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Curtiss H-75/P-36 Hawk

The Curtiss H-75 Hawk was an all-metal monoplane Pursuit aircraft with a rotary engine and retractable landing gear operated by the USAAC.  Per reference [8] it took its first flight on 6 May 1935.  A variant designated the P-36 was procured by the USAAC and entered in 1938.  In addition, other variants were procured by numerous air forces around the world, including France, Norway, Portugal, Peru, Brazil, Argentina, the Dutch East Indies, the UK, India, South Africa, China, Persia, Thailand (Siam), Argentina, and Finland (which used ex-French aircraft that had been captured by Germany).  In UK and Commonwealth service this aircraft was also called the Mohawk I-IV, depending on variant.

Per reference [8] 215 P-26 aircraft were procured by the US with approximately 900 H-75 export versions also being produced.  While the P-36 and some export versions had retractable landing gear, other export versions had fixed gear.  The primary three varaints that are included in the aircraft being analyzed at this website include the P-36A which was fitted with an R-1830 engine with a take-off rating of 1050 HP, an H-75A export model fitted with an R-1830/S3C3G engine with a take-off rating of 1100HP, and an H-75A export model fitted with an R-1820 engine with a take-off rating of 1100HP.

As shown in the images below distinguishing features of this aircraft including;
P-36_H-75A
[Image Sources: Public Domain via Ref [8] - as annotated by this site]

The table below summarizes the current data collected on this type aircraft, identifying sources for the data
    Curtiss Curtiss Curtiss Source 2,3,4,5 Notes
    P-36A H-75A (CW) H-75A (P&W)
No of Crew   1 1 1
Engine:  
   Qty   1 1 1
   Model   R-1830-13 R-1820-G105A P&W S3C3G
   Displacement  (cu in) 1830 1820 1830
   Power  
     Military (HP) 1100
     War Emergency (HP)
    Normal (HP) 900 900 950
    Take Off (HP) 1050 1100 1100
   Eng Dims  
     Length (ft) 4.94 4.01 5.13
     Width/Dia (ft) 4.005 4.59 4.01
     Height (ft)
   Base Engine Wt (lb) 1292 1287 1463
Propeller  
   # Blades   3 3 3
   Dia (ft) 10 10.5 10.125
   Manufacturer   Curtiss (Elec) Curtiss (Elec)
   Type   Const Speed Const Speed Sonst Speed
Wing      
   Span (ft) 37.3 37.3 37.3
   Root Thickness (%) 15.0%
  (in) 16.2
   Total Area  (sq ft) 236 236 236
     Wing (less Ailerons & Flaps) (sq ft) 182.79 182.79
     Ailerons (sq ft) 18.41 18.41
     Flaps (sq ft) 34.8 34.8
Tail Area (sq ft) 68.74 68.74 68.74
   V Tail Area (sq ft) 20.74 20.74 20.74
     Fin (sq ft) 7 7
     Rudder (sq ft) 13.74 13.74
   H Tail Area (sq ft) 48 48 48
     Stabilizer (sq ft) 28.8 28.8
     Elevator (sq ft) 19.2 19.2
Total Control Surf Area (sq ft) 86.15 86.15
Length  
   Overall (ft) 28.85 28.8 28.8
   Fuselage (ft) 24.4 26.8 26.8
   Body  (ft) 26.8  
     Body Depth (ft)
    Body Width (ft)
Fuel Tank Volume (gal) 163 163 163
   Wing Tanks (gal) 105 105 105
    FuselageTanks (gal) 58 58 58
Oil Tank Volume (gal)
Water Injection Fluid Tank Volume (gal)
Wetted Area (sqf) (sq ft)
Pwr Ldng (lb/HP) 5.27 5.17 6.38
Wing Ldng (lb/sq ft) 23.44 24.11 25.08
Struct. Des. GW  (lb)
Ultimate Load Factor (G's) 12 11.5
Design Speed (mph) 445 445
Not to Exceed Speed (mph) 403
       
Total Struct Weight   1923 2041 2062
   Total Wing   814 842 835
     Wing      
     Ailerons      
     Flaps      
     Fuselage Carry-Through      
   Tail   107 112 117
     H Tail   74  
       Stabilizer      
       Elevator      
     V Tail   33  
       Fin      
       Rudder      
   Body + Eng Section + LG  
   Body + LG   1002 1087 1110
   Body   470 515 543
     Fuselage      
     Engine Section      
   Landing Gear   532 572 567
     Mn Landing Gr   488  
     Tail/Nose Aux LG   44  
   Tail Hook  
   Booms  
   Nacelles  
Total Propulsion Weight   2004 1985 2170
   Engine w/ Accessories   1458  
   Engine(s) as Installed   1352  
     Accessories   106  
    Turbocharger(s)  
   Controls   7
   Propeller(s)   318
     2-Blade      
     3-Blade   318  
     4-Blade      
   Starting System   40
   Water Injection System  
     Tanks      
     Piping Etc      
   Cooling System  
   Lube System   27
     Tanks      
     Piping Etc      
   Fuel System   154
     Tanks      
     Piping Etc      
Total Sys. & Eqpmt.   431 457 481
   Instruments   59
   Surface Controls    90
   Hydraulics  
   Electrical Equip   124
Electronics (Purple means incl in Furn/Gray in Useful Ld)   66
   Arm Prov/Equipment & Armor  
    Furnishings   92
   Anti-Ice (If not in Furn)  
   Other /Misc  
     Hoisting Gear  
     Floatation Gear  
     Armor Plate      
   
Empty Wt   4358 4483 4713
Basic Mission Useful Load   1173 1206 1206
   Crew   200 200 200
   Equipment  
   Oil   68 75 75
   Fuel   630 630 630
   Fuel & Oil Trapped in Systems  
   Water Solution for Engine Injection  
   Bombs/Torp Etc  
   Radio (if Not Included in Empty Wt)   112 112
   Nav Equipment  
   Oxygen System   15 15
   Armament   189 174 174
     Guns & Ammo   189  
       Guns   96  
       Ammo   93  
     Pyrotechnics     3 3
     Camera      
     Other      
   Other Useful Load   86
Basic Mission GW   5531 5689 5919

Notes: This website has been developed with a number of low cost or free programs including Hot Metal Pro, KompoZer, MicroSoft Designer and Da Button Factory.com

Rev 3-7-25

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