Bristol Thor

Short description: 1950s British ramjet missile engine

Thor

Bristol Thor modified for display purposes
Type  | Ramjet
National origin | United Kingdom
Manufacturer  | Bristol Aero Engines
First run  | 1950
Major applications | Bristol Bloodhound

The Bristol Thor, latterly Bristol Siddeley BS.1009 Thor, was a 16-inch (41 cm) diameter ramjet engine developed by Bristol Aero Engines (later Bristol Siddeley Engines) for the Bristol Bloodhound anti-aircraft missile.

Although Bristol Aero Engines acquired ramjet technology from the US company Marquardt, BAE put considerable effort into developing the Thor unit,[1] including the construction of a high altitude test plant (HATP) at their Patchway site, with a supersonic test cell.

The Bloodhound Mk.1 could attain a speed of Mach 2.2, while the Mk.2 was capable of just over Mach 2.7.[2]

Engine identification plate

## Contents

* 1 Variants
* 2 Specifications (BT.2 Thor)
* 2.1 General characteristics
* 2.2 Components
* 2.3 Performance
* 3 Notes
* 4 References

## Variants

BT.1 Thor

BT.2 Thor

BT.4 Thor

BS.1009 Thor

## Specifications (BT.2 Thor)

Data from [3]

#### General characteristics

* Type: Ramjet
* Length: 103.9 in (2,639 mm)
* Diameter: 15.75 in (400 mm)
* Dry weight:

#### Components

* Compressor:

#### Performance

* Maximum thrust: (BT.1) – 5,275 lbf (23 kN) at M2.0 at sea level[4]
* Specific fuel consumption: 2.5 lb/(lbf h) (254.84 kg/(kN h)) at full thrust at sea level
* Power-to-weight ratio:

## Notes

1. ↑ "British Ramjets". Flight 70 (2481): 212–213. 10 August 1956. https://www.flightglobal.com/pdfarchive/view/1956/1956 - 1066.html.
2. ↑ "Bristol Thor Ramjet Engine". RAF. http://www.raf.mod.uk/rafhalton/rafcms/mediafiles/F0B9097F_5056_A318_A84B559FC2A2D097.doc. Retrieved 14 November 2015.
3. ↑ Taylor, John W.R. FRHistS. ARAeS (1962). Jane's All the World's Aircraft 1962-63. London: Sampson, Low, Marston & Co Ltd.
4. ↑ "Aero Products". http://2.bp.blogspot.com/-V3Beb9Gt6oY/TmUWK2O0ALI/AAAAAAAAAyQ/qsQEbOv44u4/s1600/1960+Aero+Products+Proteus+%2B.jpg. Retrieved 23 March 2013.

## References

* Taylor, John W.R. FRHistS. ARAeS (1962). Jane's All the World's Aircraft 1962-63. London: Sampson, Low, Marston & Co Ltd.

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