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Aviation History
1946
1946 - 1810.PDF
2?,O FLIGHT SEPTEMBER 12TH, 1946 PISTON ENGINES DISPLAYED MONACO. (Left) Expressly de-signed for cheap production allied to performance and reliability,this new British flat-four should have a very useful future before it. cylinder horizontal-H sleeve-valve supercharged Sabre VII, which is the highest-powered liquid-cooled aircraft engine in the world. Quite aside from its extremely ingenious layout, this unit is particularly outstanding for its com- pactness, economy, and for its values of specific power and weight, respectively 85 b.h.p./litre and 0.82 lb/b.h.p. Bore and stroke 5.0;n x 4.75in Capacity 36.7 litres Max. power 3,l|Ob.h.p. R.P.M ,. ... 3,850 Boost 17.25 (b./sq. in. Altitude 1,850ft Fuel cons. 0.573 ptjb.h.p.|hr. Methanol/woter cons 0.188 pt|b.h.f>.|hr. Max. cont. cruise power (w.m.) ... 1,857 b.h.p. R.P.M 3,250 Boost 7lb/s<J. in. Altitude 9,100ft Fuel cons. 0.56 pt/b.h.p.|hr. Weight, net dry 2,540 Ib Rolls-Royce, Limited, are showing the Merlin 620 power plant and a sectionalised "working" model of the Grif- fon—latest and most powerful of Rolls-Royce piston en- gines. Both of these exhibits are V 12 cylinder, 2-speed, 2-stage supercharged liquid-cooled engines, although of differing capacities and power outputs. The Merlin 620 power plant is especially interesting since it has been adopted by Trans-Canada Air Lines for their fleet of American Douglas D.C.4-M aircraft. The Griffon, although of greater capacity than the Merlin, is only very slightly bigger dimensionally, and is of the same bore and stroke as the famous "R" engines which powered the Schneider Trophy winners. To-day it is fitted to the Spit- fire 12, 14 and 21 ; Spiteful; Firefly II, IV and Trainer; and the Martin-Baker fighter. Merlin 620 Bore and stroke ... 5.4in x 6.0in Capacity 27 litres Max. power 1,795 b.h.p. R.P.M 3,000 Boost 20/b/sn. in. Altitude 4,500ft Fuel cons. 0.669 pt./b.h.p.lhr Max. cont. cruise power... ... 1,175 b.h.p. Griffon 67 6.0in x 6.6in 36.7 litres 2,375 b.h.p. 2,750 25 (b/sq. in. 1,250ft 0.8 pt/b.h.p./hr. 1.305 b.h.p. SABRE VII. Famous engine of Typhoon and Tempest, this most powerful engine of its type in the world is also used to power the new Hawker Fury fighter. R.P.M. ... Boost Altitude ... Fuel cons. Weight, net d'y Merlin 620 2,650 9 Ibjsq. in.10,250ft I.5l7pt./b.h.p. hr. 1,745 Ib Griffon 61 2,400 7 /b/so. in.12,250ft 0.595 f.t/b.h.p./hf. 1,980 Ib GRIFFON 67. The largestpiston engine made by Rolls- Royce, this unit is remarkable for the veryhigh maximum boost pressure it takes and for ' its economy in relation to power range. MERLIN 620. Latest version of what is without doubtthe most famous engine of all time, the new 620 in complete power-plant form FORTHCOMING EVENTS Se?t. 12th- 15th.—S.B.A.C. Exhibition and Flying Dis- play, Handley Page Airfield, Radlett, Herts. Sept. 15th.—R.Ae.S. Garden Party, Handley Page Airfield, Radlett, Herts. Sept. 17th.—Air trip to Jersey for junior members of Air League. Sept. 22nd.—" Danish Flying Day." (Invitation from Danish Clubs.) Sept. 26th.—Glasgow Branch of R.Ae.S. " lecturette " meetinp," Prestwick Airport, 7.30 p.m. Sept. 28th.—R.Ae.S. Graduates' and Students' .Section visit to aerodynamics Section, National Physical Labo' tory, Teddington. Sept. 28th—Isle of Wight Branch of the Air League ; Air Display at Somerton Airfield. Oct. 2nd.—Reading branch, R.Ae.S., " Structural Research,' by Prof. R. G. Pugsley. Oct. 4th.—Reunion dinner, H.Q. 214 Group, R.A.F., Holborn Restaurant, London, 6.15 p.m. Nov. 2nd.—Reunion of 205 Group, R.A.F., London. (De- tails later). Nov. 6th.—Reading branch, R.Ae.S. Film lent by High Duty Alloys, Ltd. Nov. 15th.—Paris Aero Show, Grand Palais, Champs Elysees. Nov. 15th.—Glasgow Engineering Exhibition, Kelvin Hall, opens. Dec. 4th—Reading Branch R.Ae.S. Annual Meeting. Jan. 4th, t947—Reading Branch R.Ae.S. Dinner Dance.
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