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Air Data Computer CPU

Technical Information

Catalogue No: C1625
Category: Air Data
Object Type: Signal/Data Processor
Object Name: Air Data Computer CPU
Part No: 50-116-01
Serial No: 0001
Manufacturer: GEC Avionics
Division: Instrument Systems [ISD]
Platform(s): Draken J35 
Year of Manufacture: Unknown
Dimensions:
Width (mm):
190 
Height (mm):
195 
Depth (mm):
340 
Weight (g):
9,360 
Location: Main Object Store
Inscription(s):

M3161 418010
LUFTDATAENHET 8
GEC 50-110-01
0001
────────────────
SVID 0904

Notes:

Air Data Computer built for the Saab J35 Draken. The Draken was introduced in 1955 but went through many upgrades. This unit looks more similar to the SCADC systems of the 1980's so may have been introduced in an upgrade.

In 1981 Instrument Systems Division began the design of a new generation of Air Data Computers designed for the combined USAF and USN Standard Central Air Data Computer (SCADC) programme. The system was designed to fulfil the retrofit requirements of 38 different aircraft types and to do so with only four configurations. The aircraft types include the following:-

A-4M and TA-4J Skyhawk, A-6E/F, KA-6D and EA-6A Intruder, EA-6B Prowler, TC-4C Gulfstream, A-7D/E/K and TA-7C Corsair II, C-2A Greyhound, E-2C Hawkeye, KC-135 Stratotanker, C-5A/B Galaxy, C-141A/B Starlifter, F-111A/E/D/F, FB-111A, EF-111A, F-4C/D/E/G/J/N/S, and RF-4B/C Phantom and the S-3A/B and US-3A Viking. In 1992 an order for a further 290 units was received, being the eighth option, bringing the total procured to 5552 units. 387 units of the SCADC system were at this time being supplied for the F-14 Tomcat.

The high commonality was achieved with a unique software re-configurable design. Output parameters, ranges and scalings are selected for each aircraft type by the software, which recognises the host from a code wired into the aircraft connector pins. The SCADC core hardware set provides over 80% of the hardware in every application and the remainder is addressed by one or two special-to-type modules. A multiplicity of analogue interfaces can be handled and the Mil-Std 1553 DataBus is also a feature. Production commenced in 1985 with first deliveries the following year and in 1989 these deliveries surpassed 4,000 units. In addition in 1988 ISD received the Queen’s Award for Technological Achievement for SCADC.

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