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Seversky P-35

The Seversky P-35 was the first all-metal monoplane Pursuit plane with a rotary engine and retractable landing gear operated by the USAAC.  Per reference [8] it took its first flight on 15 August 1935 and entered active service with the US armed forces in 1937.  In addition to the USAAC, 60 export versions of this type of aircraft were sold to Sweden, which were designated EP-106 by Seversky ot J-9 by the Swedish Air Force.  In the lead up to the United State's involvement in WWII the US government eventually banned the sales of additional aircraft overseas to most countries other than the UK, but eventually did transfer six air craft to Ecuador as well as transferring some ex-USAAC aircraft to the Phillipine Airforce as USAAC squadrons in that country transitioned to P-40 type aircraft.  A total of 196 aircraft of this type aircraft were built in addition to a navalized prototype called the NF-1 which competed against the F2A and early F4F designs for a US Navy contract.

The landing gear retracted straight back into faired housings that extended below the wing, and the aircraft also had a "plexiglass: razorback configuration aft the cockpit, as shown below, somewhat similar to the configuration on the Brewster F2A/239/339 design.

As shown in the images below distinguishing features of this aircraft including;
P-35
[Image Sources: US Government/Public Domain via Ref [8] - as annotated by this site]

P35_3-view_A
[Source: Ref [14a] - US Government/Public Domain]

The table below summarizes the current data collected on this type aircraft, identifying sources for the data

    P-35 Secondary SourcesNotes
Primary Source2
No of Crew   1
Engine:  
   Qty   1
   Model   R-1830-9 5
   Displacement  (cu in) 1830 5
   Power  
     Military (HP)
     War Emergency (HP)
    Normal (HP) 850 5
    Take Off (HP) 950 5
   Eng Dims  
     Length (ft) 4.64 5
     Width/Dia (ft) 4 5
     Height (ft)
   Base Engine Wt (lb) 1292 5
Propeller  
   # Blades   3
   Dia (ft)
   Manufacturer  
   Type  
Wing  
   Span (ft) 36
   Root Thickness (%) 18.0%
  (in) 16.4
   Total Area  (sq ft) 220
     Wing (less Ailerons & Flaps) (sq ft)
     Ailerons (sq ft)
     Flaps (sq ft)
Tail Area (sq ft) 54.2 3
   V Tail Area (sq ft) 19.1 3
     Fin (sq ft)
     Rudder (sq ft)
   H Tail Area (sq ft) 35.1 3
     Stabilizer (sq ft)
     Elevator (sq ft)
Total Control Surf Area (sq ft)
Length  
   Overall (ft) 25.3
   Fuselage (ft) 23.2
   Body  (ft) 24.2
     Body Depth (ft)
    Body Width (ft)
Fuel Tank Volume (gal)
   Wing Tanks (gal)
    FuselageTanks (gal)
Oil Tank Volume (gal)
Water Injection Fluid Tank Volume (gal)
Wetted Area (sqf) (sq ft)
Pwr Ldng (lb/HP) 5.89
Wing Ldng (lb/sq ft) 25.45
Struct. Des. GW  (lb)
Ultimate Load Factor (G's)
Design Speed (mph)
Not to Exceed Speed (mph)
     
Total Struct Weight   2043
   Total Wing   785
     Wing    
     Ailerons    
     Flaps    
     Fuselage Carry-Through    
   Tail   125
     H Tail   86
       Stabilizer    
       Elevator    
     V Tail   39
       Fin    
       Rudder    
   Body + Eng Section + LG  
   Body + LG   1133
   Body   669
     Fuselage    
     Engine Section    
   Landing Gear   464
     Mn Landing Gr   399
     Tail/Nose Aux LG   65
   Tail Hook  
   Booms  
   Nacelles  
Total Propulsion Weight   1828
   Engine w/ Accessories   1384
   Engine(s) as Installed   1291
     Accessories   93
    Turbocharger(s)  
   Controls   25
   Propeller(s)   319
     2-Blade    
     3-Blade   319
     4-Blade    
   Starting System   43
   Water Injection System  
     Tanks    
     Piping Etc    
   Cooling System  
   Lube System   32
     Tanks    
     Piping Etc    
   Fuel System   25
     Tanks    
     Piping Etc    
Total Sys. & Eqpmt.   444
   Instruments   45
   Surface Controls    107
   Hydraulics  
   Electrical Equip   173
Electronics (Purple means incl in Furn/Gray in Useful Ld)    
   Arm Prov/Equipment & Armor  
    Furnishings   119
   Anti-Ice (If not in Furn)  
   Other /Misc  
     Hoisting Gear  
     Floatation Gear  
     Armor Plate    
   
Empty Wt   4315
Basic Mission Useful Load   1284
   Crew   200
   Equipment  
   Oil   92
   Fuel   660
   Fuel & Oil Trapped in Systems  
   Water Solution for Engine Injection  
   Bombs/Torp Etc  
   Radio (if Not Included in Empty Wt)  
   Nav Equipment  
   Oxygen System  
   Armament   189
     Guns & Ammo   189
       Guns   96
       Ammo   93
     Pyrotechnics    
     Camera    
     Other    
   Other Useful Load   143
Basic Mission GW   5599

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 3-16-25

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