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Hispano-Suiza 12N

August 29, 2023

The Hispano-Suiza 12N was one of two new V-12 engine designs first run in 1928 and was manufactured by Hispano-Suiza's French subsidiary for the Armee d'l'Air. It produced about 485 kW (650 hp), was the first to use gas nitride hardening and introduced wet cylinder liners into Hispano-Suiza's aircraft engine range. It powered the first non-stop flight from Europe to the United States.

12N
Type V-12
National origin France
Manufacturer Société Francaise Hispano-Suiza
Designer Marc Birkigt
First run 1928
Variants Hispano-Suiza 18R

Design and development Edit

Up to 1927, Hispano-Suiza's many engine types, of various layouts and cylinder numbers, were all recognisable developments of the World War I V-8 Hispano-Suiza 8. 1927-8 saw the introduction of four completely new engines, two V-12s and two with six cylinders inline. The Hispano-Suiza 12N, known by the manufacturers as the Type 61, was the larger of the V-12s, with a displacement of 36 L (2,200 cu in), the other being the 27 L (1,600 cu in) 12M. Apart from capacity and power, these two engines had much in common. The 12M first ran in 1927 and the 12N a year later.[1]

Both 12M and 12N were 60° V engines with carburettors, inlets and exhausts on the outer faces. There were three carburettors per bank, each charging a pair of cylinders. Much of the new technology was in the cylinder design: these types introduced wet liners, an Hispano automobile engine innovation which brought the cooling water into direct contact with the steel cylinder barrel rather than by screwing it into an aluminium water jacket. This improved cooling, simplified assembly and allowed larger cylinder bores without increasing their separation. The cylinder barrels were open at top and bottom and threaded for screwing into the block only near the top, with valve seats ground into the aluminium cylinder head. The lower end of the barrel extended into the crankcase, simplifying both manufacture and assembly. Block and crankcase were bolted together.[2]

The 12M and 12N engines were the first to use the gas nitriding surface hardening process on the cylinder walls, which reduced both wear and oil consumption. They also used a novel, complicated but effective method of main bearing cooling, enhancing the local lubricant flow without requiring high overall oil pump speeds.[1]

Both types were designed so that Epicyclic gearing could be added or removed quickly; some earlier Hispano-Suiza engines offered gearing but as a permanent fixture on a specific sub-type. The gears added 45 kg (99 lb) to the weight. In 1935 the 12Ner variant was fitted with an in-flight- electrically operated variable pitch propeller.[1]

The 12N series was developed into the 12Y (Type 73) supercharged engine, first run in 1932.[3]

Operational history Edit

A Hispano-Suiza 12Nb powered the Breguet XIX Point d'Interrogation on the first non-stop flight from Paris to New York in September 1930. This was the first east to west flight between Europe and the United States, rather than to the North American continent.[1]

In the early 1930s, 12N engines powered the flying boats operating the French Atlantic and African routes.[1]

The Swiss government, in the form of the KTA (Kriegstechninischen Abteilung or War Technical Department) purchased construction licences for the 12Nb and in 1932 eighty units were built at the Saurer lorry factory.[1]

Variants Edit

Data from Hispano Suiza in Aeronautics.[1]

12Nb/650
Compression ratio 6.2, maximum power 560 kW (750 hp) at 2,100 rpm.
12Nbr/650
Compression ratio 6.2, maximum power 550 kW (740 hp) at 2,100 rpm. Gearing ratio of 2:1 or 1.61:1.
12Ns
Compression ratio 7, nominal power 670 kW (900 hp) at 2,200 rpm. For Schneider Cup 1928.
12Nsr
Compression ratio 10, nominal power 745 kW (999 hp) at 2,400 rpm. For Schneider Cup 1931. Farman compressor.
12Nc
Compression ratio 6.2, nominal power 533 kW (715 hp) at 2,000 rpm. For Ford 14A Trimotor.
12Ncr
12Ndr
Electrically controlled pitch propeller, anti-clockwise turning (1935).
12Ner
As 12Ndr, modified with articulated connecting rods.
12Nfr
As Ndr, clockwise turning.
12Ngr
As Ner, clockwise turning.

Applications Edit

Specifications (12Nbr/650) Edit

Data from Hispano-Suiza in Aeronautics[1]

General characteristics

Components

Performance

See also Edit

Comparable engines

Related lists

References Edit

  1. ^ a b c d e f g h i Lage, Manual (2004). Hispano Suiza in Aeronautics. Warrendale, USA: SAE International. pp. 135–143, 484. ISBN 0-7680-0997-9.
  2. ^ Lage 2004, p. 147
  3. ^ Lage 2004, pp. 177–81
  4. ^ a b c Liron, J.L. (1990). Les avions Bernard. Paris: Éditions Larivère. pp. 224–5.
  5. ^ Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. New York: Portland House. p. 192. ISBN 0-517-69186-8.
  6. ^ "Breguet Bre.330". Retrieved 19 October 2012.
  7. ^ Taylor 1989, p. 227
  8. ^ Taylor 1989, p. 269
  9. ^ Liron, J.L. (1984). Les avions Farman. Paris: Éditions Larivère. pp. 228–231.
  10. ^ Cuny, Jean (1992). Latécoère Les avions et hydravions. Paris: Editions Larivière. pp. 84, 87. ISBN 2-84890067-9.
  11. ^ Cuny 1992, p. 199
  12. ^ Cuny 1992, pp. 132, 137
  13. ^ Cuny 1992, p. 124
  14. ^ Cuny 1992, p. 195
  15. ^ Cuny 1992, p. 247
  16. ^ Cuny 1992, p. 153
  17. ^ Taylor 1989, p. 573
  18. ^ a b Taylor 1989, p. 575
  19. ^ Taylor 1989, p. 580
  20. ^ James, Derek (1991). Westland Aircraft since 1915. London: Putnam Publishing. p. 153. ISBN 0-85177-847-X.

August 29, 2023
hispano, suiza, engine, designs, first, 1928, manufactured, hispano, suiza, french, subsidiary, armee, produced, about, first, nitride, hardening, introduced, cylinder, liners, into, hispano, suiza, aircraft, engine, range, powered, first, stop, flight, from, . The Hispano Suiza 12N was one of two new V 12 engine designs first run in 1928 and was manufactured by Hispano Suiza s French subsidiary for the Armee d l Air It produced about 485 kW 650 hp was the first to use gas nitride hardening and introduced wet cylinder liners into Hispano Suiza s aircraft engine range It powered the first non stop flight from Europe to the United States 12NType V 12National origin FranceManufacturer Societe Francaise Hispano SuizaDesigner Marc BirkigtFirst run 1928Variants Hispano Suiza 18R Contents 1 Design and development 2 Operational history 3 Variants 4 Applications 5 Specifications 12Nbr 650 5 1 General characteristics 5 2 Components 5 3 Performance 6 See also 7 ReferencesDesign and development EditUp to 1927 Hispano Suiza s many engine types of various layouts and cylinder numbers were all recognisable developments of the World War I V 8 Hispano Suiza 8 1927 8 saw the introduction of four completely new engines two V 12s and two with six cylinders inline The Hispano Suiza 12N known by the manufacturers as the Type 61 was the larger of the V 12s with a displacement of 36 L 2 200 cu in the other being the 27 L 1 600 cu in 12M Apart from capacity and power these two engines had much in common The 12M first ran in 1927 and the 12N a year later 1 Both 12M and 12N were 60 V engines with carburettors inlets and exhausts on the outer faces There were three carburettors per bank each charging a pair of cylinders Much of the new technology was in the cylinder design these types introduced wet liners an Hispano automobile engine innovation which brought the cooling water into direct contact with the steel cylinder barrel rather than by screwing it into an aluminium water jacket This improved cooling simplified assembly and allowed larger cylinder bores without increasing their separation The cylinder barrels were open at top and bottom and threaded for screwing into the block only near the top with valve seats ground into the aluminium cylinder head The lower end of the barrel extended into the crankcase simplifying both manufacture and assembly Block and crankcase were bolted together 2 The 12M and 12N engines were the first to use the gas nitriding surface hardening process on the cylinder walls which reduced both wear and oil consumption They also used a novel complicated but effective method of main bearing cooling enhancing the local lubricant flow without requiring high overall oil pump speeds 1 Both types were designed so that Epicyclic gearing could be added or removed quickly some earlier Hispano Suiza engines offered gearing but as a permanent fixture on a specific sub type The gears added 45 kg 99 lb to the weight In 1935 the 12Ner variant was fitted with an in flight electrically operated variable pitch propeller 1 The 12N series was developed into the 12Y Type 73 supercharged engine first run in 1932 3 Operational history EditA Hispano Suiza 12Nb powered the Breguet XIX Point d Interrogation on the first non stop flight from Paris to New York in September 1930 This was the first east to west flight between Europe and the United States rather than to the North American continent 1 In the early 1930s 12N engines powered the flying boats operating the French Atlantic and African routes 1 The Swiss government in the form of the KTA Kriegstechninischen Abteilung or War Technical Department purchased construction licences for the 12Nb and in 1932 eighty units were built at the Saurer lorry factory 1 Variants EditData from Hispano Suiza in Aeronautics 1 12Nb 650 Compression ratio 6 2 maximum power 560 kW 750 hp at 2 100 rpm 12Nbr 650 Compression ratio 6 2 maximum power 550 kW 740 hp at 2 100 rpm Gearing ratio of 2 1 or 1 61 1 12Ns Compression ratio 7 nominal power 670 kW 900 hp at 2 200 rpm For Schneider Cup 1928 12Nsr Compression ratio 10 nominal power 745 kW 999 hp at 2 400 rpm For Schneider Cup 1931 Farman compressor 12Nc Compression ratio 6 2 nominal power 533 kW 715 hp at 2 000 rpm For Ford 14A Trimotor 12Ncr 12Ndr Electrically controlled pitch propeller anti clockwise turning 1935 12Ner As 12Ndr modified with articulated connecting rods 12Nfr As Ndr clockwise turning 12Ngr As Ner clockwise turning Applications EditAmiot 130 Amiot 140 Avia B 34 Bernard H V 41 4 Bernard H V 42 4 Bernard 80 amp 81 4 Bleriot 5190 5 Breguet XIX Point d Interrogation 1 Breguet 330 6 CAMS 58 3 7 Couzinet 70 8 Farman F 302 9 Latecoere 28 10 Latecoere 290 11 Latecoere 300 and 301 12 Latecoere 381 13 Latecoere 440 14 Latecoere 490 15 Latecoere 521 16 Letov S 616 17 Levasseur PL 14 18 Levasseur PL 15 18 Liore et Olivier LeO 25 8 19 Westland Wapiti IV uncertain if completed with 14N 20 Specifications 12Nbr 650 EditData from Hispano Suiza in Aeronautics 1 General characteristics Type V 12 water cooled Bore 150 mm 5 90 in Stroke 170 mm 6 69 in Displacement 36 0 L 2 197 cu in Dry weight 520 kg 1146 lb Components Reduction gear 2 1Performance Power output normal 550 kW 740 hp at 2 000 rpm Compression ratio 6 2See also EditComparable engines Rolls Royce BuzzardRelated lists List of aircraft enginesReferences Edit a b c d e f g h i Lage Manual 2004 Hispano Suiza in Aeronautics Warrendale USA SAE International pp 135 143 484 ISBN 0 7680 0997 9 Lage 2004 p 147 Lage 2004 pp 177 81 a b c Liron J L 1990 Les avions Bernard Paris Editions Larivere pp 224 5 Taylor Michael J H 1989 Jane s Encyclopedia of Aviation New York Portland House p 192 ISBN 0 517 69186 8 Breguet Bre 330 Retrieved 19 October 2012 Taylor 1989 p 227 Taylor 1989 p 269 Liron J L 1984 Les avions Farman Paris Editions Larivere pp 228 231 Cuny Jean 1992 Latecoere Les avions et hydravions Paris Editions Lariviere pp 84 87 ISBN 2 84890067 9 Cuny 1992 p 199 Cuny 1992 pp 132 137 Cuny 1992 p 124 Cuny 1992 p 195 Cuny 1992 p 247 Cuny 1992 p 153 Taylor 1989 p 573 a b Taylor 1989 p 575 Taylor 1989 p 580 James Derek 1991 Westland Aircraft since 1915 London Putnam Publishing p 153 ISBN 0 85177 847 X Retrieved from https en 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