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Imperial Japanese Army (Otsu-1)

 

Built in a large numbers, the French Salmson 2A2 was the most widely used reconnaissance aircraft 

in the final year of the First World War. So much was the amazement of the Japanese observers in France 
at its performance that several of these two-seater biplanes were sent to Japan and were later used to 
train the Japanese aircrew according to the most up-to-date flying techniques. Also, in 1919 the President 
of the Kawasaki Dockyard Company acquired not only the manufacturing rights to it, but also an army 
contract to build it. This became a reality in 1920 although the Japanese Army was only allowed to manu-
facture engines. Salmson representatives filed a protest, but the two parties came soon to a mutual 
agreement and worked in collaboration thereafter.
 

Otsu-1 was the first Japanese Army-built version of the French Salmson 2A2 produced in 1920. The 

Japanese-built 2A2 biplanes were almost identical to the original aircraft apart from minor modifications. 
Both the French and the Japanese experimented on alternative engines; however, due to overheating 
problems their production ceased. The modified Type Otsu-1 took part in the Russian Civil War in 1922 
and had a wide range of uses including bombing, liaison, light cargo transport and ration re-supply to 
name just a few. It remained the Japanese Army’s principal reconnaissance aircraft until 1933. After their 
release from the military service their popularity rose when they were sold as military surplus to civilian 
pilots and were used as mail planes.    

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Summary of Contents for French Salmson 2A2

Page 1: ...s came soon to a mutual agreement and worked in collaboration thereafter Otsu 1 was the first Japanese Army built version of the French Salmson 2A2 produced in 1920 The Japanese built 2A2 biplanes were almost identical to the original aircraft apart from minor modifications Both the French and the Japanese experimented on alternative engines however due to overheating problems their production cea...

Page 2: ...s and Wingshields Masks for Hinomaru Acetate for PE Wing shield Engine Photo Etched Main Photo Etched 1 Japanese Hotchkiss resin gun Color Reference Symbols Reference Decals Tips and tricks USE CA CYANOACRYLATE OR WHITE GLUE FOR DIFFERENT MATERIALS TAKE BASIC SAFETY PRECAUTIONS USE PHOTO ETCHED SAW FOR CUTTING SMALL THIN PARTS FROM SPRUE TREE STUDY INSTRUCTIONS CAREFULLY DECALS NEED ONLY 4 5 SEC I...

Page 3: ...2 ...

Page 4: ...1 Building and painting interior Left side D 84 B 14 D 28 D 89 D 27 D 26 D 25 D 66 D 67 D 68 D 8 Left side painting instructions Wood Aluminum Rigging Black Linen Cut along the groove ...

Page 5: ...4 2 Adding details to interior Left side Z O O M 3X Z O O M 3X D 60 D 58 D 62 D 30 D 31 D 70 28 29 Black Compass Compass Signal lamp holder Folded seat Unfolded seat Observer Gunner seat ...

Page 6: ...3 Building and painting interior Right side D 65 D 64 D 63 D 21 D 22 D 23 D 24 D 85 B 01 Cut along the groove Rigging Wood Linen Right side painting instructions Inside view Outside view ...

Page 7: ...Z O O M 3 X Z O O M 3 X PE 13 PE 14 PE 13 D 56 D 72 D 78 D 18 D 15 D 29 D 57 Black Aluminum Natural Metal Wood Linen Pilot s seat and stick Wireless antenna wire reel Morse telegraph key Wireless spark coil Magneto Antenna wire quide Pump D 19 Antenna Underside ...

Page 8: ...PE 36 D 92 D 33 D 44 D 43 D 46 D 92 D 86 D 32 D 87 PE 37 Cut along the groove Trim To Fit Late type ...

Page 9: ...8 6 Pilot s seat assembly Z O O M 3 X A 8 A 9 D 45 D 40 D 42 D 72 D 41 D 37 D 73 PE 25 PE 24 Trim To Fit Align to middle Position of safety belts is to some degree hypothetical Pump Trim wheel ...

Page 10: ...uselage Z O O M 3 X Z O O M 3 X D 50 D 17 D 9 Ce 1 D 7 D 6 A 9 PE 9 Pilot s seat attachment points Camera 26mm rear attachment Rear attachment points Close holes Altenative cameras to step 9 Rear camera Tail skid ...

Page 11: ...10 8 Ammo storage rack Cb 5 Cb 6 D 90 D 14 D 11 D 12 D 10 D 13 PE 19 PE 18 PE 31 Rigging Rigging Wood ...

Page 12: ...9 Adding alternative cameras D 5 Ce 1 D 16 D 4 D 20 A 8 D 3 D 2 Ce 1 D 1 Rigging Wood Dark Green 76 cm camera Only for 76 cm camera 50 cm camera ...

Page 13: ...12 D 54 D 55 D 53 D 52 B 13 D 88 D 79 Ammeter Electrical control panel Map or Film Pocket Wood Wood 50 cm camera ...

Page 14: ... D 82 Ce 2 PE 42 D 74 D 71 PE 41 PE 3 PE 15 PE 42 PE 39 PE 40 PE 3 PE 7 PE 17 PE 16 PE 15 PE 8 PE 5 PE 2 PE 1 PE 6 Altimeter Clock Tachometer Engine water temperature 31 34 33 32 Map Wood Black Aluminum Natural Metal Natural Metal Cockpit ...

Page 15: ...12 14 Closing fuselage D 83 B 11 B 12 B 12 Left side Right side Cut along the groove ...

Page 16: ...13 Adding exterior detail 14 Jig assembly D 69 D 38 D 39 D 81 D 80 Wire 0 4 Ø mm Jig layout Jig Jig base not included D 75 ...

Page 17: ...16 15 Adding lower wings Z O O M 3 X Z O O M 3 X Z O O M 3 X Z O O M 3 X A 7 A 1 D 34 A 2 Ce 4 Acetate film Ce 4 PE 11 PE 20 Windshield ...

Page 18: ...16 Adding upper wing aileron and Rigging ZOO M 3 X PE 21 A 10 A 5 A 6 A 4 A 3 ...

Page 19: ...18 We recommend Τype B Τype C and Αnchor points 1 48 Gaspatch metal turnbuckles ...

Page 20: ...carriage ZOOM 3 X ZOOM 3 X Cd 10 Cd 11 Cd 13 Cd 12 Cd 9 Cd 2 Cd 1 Cd 4 Cd 3 Cd 6 Cd 5 Cd 7 Cd 8 Cd 15 Cd 14 USE CA CYANOACRYLATE GLUE FOR THE WHEELS Early type US Early type French Late type US Late type French ...

Page 21: ...3 B 6 D 47 D 49 PE 22 PE 27 D 48 Rigging Rigging Rigging opened closed closed opened USE PHOTO ETCHED SAW FOR CUTTING SMALL THIN PARTS FROM SPRUE TREE Trim To Fit Cut and replace green part with double wires You can replace green part with double wires ...

Page 22: ...19 Scarfring assembly PE 26 EPE 7 EPE 6 PE 28 PE 30 PE 29 Ca 8 Ca 10 Ca 5 Ca 9 Resin gun C 14 Ca 4 Ce 3 Ca 1 Ca 2 Ca 3 C 13 C 12 Rigging Camera 26 cm Hotchkiss gun ...

Page 23: ...20 Engine 9Z assembly 22 C 2 B 4 D 35 D 36 C 5 B 4 C 10 C 6 C 11 C 3 C 9 C 1 C 4 EPE 4 EPE 5 EPE 1 EPE 2 EPE 3 ...

Page 24: ...21 Mount the engine to the main body of the plane ZOOM 3X PE 12 PE 4 PE 10 Cb 3 C 8 C 7 B 10 B 5 Tube Vickers Gun ...

Page 25: ...22 Engine paint instructions 24 Black Black Natural Metal Dull Red Aluminum Aluminum Aluminum Exhaust ...

Page 26: ...23 Paint Decal instructions Nat Insignia painting mask 2 2 10 10 1 7 1 19 19 24 21 11 21 11 20 Maroon Exhaust Silver Dope natural metal panels ...

Page 27: ...Nat Insignia painting mask 26 2 2 4 5 3 1 6 4 1 24 21 13 21 13 22 Maroon Exhaust Silver Dope natural metal panels ...

Page 28: ...Nat Insignia painting mask 2 2 1 1 26 21 15 21 9 15 Maroon Exhaust Silver Dope natural metal panels 19 19 Decals 16 18 specify manufacture date use them accordingly ...

Page 29: ...28 Nat Insignia painting mask 2 2 1 1 25 21 12 21 14 12 Maroon Silver Dope natural metal panels 19 19 Decals 16 18 specify manufacture date use them accordingly 22 Exhaust ...

Page 30: ...Nat Insignia painting mask 2 2 1 1 27 21 8 21 8 Maroon Silver Dope natural metal panels 19 19 Decals 16 18 specify manufacture date use them accordingly Exhaust ...

Page 31: ...30 Control cables Elevator control cables Rudder control cables Basic fuel system 24 ZOO M 3 X ZOO M 3 X Rigging Rigging ...

Page 32: ... www gaspatchmodels com Manual is also available for download from www gaspatchmodels com Salmson 2A2 1 48 Late Type Salmson 2A2 1 48 Mid Type Salmson 2A2 1 48 Otsu1 Decal templates Use the templates to cut decals For the rudder leave half millemeter around ...

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