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2017-11-20

ENGINES

DB600 Series

DB601A

DB601N

DB603

DB605A

DB605AM


  Article  

Reproduced from : http://kurfurst.org/index.html
     
     
 

DB603

 
     
     

The Daimler-Benz DB 603 engine was a German aircraft engine used during World War 2. It was a liquid-cooled inverted V12 engine, and an enlargement of the DB 601,  which was in itself a development of the DB 600.   Production of the DB 603 commenced in May 1942.   The DB 603 powered several aircraft, including the Do 217, Do 335, He 219, He 177B, Me 410 and Ta 152C.

Design and development

The Mercedes-Benz T80 land speed record car, designed by aircraft engineer Josef Mickl with assistance from Ferdinand Porsche and top German Grand Prix racing driver Hans Stuck, incorporated the third prototype DB 603. It ran on pure alcohol with MW injection and was tuned to 3,000 hp (2,200 kW)  enough, it was believed, to propel the aerodynamic three-axle T80 up to 750 km/h on the Dessau autobahn in January 1940 during Rekord Woche (Record/Speed Week). Due to the outbreak of the war in September 1939, the T80 (nicknamed Schwarz Vogel, "Black Bird") never raced. The DB 603 engine was removed from the vehicle for use in fighter aircraft.

Variants Production versions

  • DB 603A, rated altitude of 5.7 km, B4 fuel
    Power (max)  : 1287 kW (1750 PS) at 2700 rpm at sea level
    Combat power: 1162 kW (1580 PS) at 2500 rpm at sea level

  • DB 603AA DB 603A with rated altitude of 7.3 km, B4 fuel
    Power (max)   : 1228 kW (1670 PS) at 2700 rpm at sea level
    Combat power: 1162 kW (1580 PS) at 2500 rpm at sea level

  • DB 603E rated altitude of 7.0 km, B4 fuel
    Power (max)   : 1324 kW (1800 PS) at 2700 rpm at sea level
    Combat power: 1158 kW (1575 PS) at 2500 rpm at sea level

Prototypes and other versions

  • DB 603D, a DB 603A with propellers rotating counter-clockwise; production unknown

  • DB 603F, a DB 603E with propellers rotating counter-clockwise; production unknown

  • DB 603G (production cancelled)
    Power (max)   : 1397 kW (1900 PS) at 2700 rpm at sea level
    Combat power: 1147 kW (1560 PS) at 2700 rpm at sea level

  • DB 603L/LA (prototype with two-stage supercharger, B4 fuel)
    Power (max)   : 1471 kW (2000 PS)

  • DB  603N (prototype with two-stage supercharger, C3 fuel)
    Power (max)   : 2059 kW (2800 PS) at 3000 rpm at sea level
    Power cont.     : 1420 kW (1930 PS) at 2700 rpm at sea level

  • DB  603S (DB 603A with experimental TK-11 turbo-supercharger)
    Power (max) : not known.

  • DB 613 Series of experimental "power system" coupled side-by-side twinned DB 603s, arranged as the DB 606 and DB 610 had been previously, and meant to replace the 606 and 610, in prototype form only from March 1940 through 1943.
    Power (max) : not known

All power data is given in metric horsepower as stated per manufacturer. Power (max) is Takeoff and Emergency power (5-min-rating), combat power is climb and combat power (30-min rating), continuous is without time limit.

Specifications (DB 603A)

Data from Jane's

General characteristics

  • Type: 12-cylinder liquid-cooled supercharged inverted Vee aircraft piston engine

  • Bore: 162 mm (6.38 in)

  • Stroke: 180 mm (7.09 in)

  • Displacement: 44.52 L (2,716.9 in3)

  • Length: 2610.5 mm (102.8 in)

  • Diameter: 830 mm (32.7 in)

  • Dry weight: 920 kg (2,030 lb)

Components

  • Supercharger: Gear-driven centrifugal type supercharger

  • Fuel system: Direct fuel injection

  • Cooling system: pressurized water cooling

Performance

  • Power output:

    • 1,287 kW (1,750 PS) for takeoff

    • 1,111 kW (1,510 PS) maximum continuous

  • Specific power: 26.7 kW/L (0.59 hp/in)

  • Compression ratio: 7.5:1 left block, 7.3:1 right block

  • Specific fuel consumption: 0.288 kg/(kWh) (0.474 lb/(hph))

  • Power-to-weight ratio: 1.29 kW/kg (0.79 hp/lb)

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