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SCADC CPXXX1 (Space Model)

Technical Information

Catalogue No: C1472
Category: Air Data
Object Type: Signal/Data Processor
Object Name: SCADC CPXXX1 (Space Model)
Part No: 50-055-01
Serial No: Model
Manufacturer: GEC Avionics
Division: Instrument Systems [ISD]
Platform(s): A-6 Intruder
Year of Manufacture: circa 1981
Dimensions: Width (mm): 190
Height (mm): 190
Depth (mm): 305
Weight (g): 3,950
Location: Rack RAA10 [Main Store]

Marconi Avionics
Part No. 50-055-01


This is a space moel of the CPU-140A (CPXXX1) fitted to the A-7, A-4, E-2, A-6 and C-2 aircraft. The box has 83% of the common SCADC modules, two Sensors (Static and Total Transducer Assembly) a Power Supply Module and a number of Electronic Modules.

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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