[ARC5] Degaussing Field and B-18's

[Rick]

This discussion has caused me to become very interested in the subject of degaussing in general.
Can anyone recommend some sites to visit regarding the degaussing of ships and aircraft, particularly during the WWII period?

73,
Rick


On Jan 4, 2012, at 4:13 PM, Clarke, Tom AIR4.0P NATOPS wrote:

> 
>> I recall reading that the degaussing for ships in WWII was a pretty
> quick
>> and dirty affair.  They ran up to a dock and slapped a wire on the
> hull
>> and that was that.   Would doubt if the subs would use anything
> different.,
> 
> Well, I have here a rather poor quality pic of the DeGaussing
> Switchboard
> on the sub Lionfish at Battleship Cove. The plaque says it sends DC
> voltage through vertival and horizontal coils throughout the ship.
> 
> Hence my question- how do you adjust the thing?
> 
> ---------------tom sez------------------------
> 
> I am not sure how it is done on a sub, but when I was on a Minesweeper
> (MSC-195) we would go through the degaussing range at Norfolk or
> Charleston to measure the ships magnetic signature.  Adjustments were
> then made to the controller for the degaussing coils in the ship and we
> would run thru again until the signature was acceptable.
> 
> The controller was a box full of saturable reactors and mag amps that
> varied the current in the coils around the ship.  There was a device
> referred to as a "Total Field Magnetometer" up on the mast of the ship
> that measured the field around the ship and adjusted the coil currents
> as necessary.
> 
> Somewhat similar to the MAD head on a patrol aircraft. Since the idea is
> to measure the magnetic field of the earth for disturbances caused by
> the presence of a large chunk of ferrous metal, the system needed
> calibration to remove aircraft disturbances.  Any P-3 or P-2 folks on
> here will remember, fondly (or not!), MAD Comps, where we would pitch
> the aircraft up and down and do rolls without yawing.  Only the
> heartiest in the back would remain free from airsickness! Fun for the
> front office, though!
> 
> 73 Tom/W4OKW
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