avia.wikisort.org - Engine

The Armstrong Siddeley Snarler was a small rocket engine used for mixed-power experiments with an early turbojet engine.[1][2] and was the first British liquid-fuelled rocket engine to fly.[3]

Snarler
Type	Rocket engine
National origin	United Kingdom
Manufacturer	Armstrong Siddeley
Major applications	Hawker P.1072

Design and development

Unlike other British rocket engine projects that used hydrogen peroxide as an oxidiser, Armstrong Siddeley's used liquid oxygen. The rocket engine is described as having a dry weight of 215 lbf (960 N) thrust of 2,000 lbf (8.9 kN) and a specific fuel consumption of 20 (lb/h)/lbf thrust.[3] Work began in 1947 and the final configuration was first tested on 29 March 1950.[3]

The prototype of the Hawker P.1040 Sea Hawk, VP 401, had a Snarler rocket of 2,000 lbf thrust added in its tail. The Rolls-Royce Nene turbojet, of 5,200 lbf thrust, had a split tailpipe which exhausted either side of the fuselage. The combination was termed the Hawker P.1072.[4][5]

This gave approximately[6] 50% greater thrust, although with twenty times the fuel consumption.[3] It was first used in flight on 20 November 1950, by Hawker's test pilot Trevor "Wimpy" Wade.[4] Half a dozen flights were made using the rocket motor before a minor explosion damaged the aircraft. Although methanol was used in the P.1072, jet fuel could be used for the Snarler. It was decided that reheat was a more practical proposition for boosting jet thrust than rockets.

An unusual feature of the engine was that the fuel/oxidiser pump was externally driven, by a drive from the gearbox of the P.1072's turbojet engine. This feature continued into the first versions of the subsequent Screamer engine, but was later replaced with a turbine-driven turbopump.[7]

Variants

ASSn.1 Snarler

The prototype and test engines, (Ministry of Supply designation ASSn.).

Applications

• Hawker P.1072

Specifications

Data from Aircraft engines of the World 1953,[8] Flight:6 August 1954:Armstrong Siddeley Snarler[9]

General characteristics

• Type: rocket engine booster
• Length: 94 in (2,400 mm) (overall length); 25.4 in (650 mm) (combustion chamber length)
• Diameter: 12.5 in (320 mm) (nozzle diameter)
• Dry weight: 215 lb (98 kg)
• Propellant capacity: 120 imp gal (140 US gal; 550 l) fuel; 75 imp gal (90 US gal; 340 l) oxidiser
• Fuel: 65% methanol, 35% water
• Oxidiser: liquid oxygen

Components

• Pumps: externally driven accessory gearbox mounted centrifugal pumps with de-aerators

Performance

• Thrust: 1,350–2,350 lbf (6.0–10.5 kN) at 20,000 ft (6,100 m) (dependent on main engine speed)
• Part thrust: 450–750 lbf (2.0–3.3 kN) at 20,000 ft (6,100 m) (dependent on main engine speed)
• Burn time:
• Thrust-to-weight ratio: 6.28–10.93 (part thrust: 2.09–3.49)
• Specific impulse: 195 seconds (1.91 km/s)
• Burn time: 2 minutes 45 seconds (Hawker P.1072 installation)
• Thrust specific fuel consumption: 20 lb/(lbf⋅h) (570 g/(kN⋅s))

See also

Related development

• Armstrong Siddeley Screamer

Related lists

• List of aircraft engines

References

На других языках

---

[de] Armstrong Siddeley Snarler

Der Armstrong Siddeley Snarler war ein kleines Raketentriebwerk, das der britische Hersteller Armstrong Siddeley für kombinierte Leistungsversuche zusammen mit einem frühen Strahltriebwerk baute.[1][2] Es war das erste flugfähige, britische Raketentriebwerk für Flüssigtreibstoff.[3] Anders als andere britische Raketentriebwerkskonstruktionen, die Wasserstoffperoxid als Oxidationsmittel verwendeten, verarbeitete das von Armstrong Siddeley Flüssigsauerstoff. Der Snarler hat ein Trockengewicht von 97,6 kg, einen maximalen Schub von 8,9 kN[4] und einen spezifischen Treibstoffverbrauch von 2040 kg/kN x h.[3] Die Konstruktion begann 1947 und die Flugerprobung des endgültigen Triebwerks wurde am 29. März 1950 durchgeführt.[3]

---

- [en] Armstrong Siddeley Snarler

---

[fr] Armstrong Siddeley Snarler

L’Armstrong Siddeley Snarler était un petit moteur-fusée à ergols liquides britannique, conçu à la fin des années 1940 par le constructeur Armstrong Siddeley. Premier moteur-fusée britannique de ce type, il avait pour but de mener des expériences de « propulsion mixte » en étant combiné avec un turboréacteur et devait également servir d'accélérateur pour de futurs chasseurs[1],[2].

---

---