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The EA-37B Compass Call (formerly EC-37B) is an electronic warfare aircraft based on the Gulfstream G550 entering service with the United States Air Force with the first example delivered on 23 August 2024 to Davis–Monthan Air Force Base for crew training. [1] The plane is replacing the EC-130H Compass Call.
Test flights began in April 1972; during testing, one of the prototypes stayed aloft for almost 28 hours, [2] however it failed to meet the Air Force's requirement of a 40,000 feet (12,000 m) service ceiling. [1] In 1973 The Model 845A was cancelled (along with the XQM-93), the program being replaced by Compass Cope. [3]
A magnetic compass aboard an aircraft displays the current magnetic heading of the aircraft, i.e., the aircraft's directional orientation relative to the Earth's geomagnetic field, which has a roughly north-south orientation. The compass can be used in turns to verify the aircraft is travelling in the desired direction at the conclusion of a turn.
The EC-130H Compass Call is an electronic attack aircraft flown by the United States Air Force. Based on the Lockheed C-130 Hercules , the aircraft is heavily modified to disrupt enemy command and control communications, perform offensive counterinformation operations, and carry out other kinds of electronic attacks.
On the HSI, the aircraft is represented by a schematic figure in the centre of the instrument – the VOR-ILS display is shown in relation to this figure. The heading indicator is usually slaved to a remote compass and the HSI is frequently interconnected with an autopilot capable of following the heading select bug and of executing an ILS ...
The norm describes the test procedure for airborne equipment. 8.0 Vibration: Aircraft type dependent test checks the effects of vibration and the equipment's ability to operate during all vibration scenarios. 9.0 Explosion proofness: These tests subject the test article to an environment under vacuum, with a gaseous mixture of combustibles.
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Indian Air Force Test Pilot School, Bangalore, India (founded 1957) U.S. Army Aviation Technical Test Center, currently based at Redstone Arsenal, Huntsville, Alabama, United States (founded 1957, as the U.S. Army Aviation Test Board based at Fort Rucker) [11] [12] China Flight Test Establishment, based at Xi'an, China (founded 1959) [13] [14]