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Civil HUD Overhead Unit

Technical Information

Catalogue No: C0055
Category: Head-Up Display [HUD]
Object Type: Display Unit
Object Name: Civil HUD Overhead Unit
Part No: 229-061301
Serial No: 2022-0001
Manufacturer: BAE Systems
Division: Unknown
Platform(s): Gulfstream IV 
Year of Manufacture: circa 1992
Width (mm):
Height (mm):
Depth (mm):
Weight (g):
Location: Mezzanine Store

MCAB Overhead Unit
S/N 2022-0001


Development of a hub-and-spoke network increases the importance of keeping an airline's home runways open. Rather than wait for the US Federal Aviation Administration to upgrade the landing aids at airports, airlines in the USA in the early 1990s began to look at what could be done to their aircraft to enable them to land in low visibility.

The most promising solution appeared to be a system to enhance the pilot's ability to see the runway in fog. An enhanced vision system (EVS) comprises a head-up display (HUD) onto which is projected an image of the runway from an infra-red (IR) sensor or millimetre-wave (MMW) radar. The enhanced image allows the pilot to recognise the runway from a greater distance and to continue the approach, rather than divert.

Installation of a HUD in the cockpit overhead area was generally preferred. Overhead Projection Units were developed by the Company and in 1992 a HUD was test flown at the Maryland Advanced Development Laboratory on their Gulfstream II testbed aircraft. This HUD dates from 1992 and is an overhead unit with a Combiner designed to fold away when not required or to flip forward in the event of head impact. It was made from F-16 and C-17 components for the FAA Enhanced Vision System which was fitted to the Gulfstream II. It was known as the Maryland HUD.
This is an early Overhead Unit fitted to the Gulfstream IV.

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