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Forum: Rotorheads
21st Jul 2017, 14:41
Replies: 64
Views: 31,098
Posted By Fareastdriver

Way back in the seventies infra red Night Sun was...

Way back in the seventies infra red Night Sun was being trialled. This took the form of a filter over the normal lamp which made the beam invisible apart from those wearing I/R night vision goggles....
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