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2017-11-20

ENGINES
 
  THE  METROVICK  F.2/4 BERYL  ENGINE  
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Started during the second world war, the Metrovick axial flow turbojet matured into several iterations.  In particular, the MV F.2/4 Beryl initially developed 3,250 lbf as test flown before being installed in the Saunders-Roe SR.A/1 flying boat fighter at which time it was rated at 3500.lbf of thrust.

Further improvements allowed the 3rd prototype to reach 3850 lbf before settling at 4000 Lbf.

Development of the SR.A/1 ended in 1947, ending the development of the Beryl engine, and Metrovick sold their jet engine activities to Armstrong Siddeley the same year.  Eventually, the design lead to the AS Sapphire.  Specifications :

  F.2/2 F.2/4 Beryl F.3 F.5
Length 4039.mm 4039mm 3556.mm 3715.mm
Diameter 887.mm 932.mm 1168.mm 1676.mm
Weight 1500.lbs 1750.lbs 2300.lbs 2200.lbs
Thrust 2400.lbf 3500.lbf 4000.Lbf 4710.lbf
SFC 1.070 lb/lbf/hr 1.050 lb/lbf/hr 0.650 lb/lbf/hr 0.615 lb/lbf/hr