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Japanese radar?

 
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Japanese radar? - 2/19/2012 10:37:12 PM   
crsutton


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I can't find a reference. Does anyone know if they developed a functioning PPI display?

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RE: Japanese radar? - 2/20/2012 7:00:53 AM   
CT Grognard

 

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The Japanese Army search radar sets were designed to be simple to use - they usually only had a single A-oscilloscope showing range. Bearing was deduced by "guesstimating" at what point the maximum signal was received. The height-finders (Tachi-20 and Tachi-35) were more elaborate, where the procedure was to resort to pip matching on an azimuth and elevation oscilloscope.

The Japanese Navy shipborne radar had two cathode ray tubes, one called the "indicator for warning" showing all target echoes up to 60km (range pips generated by shock exciting a crystal appearing every 5km with a 3-microsecond range pulse moving along as the range crank is turned) and a second "range operator's oscilloscope" giving an expanded range of about 1,000m of the range as selected by the range crank. The true range was then read on a dial when the target pip's leading edge was set just even with a vertical line inscribed up the face of the tube. Range was about 25km on a battleship.

Here's a handy article: http://dreadnoughtproject.org/friends/dickson/Japanese%20Radar%20Short%20Survey.pdf


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RE: Japanese radar? - 2/20/2012 7:02:01 AM   
CT Grognard

 

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To answer the question: No, I don't believe they developed a functioning position plan indicator.

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RE: Japanese radar? - 2/20/2012 4:37:30 PM   
Shark7


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Here is a pretty good reference for Japanese radar types: http://www.combinedfleet.com/radar.htm

You may note that the actual in service date listed on the site differs from WiTP, but WiTP takes into account its widespread deployment.

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RE: Japanese radar? - 2/20/2012 7:27:48 PM   
crsutton


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Thanks, I thought so but was not sure. One of the reasons that comparing Japanese radar to Allied radar is like comparing muskets to rifles. Not having a functioning PPI screen would really limit radar in a shifting tactical situation.

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RE: Japanese radar? - 2/20/2012 11:23:40 PM   
mdiehl

 

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No PPI display in any Japanese radars during WW2.

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RE: Japanese radar? - 2/21/2012 10:08:37 PM   
dr.hal


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Wow the first inkling of a technology gap!

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RE: Japanese radar? - 2/21/2012 11:29:34 PM   
crsutton


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Yep, I am thinking it is like having trucks with wooden tires.....


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RE: Japanese radar? - 2/22/2012 3:21:27 PM   
bjmorgan


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quote:

ORIGINAL: crsutton

Yep, I am thinking it is like having trucks with wooden tires.....


Well, it cuts down on the number of flats, but you have to change the tire more often even without the flats. Bummer.

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