon Street
Stockton, California 95206
(209) 982-0273
(209) 982-4832 Fax
www.twinbeech.com
KEEP 'EM FLYING...FOR HISTORY!

-----Original Message-----
From: milsurplus-bounces at mailman.qth.net
[mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Bruce MacMillan
Sent: Wednesday, October 24, 2012 12:14 AM
To: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] 14 volt C 47s? 14 volt RCAF fighters?

Wasn't the original C47 a 12V (14V) system and the C47A upgraded to 24V
(28V)?

A common RCAF system was the AT1 & AR2/6 where the AR2 was 14V and the
AR6 28V.

The TR9 family of xmtr/rcvrs used in early Spits had to carry their own HT &
LT battery supply.

Bruce   m0soe

On 10/23/2012 6:29 PM, Boeing377 wrote:
> I was told that the 14 volt setup shown in the TO was for RCAF C 47s that
had 14 VDC electrical systems. Why did the make these non standard C 47s? I
would think it would add weight in larger conductors needed due to lower
voltage.
>
> What was the reasoning for making 14 volt transports and fighters in WW 2
when the rest of the allies had 28 volt DC systems?
>
> 73
> Mark
> AF6IM
> www.parachutemobile.org
>

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Version: 2012.0.2221 / Virus Database: 2441/5351 - Release Date: 10/24/12