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SCR-584 radar
Videos
The SCR-584 was an automatic-tracking microwave radar developed by the MIT Radiation Laboratory during World War II. It was one of the most advanced ground-based radars of its era and became one of th
Exterior view. All operational equipment was housed inside, although the M-9 director and electrical generators were separate. The antenna retracts in
Exterior view. All operational equipment was housed inside, although the M-9 director and electrical generators were separate. The antenna retracts into the van for travel.
Field deployment of the SCR-584 on Peleliu during World War II. The high elevation angle of the dish combined with a lack of visible activity suggests
Field deployment of the SCR-584 on Peleliu during World War II. The high elevation angle of the dish combined with a lack of visible activity suggests that the radar is in its helical scan mode.
Operators console for the SCR-584
Operators console for the SCR-584
M9 gun director
Videos
The M9 gun director was an electronic director developed by Bell Labs during World War II. This computer continuously calculated trigonometric firing solutions for anti-aircraft weapons against enemy
SCR-584 radar
…gun-laying computer that could use electrical, as opposed to mechanical, inputs for pointing data. Bell Labs delivered an analog computer known as the M9 Gun Director for this role. The M9 had four sets of outputs, allowing a single M9 to control four of the Army's standard 90 mm M1 guns. The entire system, including…
A US 90 mm anti-aircraft gun and crew during a demonstration at Bell Laboratories in 1943. The M9 gun director can be seen in the center background of
A US 90 mm anti-aircraft gun and crew during a demonstration at Bell Laboratories in 1943. The M9 gun director can be seen in the center background of the photo.