Fokker Dr.I

Specifications

Aircraft Type:            Single seat triplane fighter

Manufacture:                Fokker Flugzeugwerke mbH, Schwerin in Mecklenberg

Designation:                  Fokker V5

Military Designation:     Fokker Dr I

Introduced:                   August 1917

Number Built:               320

Length:                         18' 11"             5,770 mm

Height:                          9' 8"                 2,950 mm

 

Wingspans:                  

Top Wing:                    23' 7"               7,190 mm 

Middle Wing:                20' 5"               6,225 mm

Lower Wing:                18' 9"               5,725 mm

Wing Chord                 3' 3"                 1,000 mm

Wingarea:                     200.9 Sq Ft    18.66 Sq m

 

Empty Weight:               895.00 lbs            405.00Kg

                         893.00 lbs            "Fighter Aircraft of the 1914-1918 war"

Gross Weight:               1295.00 lbs            587.00Kg

                        1,289.00 lbs            "Fighter Aircraft of the 1914-1918 war"  

   

Engine:                        LeRhône type 9Ja                 Oberursel  UR II  

                                    French made / preferred            Germany's copy of the LeRhône

Interments:                    LeRhône Revolution counter      n/a

Ignition:                        Magneto (Boch ZH6)                Magneto (Boch ZH6)

Lubrication:                  Castor oil                                  Castor oil

Horsepower:                110 hp (84 kw)                         110 hp (82 kw)

Cylinders:                     9 Cylinders                                9 Cylinders

RPMs                          1,200 RPM                               n/a

Bore:                            112 mm                                    124 mm

Stroke:                         170 mm                                    150 mm

Displacement:               920 in3                                                   955 in

Cooling:                        Air-cooled                                Air-cooled

Weight:                         330 lb (149 kg)                         n/a

Fuel Tank:                    18 Gallons                                 72 Liters

Fuel Consumption:                                                          46 Liters/hr

Oil tank:                                                                         13 Liters - Only 10 liters would be used.

Oil Consumption:                                                             6 Liters/hr

Engine Gauges:             RPM indicator, Fuel gauge, Oil Pulsator

Other known engines:   Oberursel  UR III, Siemens-Halske Sh.3, Goebel Goe. II,

                                    Goebel Goe. III, Clerget 

 

Propeller:                   Axial Proppellerwerk AG, Berlin                    

Diameter                      8' 7"                 2,620 mm

Pitch                            7' 6"                 2,300 mm

Blade width                 0' 9"                    230 mm

Hub                             8 holes

Lamination                   3 layers of walnut, 4 layers of birch 

Lamination Thickness   3/4"                      20 mm each layer

Other Manufactures:    Hugo Heine Propellerwerk, C. Lorenzen Luftschraubenbau (both in Burlin)

 

Armament:

Two 7.92mm Spandau LMG 08/15 (Lightened Machine Gum)

Manufacturer:    Spanuau Arsenal Deutsche Waffen und Munitionsfabrik AG 

Caliber:             7.92 mm x 57 mm

Drums:              2-500 rounds belts

Rate of Fire:      450 - 500 RPM

                         Belt fed made from canvas/hemp 550 rounds each.

Length:             1175 mm

Weight :            26.5 pounds (empty) (11.90 kg) 

Barrel:              718 mm

Muzzle-

velocity:           892 m/sec

Air Cooled

Operating-

    method:          Short - Recoil

 

Performance

Maximum Speed:  115 mph      185 km/h     100 kt

                                    115 mph @ sea Level

                                    103 mph @ 13,100 Ft

                                    80 mph @ 18,000 Ft

                                   

Endurance:                   1.5 hours  

Takeoff run:                                          50-100m

Landing run:                                          50m

 

Ceiling:                         23,000 Ft         7,000 m

Ceiling:                       19,000 Ft            "Fighter Aircraft of the 1914-1918 war"

                                    20,013 Ft        6,100 m

Climb Rate:                  3 min 45 sec to 6,500 Ft                     1,000 m in approx. 2.9min

                                    6 min   3 sec to 9,800 Ft                     2,000 m in approx. 5.5min

                                    10 min 0 Sec to 13,100 Ft                  3,000 m in approx. 9.3min

                                    14 min 3 Sec to 16,400 Ft                  4,000 m in approx. 13.9min

                                                                                              5,000 m in approx. 21.9min

Construction  

Fuselage:                      20mm steel tubing braced with 18 gauge steel wire,

                                    Plywood fairings both covered with fabric. The bottom piece is lanced.

Top Wing:                    7,190 mm  Plywood ribs, wood box type main spare,

Middle Wing:                6,225 mm

Lower Wing:                5,725 mm

Wing Chord                 1,000 mm

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