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{{Short description|Type of aircraft radar}}
'''AN/APQ-13''' radars were a ground scanning radar developed by Bell, Western Electric, and MIT as an improved model of the airborne [[H2X radar]]. They were used on [[B-29]]'s during [[World War II]] in the [[Pacific war|Pacific theater]] for high altitude area bombing, search and navigation. Computation for bombing could be performed by an impact predictor. A range unit permitted a high degree of accuracy in locating beacons. The [[radome]] was carried on the aircraft belly between the bomb bays and was partially retractable on early models. The radar operated at a frequency of 9375 ± 45 megahertz and used a [[superheterodyne receiver]]. ▼
{{Use dmy dates|date=January 2024}}
[[File:Boeing SB-29.jpg|thumb|[[Boeing B-29 Superfortress variants#SB-29|Boeing SB-29 "Super Dumbo"]] with AN/APQ-13 radome between the nose landing gear and the airborne lifeboat]]
▲The '''AN/APQ-13'''
==
The AN/
The last operational APQ-13 was removed from the [[Fort Sill|Fort Sill, Oklahoma]] post weather station in October 1977 for display at what is now the [[National Museum of the United States Air Force]].
▲The AN/AQP-13 radar was the first military radar converted to civilian use as a weather warning radar. About 30 systems were converted, starting in late [[1945]]. They were installed at military bases.<ref name="HEM">Historical Electronics Museum [http://www.hem-usa.org/past-gallery.shtml <http://www.hem-usa.org/past-gallery.shtml>].</ref>
The AN/APQ-13 weather radars were generally replaced by the [[AN/CPS-9]], which was specifically designed as a weather radar.<ref name="HEM"
▲The last operational APQ-13 was removed from the [[Fort Sill|Fort Sill, Oklahoma]] post weather station in October 1977 for display at what is now the [[National Museum of the United States Air Force]]. The museum intended to display it in its original configuration as a navigation and bombing radar, but would note the radar's much longer history as an operational weather radar.<ref name="amsrad">Roger C. Whiton, et al. "History of Operational Use of Weather Radar by U.S. Weather Services. Part I: The Pre-NEXRAD Era." <u>Weather and Forecasting</u>: Vol. 13, No. 2, pp. 219–243. 19 Feb. 1998. American Meteorological Society. 5 Apr. 2006 [http://ams.allenpress.com/amsonline/?request=get-document&doi=10.1175%2F1520-0434(1998)013%3C0219:HOOUOW%3E2.0.CO%3B2 <http://ams.allenpress.com/amsonline/?request=get-document&doi=10.1175%2F1520-0434(1998)013%3C0219:HOOUOW%3E2.0.CO%3B2>].</ref>
==See also==
▲The AN/APQ-13 radars were generally replaced by the [[AN/CPS-9]], which was specifically designed as a weather radar.<ref name="HEM" />
*[[List of radars]]
*[[List of military electronics of the United States]]
==
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{{US wx radar}}
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[[Category:Aircraft radars]]
[[Category:Military
[[Category:World War II radars]]
[[Category:Weather radars]]
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[[Category:Boeing B-29 Superfortress]]
[[Category:Military equipment introduced from 1940 to 1944]]
[[Category:Military electronics of the United States]]
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