Armstrong Siddeley Viper

Armstrong Siddeley Viper

The Armstrong Siddeley Viper is a turbojet engine that was developed and built by the British company Armstrong Siddeley . Since the company later merged into Bristol Siddeley and Rolls-Royce , the engine was also known as the Bristol Siddeley Viper or Rolls Royce Viper.

history

The engine's first test runs took place in 1951. It was put into service in 1953 and was used in the Royal Air Force's HS.125 / BAe-125 Dominie training aircraft until January 2011 . It was originally developed as a simple, inexpensive "lost device" to drive the Australian "Jindivik" target display drones , but was later developed into a standard engine through the use of better materials. The original ASV.3 with 1640 lb thrust, as a "Jindivik" drive, only had a planned service life of ten hours. The later models ASV.5 and ASV.6 (with 1900 lb thrust), as well as the version ASV.8 with 1750 lb thrust, were designed for a much longer service life due to the improvements and new materials. Improvements made by the Sapphire resulted in the ASV.11 with 2460 lb thrust and the weaker ASV.10 with 2000 lb thrust for a longer service life. The Viper 20 and the Viper 30 were added later. In total, more than 5500 engines of this type were built.

commitment

Aermacchi MB 339 Aermacchi MB 326 as ASV.8 Avro Shackleton BAC Jet Provost BAC Strikemaster Embraer AT-26 Xavante GAF Jindivik Hawker Siddeley Dominie

Handley Page HP.115 IAR-99 Piaggio PD.808 Saunders-Roe SR.53 Soko J-22 Orao / IAR-93 Soko G-2 Galeb Soko G-4 Super Galeb

Technical specifications

The Viper is a smaller version of the Sapphire engine. The single-shaft engine has a seven-stage compressor, an annular combustion chamber with twelve injection nozzles and a single-stage turbine. Depending on the variant, a thrust between 8.9 and 17.8 kN was achieved.

Parameter	Viper ASV.5
length	1674 mm
diameter	627 mm
compressor	seven stages
turbine	single stage
Weight	249 kg
Max. thrust	1640 lb
Max. rotational speed	13,400 min -1
Compression ratio	3.5: 1

Web links

Commons : Bristol Siddeley Viper  - Collection of images, videos and audio files

• Rolls-Royce - Viper ( Memento from November 20, 2008 in the Internet Archive )

Individual evidence

1. ↑ Rolls-Royce Viper 50th Anniversary ( Memento of the original from June 1, 2011 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. 
2. ↑ Dominie T1 www.raf.mod.uk. accessed: November 4, 2014
3. ↑ ASV.11
4. ↑ ASV.3 and ASV.5