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Fokker D.XXIII

Netherlands (1939)
Picture of Fokker D.XXIII Twin-Engine, Single-Seat Fighter Prototype Aircraft

Just one D.XXIII flying prototype was completed by Fokker prior to the German invasion of May 1940.


Detailing the development and operational history of the Fokker D.XXIII Twin-Engine, Single-Seat Fighter Prototype Aircraft.  Entry last updated on 5/15/2018. Authored by Staff Writer. Content ©www.MilitaryFactory.com

One of the inherent issues of flying single-engined, propeller-driven fighter-type aircraft of the 1930s was the natural "pull" of the airframe to one side or the other due to torque (caused by the spinning motion of the propeller blades). The pilot was typically forced to manually compensate for this and only the addition of a second engine to help offset this pulling action was found as the best solution. In The Netherlands, just prior to World War 2 (1939-1945), Marius Beeling was at work on a new type of single-seat, twin-engine fighter design which attempted to remedy this issue in a different way - by having both engines seated in tandem along the fuselage, one arranged to "pull" the aircraft through the skies and the other arranged to "push" it.

The resulting aircraft was the Fokker D.XXIII which flew for the first time in prototype form on May 30th, 1939. Its general shape involved a center-set fuselage "pod" containing both engines as well as the cockpit and avionics. To this was added a wing mainplane fitted under the fuselage and extending out straight with rounded wingtips. From each wing leading edge originated tail booms which extended to the rear of the aircraft. These appendages were then joined by a shared horizontal stabilizer and this horizontal plane was straddled at either end by small-area, rounded vertical fins. A rather modern tricycle undercarriage, fully retractable, was fitted for ground running.

As tested, the aircraft was powered through 2 x Walter Sagitta I-SR 12-cylinder air-cooled piston engines developing 530 horsepower each and driving three-bladed propeller units fore and aft of the fuselage. Listed specs included a maximum speed of 326 miles per hour, a range out to 522 miles and a service ceiling of 30,000 feet.

Proposed armament became 2 x 13.2mm heavy machine guns and 2 x 7.9mm medium machine guns.

Of seemingly sound design, good overall performance and generally well-armed for its time, the D.XXIII was a promising single-seat fighter heading into the wartime period.

To move the test phase along the prototype was completed with thick wooden wing mainplanes whereas the production-quality fighter was to feature all-metal construction. Tested indicated overheating issues with the rear-mounted air-cooled engine which was natural given its placement within the fuselage (and lack of direct air flow). Only about four hours of testing were had on this Dutch fighter prototype before the German invasion of May 1940 ended all hope for its contribution in the defense of The Netherlands. The program was not resurrected during the war nor in the post-war period leaving the D.XXIII as nothing more than a footnote in World War 2 aviation.

Any available statistics for the Fokker D.XXIII Twin-Engine, Single-Seat Fighter Prototype Aircraft are showcased in the areas immediately below. Categories include basic specifications covering country-of-origin, operational status, manufacture(s) and total quantitative production. Other qualities showcased are related to structural values (namely dimensions), installed power and standard day performance figures, installed or proposed armament and mission equipment (if any), global users (from A-to-Z) and series model variants (if any).






Our Data Modules allow for quick visual reference when comparing a single entry against contemporary designs. Areas covered include general ratings, speed assessments, and relative ranges based on distances between major cities.

Image of collection of graph types

Relative Maximum Speed Rating
Hi: 400mph
Lo: 200mph
    This entry's maximum listed speed (326mph).

    Graph average of 300 miles-per-hour.
City-to-City Ranges
NYC
 
  LON
LON
 
  PAR
PAR
 
  BER
BER
 
  MOS
MOS
 
  TOK
TOK
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Graph showcases the Fokker D.XXIII's operational range (on internal fuel) when compared to distances between major cities.
Aviation Era
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Pie graph section
Pie graph section
Pie graph section
Pie graph section
Useful in showcasing the era cross-over of particular aircraft/aerospace designs.
Unit Production Comparison
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units
1
1


  * Commercial Market High belongs to Cessna 172.

  ** Military Market High belongs to Ilyushin Il-2.


Altitude Visualization
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  Compare this entry against other aircraft using our Comparison Tool  
National Flag Graphic
Origin: Netherlands
Year: 1939
Type: Twin-Engine, Single-Seat Fighter Prototype Aircraft
Manufacturer(s): Fokker - Netherlands
Production: 1
Status: Cancelled
Global Operators:
Netherlands (cancelled)
Historical Commitments / Honors:

Military lapel ribbon for Operation Allied Force
Military lapel ribbon for the Arab-Israeli War
Military lapel ribbon for the Battle of Britain
Military lapel ribbon for the Battle of Midway
Military lapel ribbon for the Berlin Airlift
Military lapel ribbon for the Chaco War
Military lapel ribbon for the Cold War
Military lapel ribbon for the Cuban Missile Crisis
Military lapel ribbon for the Falklands War
Military lapel ribbon for the French-Indochina War
Military lapel ribbon for the Golden Age of Flight
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon for the Indo-Pak Wars
Military lapel ribbon for the Iran-Iraq War
Military lapel ribbon for the Korean War
Military lapel ribbon for the 1982 Lebanon War
Military lapel ribbon for the Malayan Emergency
Military lapel ribbon for the attack on Pearl Harbor
Military lapel ribbon for the Six Day War
Military lapel ribbon for the Soviet-Afghan War
Military lapel ribbon for the Spanish Civil War
Military lapel ribbon for the Suez Crisis
Military lapel ribbon for the Vietnam War
Military lapel ribbon for Warsaw Pact of the Cold War-era
Military lapel ribbon for the WASP (WW2)
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2
Military lapel ribbon for the Yom Kippur
* Ribbons not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective campaigns/operations.
Measurements and Weights icon
Structural - Crew, Dimensions, and Weights:
Unless otherwise noted the presented statistics below pertain to the Fokker D.XXIII model. Common measurements, and their respective conversions, are shown when possible.

Operational
CREW


Personnel
1


Dimension
LENGTH


Feet
33.46 ft


Meters
10.2 m


Dimension
WIDTH


Feet
37.73 ft


Meters
11.5 m


Dimension
HEIGHT


Feet
12.47 ft


Meters
3.8 m


Weight
EMPTY


Pounds
4,806 lb


Kilograms
2,180 kg


Weight
LOADED


Pounds
6,504 lb


Kilograms
2,950 kg

Engine icon
Installed Power - Standard Day Performance:
2 x Walter Sagitta I-SR air-cooled radial piston engines developing 530 horsepower each and driving three-bladed propeller units.

Performance
SPEED


Miles-per-Hour
326 mph


Kilometers-per-Hour
525 kph


Knots
283 kts


Performance
RANGE


Miles
522 mi


Kilometers
840 km


Nautical Miles
454 nm


Performance
CEILING


Feet
29,528 ft


Meters
9,000 m


Miles
5.59 mi

Supported Weapon Systems:

Graphical image of an aircraft medium machine gun
Graphical image of an aircraft heavy machine gun
Armament - Hardpoints (0):

PROPOSED:
2 x 13.2mm heavy machine guns
2 x 7.9mm medium machine guns
Variants: Series Model Variants
• D.XXIII - Base Series Designation; single prototype completed.