Paul Voebel
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« on: March 22, 2011, 07:35:34 AM » |
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 Aircraft Detection Before Radar...
I bet none of you ever saw this stuff before.
How air attacks were detected before radar...
Old time
acoustic hearing aids
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Paul Voebel
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« Reply #1 on: March 22, 2011, 07:44:52 AM » |
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Paul Voebel
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« Reply #2 on: March 22, 2011, 07:50:46 AM » |
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 ACOUSTIC "EARS"
BEFORE RADAR - ON A SWIVEL |
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Paul Voebel
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« Reply #3 on: March 22, 2011, 07:52:02 AM » |
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Paul Voebel
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« Reply #4 on: March 22, 2011, 07:53:13 AM » |
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Paul Voebel
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« Reply #5 on: March 22, 2011, 07:54:41 AM » |
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 Go to The NEXT Page for More Pictures >>> |
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INFORMATION CLUB
