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Hispano-Suiza piston aero-engines
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Hispano-Suiza piston aero-engines were predominantly piston engines produced by Hispano-Suiza in France, Spain, and under licence in the United Kingdom, the United States and Russia from the First World War through to the 1950s. Development of these engines started with the very successful V-8 engines which introduced many new features which ensured the success of the Hispano-Suiza line.
Designations
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Letter system
The Service technique de l'aéronautique (STAé) used a common designation system for the vast majority of engines produced in France, which signified the major attributes of the particular engines:-
- Manufacturer - In this case Hispano-Suiza
- 12 - the number of cylinders in any configuration (V, straight, W, horizontally opposed, radial, etc.).
- Y - the family letter in capitals (note: in at least two instances the family designator consisted of two letters in capitals e.g. 14AA and 14AB), advancing alphabetically. (note:Hispano-Suiza avoided W to avoid confusion with W / Broad-arrow engines)
- a – sub variant indicator, (which could also indicate the rotation of the engine, where otherwise identical engines with opposite hand rotation were built, e.g. 12Ndr anti-clockwise and 12Nfr clockwise).
- r – attribute indicators, denoting various attributes that the engine might have, (r = reduction gearing, i = fuel injection, s = supercharged, etc.)
- 1 - sub-sub variants were denoted by using a number after the letters, (e.g. 12Xhrs and 12Xhrs1), usually indicating differences in ancillary equipment.
Thus the 12Xgrs was of the X family, with reduction gearing and supercharger, whereas the 12Xhrs was identical but rotated in the opposite direction.
Number system
The STAé introduced a numbered attribute indicator from the late 1930s, thus;
12Y-26, 12Y-27 – left and right rotation versions of the same engine.
Basic versions of each engine had even numbers and opposite rotation version were odd numbered.
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List of H-S piston aero-engines
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Data from:Moteurs d'Aviation Hispano-Suiza[1]
Livre d'Or de la Société Française Hispano-Suiza[2]
Hispano-Suiza:Revue et Bulletin Technique de la Société Française Hispano-Suiza Jun 28[3]
Hispano-Suiza:Revue et Bulletin Technique de la Société Française Hispano-Suiza Jan 28[4]
Hispano-Suiza:Revue et Bulletin Technique de la Société Française Hispano-Suiza Nov 29[5]
Hispano-Suiza:Revue et Bulletin Technique de la Société Française Hispano-Suiza Dec 30[6]
Hispano-Suiza:Revue et Bulletin Technique de la Société Française Hispano-Suiza Jun 30[7]
Hispano-Suiza:Revue et Bulletin Technique de la Société Française Hispano-Suiza Nov 31[8]
Hispano-Suiza:Revue et Bulletin Technique de la Société Française Hispano-Suiza Apr 32[9]
Hispano-Suiza:Revue et Bulletin Technique de la Société Française Hispano-Suiza Oct 32[10]
Hispano-Suiza:Revue et Bulletin Technique de la Société Française Hispano-Suiza Jan-Jun 35[11]
Le moteur-canon V8 Hispano-Suiza[12]
HISPANO-SUIZA:LES MOTEURS DE TOUS LES RECORDS[13]
Aviafrance [14]
- 6M
- 6Mb
- 6Mbr
- 6P
- 6Pa
- 8A
- 8Aa
- 8Ab
- 8B
- 8Ba
- 8Bb
- 8Bc
- 8Bd
- 8Be
- 8Bec
- 8C
- 8Cb

- 8F
- 8Fa
- 8Fb
- 8Fe
- 9Q
- 9Qa
- 9Qb
- 9Qc
- 9Qd
- 9Qdr
- 9T
- Produced under licence from Clerget, derived from the Clerget 9C, diesel radial engine.
- 9V
- 9Vr
- 9Vb
- 9Vbr
- 9Vbrs
- 9Vbs
- 9Vd
- 9V-10
- 9V-11
- 9V-16
- 9V-17
- 12B
- (1945)
- 12F
- 12Fd
- 12G
- (Type 50)
- 12Ga
- 12Gb
- 12H
- (Type 51)
- 12Ha
- 12Hb
- 12Hbr
- 12Hbxr
- 12J
- (Type 52)
- 12Ja
- 12Jb
- 12K
- Kb
- Kbrs
- 12L
- Lb
- Lbr
- Lbxr

- 12M
- (Type 57)
- 12Mb/500
- 12Mb/500r
- 12Mc/500
- 12Mcr/500
- 12Md
- 12Mdr
- 12Mdsh
- 12N
- (Type 61)
- 12Nb/650
- 12Nbr/650
- 12Nbrs/650
- 12Nc
- 12cNr:
- 12Ndr
- 12Ner
- 12Nfr
- 12Ngr
- 12Ns
- 12Nsr
- 12Ns Special
- 12Nsr Special
- 12X
- (Type 72)
- 12Xbr
- 12Xbrs
- 12Xbrg
- 12Xbr
- 12Xbrs
- 12Xbrs1
- 12Xdrs
- 12Xfrs
- 12Xgrs
- 12Xgrs1
- 12Xhrs
- 12Xhrs1
- 12Xirs
- 12Xjrs
- (Type 76) with 20 mm (0.787 in) calibre Hispano-Suiza HS.404 cannon between cylinder banks, firing through propeller shaft.
- 12Xcrs
- 12Xers
- 12Xirs
- 12Xjrs
- 12Xirs1
- 12Xjrs1
- 12X-13
- 12Y
- (Type 73)
- 12Ybr
- 12Ybrg
- 12Ybrs1
- 12Ygrs
- 12Ydr
- 12Ydrs
- 12Ydrs1
- 12Ydrs2
- 12Yfrs
- 12Yfrs1
- 12Yfrs2
- 12Y-21
- 12Y-25
- 12Y-26
- 12Y-27
- 12Y-28
- 12Y-29
- 12Y-38
- 12Y-39
- (Type 77) with 20 mm Hispano-Suiza HS.404 cannon between cylinder banks, firing through propeller shaft.
- 12Ybrs
- 12Ycrs
- 12Y-28
- 12Y-29
- 12Y-30
- 12Y-31
- 12Y-32
- 12Y-33
- 12Y-36
- 12Y-37
- 12Y-41
- 12Y-45
- 12Y-47
- 12Y 49
- 12Y-50
- 12Y-51

(Type 89)
- 12Z-1
- 12Z-17
- 12Z-89
- 14AA
- (Type 79)
- 14AA-00
- 14AA-01
- 14AA-02
- 14AA-03
- 14AA-04
- 14AA-05
- 14AA-06
- 14AA-07
- 14AB
- 14AB-12
- 14AB-13
- 14H
- 14Ha-7a
- 14Hbs
- 14Hbrs
- 14U
- Produced under licence from Clerget, derived from the Clerget 14F, diesel radial engine.
- Hispano Suiza 400hp V-16 120 mm × 130 mm (4.7 in × 5.1 in)[15]
- Hispano Suiza 600hp V-16 140 mm × 150 mm (5.5 in × 5.9 in)[15]
- 18S
- 18Sb
- 18Sbr
- 24Y
- (Types 82 and 90)
- 24Z (Type 95)
- 36Y
- 48H
- 48Z
- Abadal 12Y
- (HS 8 with a third inverted vertical bank) 260–300 kW (350–400 hp) at 2,500 rpm, with reduction gear, weighing 340 kg (750 lb).
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Hispano-Suiza in-house Type designations
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Data from:[1][2][3][4][5][6][8][9][10][12][13][14]
- Type 31
- Prototype, (bxs 120 mm × 120 mm (4.72 in × 4.72 in)), with mixed cooling (11 fins) and initial production 8A, (bxs 120 mm × 120 mm (4.72 in × 4.72 in)), with 8 cooling fins, 1,450 rpm, 110 kW (150 hp).
- Type 34
- 8Aa, 1800 rpm, 4.7:1 compression, 110 kW (150 hp), 100% water-cooling.
- Type 34-S
- (S for surcomprimé) 8Ab, 1800 rpm, 5.3:1 compression, 130 kW (180 hp), 100% water-cooling.
- Type 35
- 8B, 2,000 rpm, 150 kW (200 hp), geared.
- Type 35-S
- (S for surcomprimé) 8B, 2,000 rpm, 160 kW (220 hp), high compression, geared.
- Type 38
- 8BeC, Type 36 with a modified 37 mm (1.457 in) SAMC Model 37 cannon
- Type 39
- Coupled 150 kW (200 hp) engines
- Type 40
- (8E ?)[clarification needed]
- Type 41
- (8A ?)[clarification needed]
- Type 42
- 8Fb, (bxs 140 mm × 150 mm (5.51 in × 5.91 in)), 18.48 L (1,128 cu in), 220 kW (300 hp) at 1,800 rpm.
- Type 42VS
- 8Fe
- Type 43
- cannon equipped project
- Type 44
- A later, little used, moteur-canon version.
- Type 45
- 37 mm (1.457 in) cannon
- Type 50
- 12G
- Type 51
- 12H
- Type 52
- 12J
- Type 57
- 12M
- Type 61
- 12N
- Type 72
- 12X
- Type 73
- 12Y
- Type 76
- 12X with cannon
- Type 77
- 12Y with cannon
- Type 79
- 14AA
- Type 82
- 24Y
- Type 89
- 12Z
- Type 90
- 24Y
- Type 95
- 24Z
- Type 96
- 48Z
Specifications
Data from:[1][2][3][4][5][6][8][9][10][12][13][14] This table gives the major attributes of each engine model, where known.
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Applications and chronology
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References
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