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The Rolls-Royce Exe, or Boreas,[1] was a 24-cylinder air-cooled X block sleeve valve aircraft engine intended primarily for the new Fairey Fleet Air Arm aircraft, particularly the Fairey Barracuda. The Exe was relatively powerful for its era, producing about 1,100 hp (820 kW). This is notable given the relatively small 1,300 cubic inches (22 L) displacement, the Merlin requiring 1,600 cubic inches (27 L) for approximately the same power level. The X-24 layout made this quite a compact engine.

Exe
Type Piston X-24 aero-engine
National origin United Kingdom
Manufacturer Rolls-Royce Limited
First run September 1936
Major applications Fairey Battle
Developed into Rolls-Royce Pennine

The Exe was named after the River Exe, although Rolls-Royce later transferred the use of river names to its gas turbine engines.


Design and development


The Exe was under development in 1939, having been started in the 1930s, along with the Peregrine and Vulture. Work on the Exe was suspended in August 1939,[2] and stopped about August 1940.[3] Ernest Hives, head of the Rolls-Royce aero engine division, wanted to stop work on the Exe, Peregrine, and Vulture to concentrate on the Merlin and Griffon engines. An enlarged version, the Rolls-Royce Pennine, was built later in the war, but cancelled as jet engines became the company's focus.

Originally intended for the Supermarine Type 322 and Fairey Barracuda the Exe was only test flown in a Fairey Battle, the first flight taking place on 30 November 1938. This aircraft continued in use for some time as a communications aircraft where the Exe was noted to be quite reliable in service.[4]


Applications



Specifications (Exe)


Data from Gunston and Lumsden.[5][6]

General characteristics

Components

Performance


See also


Related development

Comparable engines

Related lists


References



Notes


  1. This name was dropped due to conflict with the Bristol Aeroplane Company's series of Greek mythology named engines, Lumsden 2003, p.201.
  2. Lloyd 1978, p4-5.
  3. Pugh 2000, p.263-265.
  4. Rubbra 1990, p.148.
  5. Gunston 1989, p. 142.
  6. Lumsden 2003, p.201.

Bibliography





На других языках


[de] Rolls-Royce Exe

Der Rolls-Royce Exe (ursprünglich Rolls-Royce Boreas) war ein Flugmotor des britischen Herstellers Rolls-Royce, der von den dort sonst geltenden Konstruktionslinien weit abwich.
- [en] Rolls-Royce Exe

[it] Rolls-Royce Exe

Il Rolls-Royce Exe, chiamato anche Rolls-Royce Boreas, era un motore aeronautico sperimentale 24 cilindri ad X raffreddato ad aria, realizzato dalla britannica Rolls-Royce Limited negli anni trenta.

[ru] Rolls-Royce Exe

Роллс-Ройс Экс (англ. Rolls-Royce Exe) или Борей[1] (англ. Boreas) — 24-цилиндровый X-образный двигатель воздушного охлаждения, разрабатывавшийся, в первую очередь, для нового палубного ударного самолёта Fairey Barracuda. Exe развивал достаточно большую для своего времени мощность (около 1100 л.с.), имел высокие удельные показатели (рабочий объём всего 22 литра, в то время как у Merlin сопоставимой мощности он равнялся 27 литрам) и был довольно компактен благодаря Х-образной компоновке.



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