[ARC5] Aircraft B-18A Bolo

[Mike Feher]

In this case, I can understand how they could be used for ASW if MAD was a
Magnetic Anomaly Detector. Obviously, as pointed out to me in other posts,
when a sub is on the surface regular Radar will work as with a periscope,
but a return from a periscope would be pretty small back then. However, when
I think of ASW I was thinking when submerged. I worked/designed ASW systems
for about 20 years. 73 - Mike

Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960 


-----Original Message-----
From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On
Behalf Of Jack Antonio
Sent: Wednesday, January 04, 2012 12:44 PM
To: arc5 at mailman.qth.net
Subject: Re: [ARC5] Aircraft B-18A Bolo

On 1/3/2012 2:46 PM, Mike Morrow wrote:

> The B-18A dates from 1937 and 1938.  I assume it used a 12 vdc 
> electrical system.

I'm wondering, since the B-18s were outfitted with Radar for ASW, if the
electrical systems were upgraded to handle the extra loads?  The radar
probably operated on 80 or 115VAC at 400 or 800 cycles, but would the DC
system have to have been upgraded to 28V as well?

The reference I have says that 122 (out of a total of about 300) B-18s were
equipped with "ASV radar and MK IV MAD" but I'd guess ASV refers to the
acronym rather than an equipment type.

Jack Antonio WA7DIA/4
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