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Heinkel P.1073 (Strahljager)


Single-Seat, Twin-Engine Jet Fighter Concept (1945)


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The resulting Heinkel He 162 Volksjager jet fighter of Nazi Germany was born from a series of studies derived from the P.1073 concept.



Authored By: Staff Writer | Last Edited: 09/06/2019 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.
In an effort to head-off any possible single-seat jet fighter developments by the Allies in World War 2 to compete with its vaunted Messerschmitt Me 262 "Schwalbe" single-seat, twin-engine jet fighter, German authorities were already on the lookout for a high-performance successor taking advantage of a thin, sharply-swept wing mainplane, advanced aerodynamics, and a twin-turbojet propulsion scheme. For Heinkel engineers in July 1944, this gave rise to the "P.1073" project - a form which would eventually influence the soon-to-be He 162 "Volksjager" design - the "People's Fighter" - detailed elsewhere on this site.

The P.1073 mimicked some of the form-and-function to be finalized in the He 162: the single-crew cockpit was seated at the extreme front-end of the well-contoured fuselage with excellent vision over the nose. The fuselage's shape tapered towards the rear to which a "V-style" tailplane arrangement was to be featured - negating the use of horizontal tailplanes altogether. The mainplanes, of slim chord, were well-swept towards the rear, noticeably lengthy, and positioned ahead of midships. These members were further mid-mounted along the sides of the fuselage.

The propulsion scheme was rather unique as World War 2 jet fighters went: one turbojet was to be fitted in an integrated housing over the fuselage at midships and a second unit would be positioned under the cockpit floor - this done to protect the pilot in the event of a bailout, improve pilot vision out-of-the-cockpit, and reduce the drag encountered with underslung wing engines (as in the Me 262). As a tricycle undercarriage was planned for ground-running, a nose leg would be set under the cockpit as well - this necessitated the underslung turbojet be fitted slightly offset to starboard for clearance of the nose leg (which itself would be slightly favoring the port side). The main legs would recess under each wing member.

Proposed power would come from 2 x Heinkel HeS 011 turbojet engines offering 3,305lb of thrust each. Because these engines had yet to reach serial production, 2 x Junkers Jumo 004 turbojets would be fitted for the interim, these offering a lower-rated output of 2,237lb of thrust.

As drawn up, the airframe carried a length of 33.9 feet, a wingspan of 39.2 feet, and a height of 11 feet. Empty weight was 9,722lb against an MTOW of 13,500lb. Estimated performance included a maximum speed of 630 miles-per-hour, a maximum operational range of 620 miles, and a service ceiling up to 46,000 feet )all assuming the HeS 011 turbojets being installed, otherwise figures were considerably reduced with the Junkers types).

There was an option for the aircraft to carry a pair of integrated underwing fuel tanks to help increase operational ranges.

For armament, the fighter was to sport a battery of 3 x 20mm MG151/20 automatic cannons in the nose, one mounted to port side and the remaining two to starboard. Alternately, the armament suite was also detailed as 2 x 30mm MK108 automatic cannons (all in the nose).

The original P.1073 design was the "P.1073.01.4" detailed above and a further evolution of the design became the "P.1073.01.8" which was projected as a high-altitude reconnaissance platform. An upswept wing of higher aspect ratio was planned in this offering. The third, and final notable, iteration of the design became "P.1073.02" which differed mainly in its use of a forward-swept wing mainplane arrangement. It is said that at least twenty offshoots of the P.1073 existed at some point.

In the end, none of these forms found favor with the RLM (German Air Ministry) but the P.1073 idea was pushed to become the He 162 in October of 1944. The aircraft had changed to become a single-engine design (dorsal-mounted turbojet) with a twin-rudder tail unit and unswept wing mainplanes - the aircraft made as simple to operate and maintain as possible due to the losing German war effort heading into 1945. Three-hundred twenty (320) examples were eventually completed of this compact fighter with a first-flight undertaken on December 6th of 1944. Service introduction began as soon as January of 1945 but the design held little sway in the ultimate outcome of the war - in May of 1945, Germany was defeated.

Has the P.1073 project, in its original form, been pursued beyond the concept stage, there no doubt would have arisen issues regarding its unorthodox arrangement - which would have been noticed by RLM authorities - sure to cause Center-of-Gravity (CoG) issues during testing. There was also the danger of a pilot ejection just ahead of the dorsal intake opening - which would have presented problems all its own, particularly at high speeds.

Specifications



Service Year
1945

Origin
Nazi Germany national flag graphic
Nazi Germany

Status
CANCELLED
Development Ended.
Crew
1

Production
0
UNITS


Heinkel - Nazi Germany
National flag of modern Germany National flag of Nazi Germany Nazi Germany (abandoned)
(OPERATORS list includes past, present, and future operators when applicable)
Air-to-Air Combat, Fighter
General ability to actively engage other aircraft of similar form and function, typically through guns, missiles, and/or aerial rockets.
Interception
Ability to intercept inbound aerial threats by way of high-performance, typically speed and rate-of-climb.
X-Plane (Developmental, Prototype, Technology Demonstrator)
Aircraft developed for the role of prototyping, technology demonstration, or research / data collection.


Length
33.9 ft
(10.32 m)
Width/Span
39.4 ft
(12.00 m)
Height
11.2 ft
(3.40 m)
Empty Wgt
9,722 lb
(4,410 kg)
MTOW
13,448 lb
(6,100 kg)
Wgt Diff
+3,726 lb
(+1,690 kg)
(Showcased structural values pertain to the Heinkel He P.1073 production variant)
Installed: PLANNED: 2 x Heinkel HeS 011 turbojet engines developing 3,305lb of thrust each; INTERIM: 2 x Junkers Jumo 004 turbojet engines developing 2,235lb of thrust each.
Max Speed
628 mph
(1,010 kph | 545 kts)
Ceiling
45,932 ft
(14,000 m | 9 mi)
Range
621 mi
(1,000 km | 1,852 nm)
Rate-of-Climb
3,600 ft/min
(1,097 m/min)


♦ MACH Regime (Sonic)
Sub
Trans
Super
Hyper
HiHyper
ReEntry
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030


(Showcased performance specifications pertain to the Heinkel He P.1073 production variant. Compare this aircraft entry against any other in our database. View aircraft by powerplant type)
PROPOSED:
3 x 20mm MG151/20 automatic cannons OR 2 x 30mm MK108 automatic cannons in the nose assembly.


Supported Types


Graphical image of an aircraft automatic cannon


(Not all ordnance types may be represented in the showcase above)
Hardpoint Mountings: 0


P.1073 - Base Project Designation.
P.1073.01.4 - Original design arrangement with highly-swept-back wing mainplanes and V-tail formation.
P.1073.01.8 - Proposed model for the high-speed, high-altitude reconnaissance role; revised high aspect ratio wing mainplanes (unswept) considered.
P.1073.02 - Proposed model with forward-swept wing mainplanes.


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