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Viper™ II Module

Technical Information

Catalogue No: C0380
Category: Head-Mounted Equipment [HMD/NVG/Glasses]
Object Type: Module/Sub-Assembly/Component
Object Name: Viper™ II Module
Part No: 229-055933-CP
Serial No: 0805/04 #2
Manufacturer: Unknown
Division: Unknown
Year of Manufacture: 1994
Width (mm):
Height (mm):
Depth (mm):
Weight (g):
Location: Main Object Store

Date: 26-5-94
Wt. 60grms
Serial No: 0805/04 #2
Part No: 229-055933-CP


In 1992 the Viper™ family of HMD’s was commenced comprising a range of visor projected systems from the Monocular Viper™ I, to the Binocular Viper™ II. The family of helmet systems has now been renamed Striker®.
Viper™ II is a lightweight binocular visor projected Helmet Mounted Display from the early 90’s.The visor combines and reflects dynamic flight data symbology and raster information to the pilot, projected from two high efficiency miniature “1 inch” CRT displays via two optical relay assemblies. The highly efficient optical design allows the use of a standard spherically curved aircrew visor, with a 70% transmission neutral density partially reflecting combiner coating. The visor coating ensures high display brightness, while maintaining high real world transmission with no colouration. Use of a spherical visor shape means display accuracy is insensitive to visor rotation, thus enabling partial raising of the visor and still maintaining an accurate display. It provided 40° FOV with full overlap, a 15-mm exit pupil, and a 70-mm eye relief. Excluding the oxygen mask, it weighed 4.2 lbs (1.9 kg).
The Viper™ II display module can be fitted to all sizes of USAF and USN fixed wing helmets and uses existing liner systems. The optical relay system for each eye channel can be adjusted for individual inter-pupillary settings with no changes or modifications to the visor. When coupled to a suitable Head Tracking System, such as the GEC-Marconi Avionics DC Magnetic System, the Viper™ II system can provide full space stabilised symbology and video pictures.
The HMD was cleared for jet flight test (500 Knot) & test flown on AV-8B (IHAVS), UK Tornado (TIARA), GAF Tornado.
This module is a windblast test module. The weight on the label may only refer to part of the assembly since it is so much less than the measured weight of this item.

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