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Dornier Do P.254 (Do 535 / He 535)

Nazi Germany (1945)

Detailing the development and operational history of the Dornier Do P.254 (Do 535 / He 535) Mixed-Propulsion Heavy Fighter Aircraft Proposal.

 Entry last updated on 1/22/2017; Authored by Staff Writer; Content ©www.MilitaryFactory.com



  Dornier Do P.254 (Do 535 / He 535)  
Picture of Dornier Do P.254 (Do 535 / He 535) Mixed-Propulsion Heavy Fighter Aircraft Proposal


The Dornier P.254 project was a mixed-powerplant version of the Do 335 Arrow heavy fighter - it did not proceed beyond the paper stage.

The Dornier Do P.254 project existed as a short-lived outgrowth of the Do 335 "Pfeil" ("Arrow") heavy fighter program. In the Do 335, an engine was fitted to the nose of the aircraft in the usual way ("puller" arrangement) but the airframe also made room aft for carrying a second engine, driving a propeller unit at the tail in a "pusher" arrangement. The combined powerplants made the Do 335 the fastest prop-driven aircraft to come out of Germany in World War 2. However, engine delays led to limited operational examples before the end of the war in 1945 and only thirty-seven or so were delivered. The aircraft project was also eclipsed by the Focke-Wulf Ta 152 high-altitude fighter.

The P.254 (Do 535) was to benefit from the foundation laid in the Do 335 in keeping the nose-mounted Daimler-Benz DB603A piston engine at the nose but substitute the tail propulsion system for a Heinkel-Hirth HeS 011 turbojet engine for an additional thrust output of 2,866lb. Theoretically, the P.254 would become an even faster prop-driven system than the Do 335 but it lacked swept-back wings benefitting flight at higher speeds. With the German Air Ministry favoring the more conventional, competing Ta 152 high-altitude fighter, Dornier engineers hoped the addition of a jet engine to their Do 335 would keep the promising heavy fighter program alive for a time longer.

It is unclear what over-battlefield role the P.254 would have had upon reaching operation service but it may have been in line with the usual German late-war push for viable fighters, interceptors and night-fighters needed to content with the Allied day-night bombing campaigns. There was most likely a secondary role of high-speed bombing to be built in.

Despite the venture, no P.254 aircraft were built from the existing Do 335 design and the program was eventually dropped from serious consideration - but not before being passed on to Heinkel during October of 1944 and recast as the He 535.
Any available statistics for the Dornier Do P.254 (Do 535 / He 535) Mixed-Propulsion Heavy Fighter Aircraft Proposal 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).
Dornier Do P.254 Specifications
National Flag Graphic
Nazi Germany
Year: 1945
Type: Mixed-Propulsion Heavy Fighter Aircraft Proposal
Manufacturer(s): Dornier Flugzeugwerke / Heinkel - Nazi Germany
Production: 0
Supported Mission Types
Air-to-Air
Interception
Unmanned
Ground Attack
Close-Air Support
Training
Anti-Submarine
Anti-Ship
Airborne Early Warning
MEDEVAC
Electronic Warfare
Maritime/Navy
Aerial Tanker
Utility/Transport
Passenger Industry
VIP Travel
Business Travel
Search/Rescue
Recon/Scouting
Special Forces
X-Plane/Development
Structural
Crew: 1
Length: 45.44 ft (13.85 m)
Width: 45.28 ft (13.80 m)
Height: 14.93 ft (4.55 m)
Empty Weight: 16,755 lb (7,600 kg)
MTOW: 22,267 lb (10,100 kg)


Installed Power
1 x Daimler-Benz DB603A 12-cylinder inverted engine developing 1,725 horsepower and driving a three-bladed propeller at the nose; 1 x Heinkel-Hirth HeS 011 turbojet engine in aft fuselage developing 2,866lb of thrust.

Standard Day Performance
Maximum Speed: 525 mph (845 kph; 456 kts)
Maximum Range: 932 mi (1,500 km; 810 nm)
Service Ceiling: 40,026 ft (12,200 m; 7.58 mi)
Rate-of-Climb: 2,300 ft/min (701 m/min)


Armament
ASSUMED (based on Do 335):
1 x 30mm MK 103 cannon firing through the propeller hub in nose.
2 x 20mm MG 151/20 cannons in engine cowling synchronized to fire through the spinning propeller blades.

OPTIONAL:
Up to 2,200lb of externally-held drop stores.


Operators List
Nazi Germany (cancelled)

Series Model Variants
• P.254 - Base Project Designation
• Do 535 - Alternative project designation
• He 535 - Revised designation


Supported Weapon Systems
Graphical image of an aircrat automatic cannon
Graphical image of an aircraft conventional drop bomb munition