Walter Major

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The Walter Major is an aircraft engine from the Czechoslovak manufacturer Walter Motors as It was produced as a four-cylinder ( Major 4 ) from 1933 and a six-cylinder ( Major 6 ) from 1934.

construction

The Walter Major is an air-cooled four-stroke in - line engine . The suspended cylinders , each provided with two valves, consist of steel liners with bolted light metal heads . They are controlled by a camshaft in the crankcase via bumpers and rocker arms. The crankshaft with light metal connecting rods runs in plain bearings . The six-cylinder version has two carburettors in contrast to the four-cylinder engine, which has only one.

commitment

Furthermore, the Waltor Major was used in several types of aircraft by Beneš-Mráz . In detail, these were the Be-52, Be-56, Be-250, Be-251, Be-502 (Major 4) and Be-156 (Major 6).

Technical specifications

Parameter Walter Major 4-I Walter Major 6-I
drilling 118 mm
Hub 140 mm
Cylinder displacement 1.5 l k. A.
Total displacement 6.1 l 9.2 l
Degree of compaction 5.2
length 1180 mm k. A.
width 510 mm 490 mm
height 770 mm 800 mm
rated capacity 120 hp (88 kW) at 2100 rpm 190 hp (140 kW) at 2100 rpm
Full performance 130 hp (96 kW) at 2350 rpm 205 hp (151 kW) at 2350 rpm
Dry weight
without hub		 142 kg 181 kg
Power to weight ratio 1.09 kg / hp k. A.
Displacement 21.2 hp / l k. A.
Fuel consumption 30.5 kg / h at 120 hp 48.5 kg / h at 190 hp
Lubricant consumption 1.5 kg / h at 120 hp 1.8 kg / h at 190 hp
Octane number 73

literature

  • Werner von Langsdorff : Handbook of aviation . Born in 1939. 2nd, unchanged edition. J. F. Lehmann, Munich 1937, p. 532/533 and 562 .