[ARC5] Aircraft B-18A Bolo

[J. Forster]

Does anybody know how the degaussing coil current was set for subs? Did
they send somebody out in a rubber boat with a magnetometer to do a
far-field survey?

-John

==============

> 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
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>