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Hispano-Suiza 12Y

January 05, 2023

The Hispano-Suiza 12Y was an aircraft engine produced by Hispano-Suiza for the French Air Force before the Second World War. The 12Y became the primary French 1,000 hp (750 kW) class engine and was used in a number of famous aircraft, including the Morane-Saulnier M.S.406 and Dewoitine D.520.

12Y
Type V-12 piston aero engine
National origin France
Manufacturer Hispano-Suiza
First run 1932
Major applications
Developed from Hispano-Suiza 12X
Developed into Hispano-Suiza 12Z

Its design was based on the earlier, and somewhat smaller, 12X. The 12X did not see widespread use before the 12Y replaced it and became one of the most powerful French designs on the eve of the war. The 12Z was being designed but this was ended by the fall of France and the German occupation.

The 12Y was produced under Hispano-Suiza licence in the Soviet Union as the Klimov M-100. This design led to the highly successful Klimov VK-105 series that powered the Yakovlev and Lavochkin fighters as well as the Petlyakov Pe-2 bomber. Licensed production of the early models was also undertaken in Czechoslovakia as the Avia HS 12Ydrs and in Switzerland as the HS-77.

Design and development

Early development

The 12Y was a fairly traditional in construction, a 36-litre water-cooled V-12 with the two cast aluminium cylinder banks set at 60 degrees to each other. The cylinder heads were not removable, instead both cylinder banks could be quickly removed from the crankcase section of the engine. This made it somewhat famous for being leak-proof, a design feature that was considered by other designers and almost became a part of the Rolls-Royce Merlin.

The major design change from the earlier 12X was to use a master-articulated connecting rod system, instead of the fork-and-blade type. A single overhead camshaft (SOHC) drove the valves, which were filled with liquid sodium for cooling. Only a single intake and exhaust valve were used, unlike most designs of the era which had moved to three or four valves per cylinder. A single-stage, single-speed supercharger was standard, although the art of designing a useful intake was not as well developed as in other countries, and high altitude performance was always lacking.

The first 12Y test articles were constructed in 1932, and almost immediately the entire French aviation industry began designing aeroplanes based on it. At the time the engine developed only 760 hp (570 kW), but it was clear it had potential to the 1,000 hp (750 kW) class. An early modification led to the Hispano-Suiza 12Ycrs which used a hollow propeller shaft to allow a 20 mm cannon to fire through the propeller spinner (a combination known as a moteur-canon). All later versions shared this feature. The 12Ydrs was the next major series, with a basic rating of 836 hp (623 kW) at sea level with a compression ratio of 5.8:1.

The Armée de l'Air changed their nomenclature, so the next version was the Hispano-Suiza 12Y-21, which increased the compression ratio to 7:1, when running on 100 octane gasoline. This boosted power to 867 hp (647  kW). In 1936 the connecting rod design was changed slightly to create the 12Y-31, but the lower 5.8:1 compression ratio was retained and the power was increased only slightly over the drs model to 850 hp (630 kW). Nevertheless, this became one of the most used engine designs of the pre-war era, used in almost all French fighter designs and prototypes.

 
12 Ybrs showing valve gear

Late variants

A real effort to improve the performance of the engine in 1938 resulted in the Hispano-Suiza 12Y-45, which used the S-39-H3 supercharger co-designed by André Planiol and Polish engineer Joseph Szydlowski. The Szydlowski-Planiol device was larger, but much more efficient than the mediocre Hispano-Suiza models. When used with 100 octane fuel, the supercharger boosted to the -21's 7:1, increasing power to 900 hp (670 kW). Combined with the Ratier constant-speed propeller, this allowed the D.520 to perform as well as contemporary designs from Germany and England.

Another improvement in supercharging led to the Hispano-Suiza 12Y-49, whose performance improved from 850 hp (630 kW) at sea level to 920 hp (690 kW) at just over 10,000 ft (3,000 m). This improvement in power with altitude was a common feature of most engines of the era, the result of the supercharger "robbing" power at low altitudes while not boosting the power due to the possibility of detonation.

The final major version was the 1,085 hp (809 kW) Hispano-Suiza 12Y-51, which had just started into production at the time of the Armistice with Germany. The -51 was the first version that came close to the performance limits of the engine, although the single-stage supercharging meant that it was unable to compete with designs from England and Germany above 15,000 ft (5,000 m).

Foreign derivatives

In the early 1930s the Czechoslovakian Republic gained rights to build a license version of the HS-12Y. This was produced by Avia (Škoda) at Prag - Čakovice. The engine was intended to become the standard powerplant of all Czech military aircraft. Both the HS-12Ycrs and HS-12Ydrs were built in quantity and were more commonly known by these names rather than any Czech designation. Aircraft powered by these engines included the Czech Avia B-34, Avia B-534, Avia B-71, Avia B-35, Avia B-135 and the Yugoslav Rogožarski IK-3 .

Switzerland license built and assembled several different versions of the basic 12Ycrs for use in several aircraft: the reconnaissance biplane the EKW C-35, the multipurpose EKW C-36, the Swiss assembled D-3800 copy of the French M.S. 406 fighter and Swiss built versions of the French M.S.412 fighter called the D.3801. Saurer developed the engine further after the Fall of France into the YS-2 and YS-3 engines. These were used in more powerful follow-on versions of the same basic French fighter design, the M.S.450 called the D.3802 and then the final version called the D.3803.

In the mid-1930s, Russian engineer Vladimir Klimov was sent to France to obtain a license for local production of the 12Y. A series of design changes were added to cope with cold weather operation, and the engine entered production in 1935 as the Klimov M-100 with about 750 hp (560 kW).[1] However a series of continual upgrades increased the allowable RPM from the 12Y's fairly low 2,400 to 2,700, thereby increasing power to 1,100 hp (820 kW). The resulting design, the Klimov M-105 (VK-105) became one of the major Soviet engine designs during the war, powering all Yakovlev fighters.

Variants

Tabulated data from Lage 2004[2]

Type 73 Hispano 12Y engines. V-12, bore: 150 mm, stroke: 170 mm, capacity: 36.0 litres. Type 77 with 20 mm Hispano-Suiza HS.404 cannon between cylinder banks, firing through propeller shaft.
Model Year Compression Power (hp) @ r.p.m. T-O power (hp) Output reduction Supercharger optimum altitude (m) Weight (kg) Cannon (y/n) Comments
12Ybr 650 hp 1932 6.4 785 2,200 785 1.5 0 415 n Rated power (650 hp) less than nominal 785 hp
12Ybrs 1934 5.8 860 2,400 835 1.0625 4,000 470 y
12Ycrs 1934 5.8 860 2,400 835 0.67:1 4,000 470 y
12Ygrs 650 hp 1932 5.8 850 2,400 800 1.5 4,000 430 n Rated power (650 hp) less than nominal 850 hp
12Ydr 1934 6.4 800 2,200 800 1.5 0 440 n As 12Ybr, variable-pitch propeller, left turning. For this and all later entries in both tables, Rated power = Nominal power = Power
12Ydrs 1934 5.8 860 2,400 835 1.5 4,000 470 n As 12Ybrs, variable-pitch propeller, left turning
12Ydrs1 1934 5.8 880 2,400 890 1.5 2,400 470 n Variable-pitch propeller, left turning
12Ydrs2 1934 5.8 930 2,400 992 1.5 900 470 n Variable-pitch propeller, left turning
12Yfrs 1934 5.8 860 2,400 835 1.5 4,000 470 n As 12Ydrs, right turning
12Yfrs1 1934 5.8 880 2,400 890 1.5 2,400 470 n As 12Ydrs1, right turning
12Yfrs2 1934 5.8 930 2,400 992 1.5 900 470 n As 12Ydrs, right turning
12Y-21 1935 7.0 910 2,400 880 1.5 3,600 470 n
12Y-25 1935 5.8 860 2,400 943 1.5 3,600 n As 12Ydrs, variable ignition timing
12Y-26 1935 5.8 900 2,400 950 1.8 850 483 opposite rotation to -27
12Y-27 1935 5.8 900 2,400 950 1.8 850 483 opposite rotation to -26
12Y-28 7.2 920 2,400 910 0.67:1 3,600 475 y LH rotation
12Y-29 7.2 920 2,400 910 0.67:1 3,600 475 y Identical to -28 but RH rotation
12Y-30 1936 5.8 860 2,400 830 0.67:1 3,250 468 y Redesigned connecting rods,LH rotation
12Y-31 1936 5.8 860 2,400 830 0.67:1 3,250 468 y Identical to -30 but RH rotation
12Y-32 1936 5.8 960 2,400 955 0.67:1 2,300 468 y Redesigned connecting rods,LH rotation
12Y-33 1936 5.8 960 2,400 955 0.67:1 2,300 468 y Identical to -32 but RH rotation
12Y-36 1936 7.0 960 2,400 1,050 0.55:1 1,250 483 y LH rotation
12Y-37 1936 7.0 960 2,400 1,050 0.55:1 1,250 483 y Identical to -36 but RH rotation
12Y-38 1936 7.0 1000 2,400 1.5 3,400 n LH rotation
12Y-39 1936 7.0 1000 2,400 1.5 3,400 n Identical to -38 but RH rotation
12Y-41 1936 7.0 920 2,400 0.67:1 3,600 483 y
12Y-45 7.0 920 2,400 935 0.67:1 4,200 y Szydlowsky-Planiol (SP) supercharger
12Y-47 1936 5.8 860 2,400 830 0.67:1 3,250 468 y
12Y 49 7.0 910 2,400 910 0.67:1 5,250 y (SP) supercharger, variable ignition timing
12Y-50 1939 7.0 1,000 2,500 1,100 0.67:1 3,260 492 y (SP) supercharger LH rotation
12Y-51 1939 7.0 1,000 2,500 1,100 0.67:1 3,260 492 y Identical to -50 but RH rotation
Model Year Compression Power (hp) @ r.p.m. T-O power (hp) Output reduction Supercharger optimum altitude (m) Weight (kg) Cannon (y/n) Comments

Related

Hispano-Suiza 12Z

Licence built variants

Czechoslovakia
Avia HS 12Y
USSR[3][4]
Klimov VK-100
Klimov VK-103 746 kW (1,000 hp)
Klimov VK-103A 820 kW (1,100 hp) at 2,000 m (6,600 ft)
Klimov VK-104
Klimov VK-105P 820 kW (1,100 hp) at take-off
Klimov VK-106 1,007 kW (1,350 hp) at take-off
Klimov VK-107 1,342 kW (1,800 hp) at take-off
Switzerland
Hispano-Suiza HS-77
12 Ycrs

Applications

Klimov powered

Specifications (12Y-50)

Data from Aircraft Engines of the World 1945 [5]

General characteristics

  • Type: Twelve-cylinder supercharged liquid-cooled 60° V12 engine
  • Bore: 150 mm (5.9 in)
  • Stroke: 170 mm (6.69 in)
  • Displacement: 36 L (2,197 cu in)
  • Length: 2,137 mm (84.3 in)
  • Width: 764 mm (29.9 in)
  • Height: 945 mm (37 in)
  • Dry weight: 492 kg (1,085 lb)

Components

Performance

See also

Comparable engines

Related lists

References

 
Wikimedia Commons has media related to Hispano-Suiza 12Y.

Notes

  1. ^ Kotelnikov 2005, p. 136.
  2. ^ Lage, 2004, pp.486–7
  3. ^ Gunston 1989
  4. ^ Lage, 2004, pp.258-260
  5. ^ Wilkinson 1945 p. 239.

Bibliography

  • Danel, Raymond and Jean Cuny. Docavia n°4: le Dewoitine D.520 (in French). Paris: Editions Larivière, 1966.
  • Kotelnikov, Vladimir. Russian Piston Aero Engines. Marlborough, Wiltshire. The Crowood Press Ltd. 2005. ISBN 1-86126-702-9.
  • Hispano-Suiza 12Y-47 Retrieved: 1 October 2010.
  • Wilkinson, Paul H. Aircraft Engines of the World 1945. Paul H. Wilkinson. New York. 1945 OCLC 766030348
  • Gunston, Bill. World Encyclopedia of Aero engines fully revised second edition. Patrick Stephens Limited. Wellingborough. 1989. ISBN 1-85260-163-9
  • Lage, Manuel (2004). Hispano Suiza in Aeronautics. Warrendale, USA: SAE International. pp. 486–487. ISBN 0-7680-0997-9.

January 05, 2023
hispano, suiza, aircraft, engine, produced, hispano, suiza, french, force, before, second, world, became, primary, french, class, engine, used, number, famous, aircraft, including, morane, saulnier, dewoitine, 12ytype, piston, aero, enginenational, origin, fra. The Hispano Suiza 12Y was an aircraft engine produced by Hispano Suiza for the French Air Force before the Second World War The 12Y became the primary French 1 000 hp 750 kW class engine and was used in a number of famous aircraft including the Morane Saulnier M S 406 and Dewoitine D 520 12YType V 12 piston aero engineNational origin FranceManufacturer Hispano SuizaFirst run 1932Major applications Dewoitine D 520 Ikarus IK 2 Morane Saulnier MS 406Developed from Hispano Suiza 12XDeveloped into Hispano Suiza 12ZIts design was based on the earlier and somewhat smaller 12X The 12X did not see widespread use before the 12Y replaced it and became one of the most powerful French designs on the eve of the war The 12Z was being designed but this was ended by the fall of France and the German occupation The 12Y was produced under Hispano Suiza licence in the Soviet Union as the Klimov M 100 This design led to the highly successful Klimov VK 105 series that powered the Yakovlev and Lavochkin fighters as well as the Petlyakov Pe 2 bomber Licensed production of the early models was also undertaken in Czechoslovakia as the Avia HS 12Ydrs and in Switzerland as the HS 77 Contents 1 Design and development 1 1 Early development 1 2 Late variants 1 3 Foreign derivatives 2 Variants 2 1 Related 2 2 Licence built variants 3 Applications 3 1 Klimov powered 4 Specifications 12Y 50 4 1 General characteristics 4 2 Components 4 3 Performance 5 See also 6 References 6 1 Notes 6 2 BibliographyDesign and development EditEarly development Edit The 12Y was a fairly traditional in construction a 36 litre water cooled V 12 with the two cast aluminium cylinder banks set at 60 degrees to each other The cylinder heads were not removable instead both cylinder banks could be quickly removed from the crankcase section of the engine This made it somewhat famous for being leak proof a design feature that was considered by other designers and almost became a part of the Rolls Royce Merlin The major design change from the earlier 12X was to use a master articulated connecting rod system instead of the fork and blade type A single overhead camshaft SOHC drove the valves which were filled with liquid sodium for cooling Only a single intake and exhaust valve were used unlike most designs of the era which had moved to three or four valves per cylinder A single stage single speed supercharger was standard although the art of designing a useful intake was not as well developed as in other countries and high altitude performance was always lacking The first 12Y test articles were constructed in 1932 and almost immediately the entire French aviation industry began designing aeroplanes based on it At the time the engine developed only 760 hp 570 kW but it was clear it had potential to the 1 000 hp 750 kW class An early modification led to the Hispano Suiza 12Ycrs which used a hollow propeller shaft to allow a 20 mm cannon to fire through the propeller spinner a combination known as a moteur canon All later versions shared this feature The 12Ydrs was the next major series with a basic rating of 836 hp 623 kW at sea level with a compression ratio of 5 8 1 The Armee de l Air changed their nomenclature so the next version was the Hispano Suiza 12Y 21 which increased the compression ratio to 7 1 when running on 100 octane gasoline This boosted power to 867 hp 647 kW In 1936 the connecting rod design was changed slightly to create the 12Y 31 but the lower 5 8 1 compression ratio was retained and the power was increased only slightly over the drs model to 850 hp 630 kW Nevertheless this became one of the most used engine designs of the pre war era used in almost all French fighter designs and prototypes 12 Ybrs showing valve gear Late variants Edit A real effort to improve the performance of the engine in 1938 resulted in the Hispano Suiza 12Y 45 which used the S 39 H3 supercharger co designed by Andre Planiol and Polish engineer Joseph Szydlowski The Szydlowski Planiol device was larger but much more efficient than the mediocre Hispano Suiza models When used with 100 octane fuel the supercharger boosted to the 21 s 7 1 increasing power to 900 hp 670 kW Combined with the Ratier constant speed propeller this allowed the D 520 to perform as well as contemporary designs from Germany and England Another improvement in supercharging led to the Hispano Suiza 12Y 49 whose performance improved from 850 hp 630 kW at sea level to 920 hp 690 kW at just over 10 000 ft 3 000 m This improvement in power with altitude was a common feature of most engines of the era the result of the supercharger robbing power at low altitudes while not boosting the power due to the possibility of detonation The final major version was the 1 085 hp 809 kW Hispano Suiza 12Y 51 which had just started into production at the time of the Armistice with Germany The 51 was the first version that came close to the performance limits of the engine although the single stage supercharging meant that it was unable to compete with designs from England and Germany above 15 000 ft 5 000 m Foreign derivatives Edit In the early 1930s the Czechoslovakian Republic gained rights to build a license version of the HS 12Y This was produced by Avia Skoda at Prag Cakovice The engine was intended to become the standard powerplant of all Czech military aircraft Both the HS 12Ycrs and HS 12Ydrs were built in quantity and were more commonly known by these names rather than any Czech designation Aircraft powered by these engines included the Czech Avia B 34 Avia B 534 Avia B 71 Avia B 35 Avia B 135 and the Yugoslav Rogozarski IK 3 Switzerland license built and assembled several different versions of the basic 12Ycrs for use in several aircraft the reconnaissance biplane the EKW C 35 the multipurpose EKW C 36 the Swiss assembled D 3800 copy of the French M S 406 fighter and Swiss built versions of the French M S 412 fighter called the D 3801 Saurer developed the engine further after the Fall of France into the YS 2 and YS 3 engines These were used in more powerful follow on versions of the same basic French fighter design the M S 450 called the D 3802 and then the final version called the D 3803 In the mid 1930s Russian engineer Vladimir Klimov was sent to France to obtain a license for local production of the 12Y A series of design changes were added to cope with cold weather operation and the engine entered production in 1935 as the Klimov M 100 with about 750 hp 560 kW 1 However a series of continual upgrades increased the allowable RPM from the 12Y s fairly low 2 400 to 2 700 thereby increasing power to 1 100 hp 820 kW The resulting design the Klimov M 105 VK 105 became one of the major Soviet engine designs during the war powering all Yakovlev fighters Variants EditTabulated data from Lage 2004 2 Type 73 Hispano 12Y engines V 12 bore 150 mm stroke 170 mm capacity 36 0 litres Type 77 with 20 mm Hispano Suiza HS 404 cannon between cylinder banks firing through propeller shaft Model Year Compression Power hp r p m T O power hp Output reduction Supercharger optimum altitude m Weight kg Cannon y n Comments12Ybr 650 hp 1932 6 4 785 2 200 785 1 5 0 415 n Rated power 650 hp less than nominal 785 hp12Ybrs 1934 5 8 860 2 400 835 1 0625 4 000 470 y12Ycrs 1934 5 8 860 2 400 835 0 67 1 4 000 470 y12Ygrs 650 hp 1932 5 8 850 2 400 800 1 5 4 000 430 n Rated power 650 hp less than nominal 850 hp12Ydr 1934 6 4 800 2 200 800 1 5 0 440 n As 12Ybr variable pitch propeller left turning For this and all later entries in both tables Rated power Nominal power Power12Ydrs 1934 5 8 860 2 400 835 1 5 4 000 470 n As 12Ybrs variable pitch propeller left turning12Ydrs1 1934 5 8 880 2 400 890 1 5 2 400 470 n Variable pitch propeller left turning12Ydrs2 1934 5 8 930 2 400 992 1 5 900 470 n Variable pitch propeller left turning12Yfrs 1934 5 8 860 2 400 835 1 5 4 000 470 n As 12Ydrs right turning12Yfrs1 1934 5 8 880 2 400 890 1 5 2 400 470 n As 12Ydrs1 right turning12Yfrs2 1934 5 8 930 2 400 992 1 5 900 470 n As 12Ydrs right turning12Y 21 1935 7 0 910 2 400 880 1 5 3 600 470 n12Y 25 1935 5 8 860 2 400 943 1 5 3 600 n As 12Ydrs variable ignition timing12Y 26 1935 5 8 900 2 400 950 1 8 850 483 opposite rotation to 2712Y 27 1935 5 8 900 2 400 950 1 8 850 483 opposite rotation to 2612Y 28 7 2 920 2 400 910 0 67 1 3 600 475 y LH rotation12Y 29 7 2 920 2 400 910 0 67 1 3 600 475 y Identical to 28 but RH rotation12Y 30 1936 5 8 860 2 400 830 0 67 1 3 250 468 y Redesigned connecting rods LH rotation12Y 31 1936 5 8 860 2 400 830 0 67 1 3 250 468 y Identical to 30 but RH rotation12Y 32 1936 5 8 960 2 400 955 0 67 1 2 300 468 y Redesigned connecting rods LH rotation12Y 33 1936 5 8 960 2 400 955 0 67 1 2 300 468 y Identical to 32 but RH rotation12Y 36 1936 7 0 960 2 400 1 050 0 55 1 1 250 483 y LH rotation12Y 37 1936 7 0 960 2 400 1 050 0 55 1 1 250 483 y Identical to 36 but RH rotation12Y 38 1936 7 0 1000 2 400 1 5 3 400 n LH rotation12Y 39 1936 7 0 1000 2 400 1 5 3 400 n Identical to 38 but RH rotation12Y 41 1936 7 0 920 2 400 0 67 1 3 600 483 y12Y 45 7 0 920 2 400 935 0 67 1 4 200 y Szydlowsky Planiol SP supercharger12Y 47 1936 5 8 860 2 400 830 0 67 1 3 250 468 y12Y 49 7 0 910 2 400 910 0 67 1 5 250 y SP supercharger variable ignition timing12Y 50 1939 7 0 1 000 2 500 1 100 0 67 1 3 260 492 y SP supercharger LH rotation12Y 51 1939 7 0 1 000 2 500 1 100 0 67 1 3 260 492 y Identical to 50 but RH rotationModel Year Compression Power hp r p m T O power hp Output reduction Supercharger optimum altitude m Weight kg Cannon y n CommentsRelated Edit Hispano Suiza 12ZLicence built variants Edit Czechoslovakia Avia HS 12YUSSR 3 4 Klimov VK 100 Klimov VK 103 746 kW 1 000 hp Klimov VK 103A 820 kW 1 100 hp at 2 000 m 6 600 ft Klimov VK 104 Klimov VK 105P 820 kW 1 100 hp at take off Klimov VK 106 1 007 kW 1 350 hp at take off Klimov VK 107 1 342 kW 1 800 hp at take offSwitzerland Hispano Suiza HS 77 12 YcrsApplications EditAEKKEA RAAB R 29 ANF Les Mureaux 110 119 series ANF Les Mureaux 113 Aero A 104 Amiot 110 S Amiot 143 Amiot 354 Amiot 370 Arsenal VB 10 Arsenal VG 33 Arsenal Delanne 10 Avia 156 Avia B 135 Avia B 34 Avia B 534 Avia B 35 Bernard 260 Bernard 80 GR Bernard 82 Bloch MB 170 Bloch MB 177 Bloch MB 200 Bloch MB 210 Bleriot SPAD S 510 Breguet 19 Breguet 270 Breguet 410 Breguet 482 Breguet 521 Bizerte CAMS 110 CAMS 80 Caproni Ca 335 D 3800 01 02 03 Dewoitine D 500 Dewoitine D 510 Dewoitine D 513 Dewoitine D 520 Dewoitine D 770 Dornier Do 22 EKW C 35 EKW C 36 Fairey Fantome Fairey Fox Farman F 220 Farman NC 223 3 Farman NC 223 4 Fauvel AV 29 Ikarus IK 2 Latham 47 Latecoere 298 Latecoere 300 Latecoere 380 Latecoere 521 Liore et Olivier LeO 25 Liore et Olivier LeO H 47 Loire 130 Loire Nieuport 161 Loire Nieuport LN 401 Morane Saulnier M S 406 Morane Saulnier M S 475 Morane Saulnier Vanneau Nieuport Delage NiD 120 Potez 230 Potez 39 Potez CAMS 141 Potez CAMS 160 Potez CAMS 161 Renard R 36 Renard R 31 Rogozarski IK 3 Romano R 90 SAB AB 80 SNCAC NC 130 SNCAC NC 150 SNCAC NC 4 10 SNCAO 200 Wibault 360 Wibault 366 Klimov powered Edit Arkhangelsky Ar 2 Bartini DAR Beriev MBR 7 Bolkhovitinov S Lavochkin Gorbunov Goudkov LaGG 1 Lavochkin Gorbunov Goudkov LaGG 3 Morko Morane Petlyakov Pe 2 Petlyakov Pe 3 Petlyakov Pe 8 Polikarpov I 17 Tupolev SB Yakovlev Yak 1 Yakovlev Yak 2 Yakovlev Yak 3 Yakovlev Yak 4 Yakovlev Yak 7 Yakovlev Yak 9 Yermolayev Yer 2Specifications 12Y 50 EditData from Aircraft Engines of the World 1945 5 General characteristics Type Twelve cylinder supercharged liquid cooled 60 V12 engine Bore 150 mm 5 9 in Stroke 170 mm 6 69 in Displacement 36 L 2 197 cu in Length 2 137 mm 84 3 in Width 764 mm 29 9 in Height 945 mm 37 in Dry weight 492 kg 1 085 lb Components Valvetrain One intake and one sodium filled exhaust valve per cylinder actuated via a single overhead camshaft per bank Supercharger Gear driven single speed centrifugal type supercharger 10 1 gear ratio Fuel system Six Solex 56 S V C carburetors Fuel type 87 octane rating gasoline Oil system Pressure feed dry sump Cooling system Pressurised liquid cooled Reduction gear Spur 0 67 1Performance Power output 820 kW 1 100 hp at 2 400 rpm for takeoff Specific power 22 8 kW L 0 38 hp in Compression ratio 7 1 Specific fuel consumption 0 5 lb hp h Oil consumption 0 018 lb hp h Power to weight ratio 1 66 kW kg 1 01 hp lb See also EditComparable engines Allison V 1710 Daimler Benz DB 601 Mikulin AM 35 Rolls Royce MerlinRelated lists List of aircraft enginesReferences Edit Wikimedia Commons has media related to Hispano Suiza 12Y Notes Edit Kotelnikov 2005 p 136 Lage 2004 pp 486 7 Gunston 1989 Lage 2004 pp 258 260 Wilkinson 1945 p 239 Bibliography Edit Danel Raymond and Jean Cuny Docavia n 4 le Dewoitine D 520 in French Paris Editions Lariviere 1966 Kotelnikov Vladimir Russian Piston Aero Engines Marlborough Wiltshire The Crowood Press Ltd 2005 ISBN 1 86126 702 9 Hispano Suiza 12Y 47 Retrieved 1 October 2010 Wilkinson Paul H Aircraft Engines of the World 1945 Paul H Wilkinson New York 1945 OCLC 766030348 Gunston Bill World Encyclopedia of Aero engines fully revised second edition Patrick Stephens Limited Wellingborough 1989 ISBN 1 85260 163 9 Lage Manuel 2004 Hispano Suiza in Aeronautics Warrendale USA SAE International pp 486 487 ISBN 0 7680 0997 9 Retrieved from https en wikipedia org w index php title Hispano Suiza 12Y amp oldid 1130660428, wikipedia, wiki, book, books, library,

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