Turbojet technology was in its extreme infancy by the time of World War 2 (1939-1945) but it would soon be used to change the fortunes of many world powers moving forward. The Germans were able to make a great-many-strides with their development-minded, private venture Heinkel He 178 (detailed elsewhere on this site), the product becoming the world's first aircraft to fly solely under turbojet power. From this work, the company was able to further a more advanced monoplane form in the He 280 - the world's first aircraft to be designed from the outset as a military fighter.
The earlier He 178 was able to record a first-flight back on August 27th, 1939. The aircraft utilized a well-streamlined form with the cockpit at front, shoulder-mounted wings at midships, and a traditional single-finned tail unit. A tail-dragger undercarriage was featured for ground-running and the single HeS 3 series turbojet, offering 992lb of output thrust, was aspirated through the cut-off nose section. The framework for the He 280 was all but set now.
The newer aircraft was worked on into 1940 just as the war in Europe was entering critical stages for the Allies and Germany alike. Again, its development centered on a private venture initiative by the Heinkel concern as German authorities were not too interested in the investment for the moment - the war had, up to this point, "gone their way" more or less. The He 280 project was born back in late-1939 as "He 180" and headed by one Robert Lusser. The HeS 8 series turbojet (1,543lb of thrust output) was selected to power the new form.
The aircraft was given a streamlined fuselage, this time with a covered nosecone section. The cockpit was situated further back in the design but ahead of midships nonetheless. The wing mainplanes were mid-mounted and straight with rounded trailing edges. Unlike the He 178, the engine mountings were now slung under the wing mainplanes and two engines would be used to power the type - a necessity considering the relatively low power output of early turbojets. The tail unit was also rewritten with twin-vertical fins straddling the horizontal planes. For ground-running, a more modern tricycle gear arrangement was used - all three legs made retractable into the design.
The aircraft was being finalized in the middle of 1940 but its first-flight delayed some due to technical issues surrounding the HeS 8 turbojet. On September 22nd, 1940, the aircraft nevertheless went into the air in what was essentially a glider form. Its first turbojet-powered flight would have to wait until March 30th, 1941, realized through prototype He 280 V1. During this action the engines were uncowled for easy access to vital components. It was showcased to German authorities on April 5th, 1941 but, again, little serious interest in the project was had.
He 280 V2 and He 280 V3 were a pair of early-form aircraft with the latter being readied into 1943 with some revisions to boot - particularly concerning the troublesome HeS 8 engine. The former would eventually be re-engined with the Junkers Jumo 109-004 turbojet engine at some point. That December, the He 280 V3 was showcased to German authorities, again, in a mock dogfight involving Germany's best fighter of the war - the classic Focke-Wulf Fw 190 single-engine, piston-driven monoplane.
It was this showing that finally convinced the German hierarchy to invest in the jet fighter program and led to a contract for twenty pre-production forms to iron out deficiencies in the design at the operational level. Once successful, a further three-hundred fighters would be ordered from Heinkel. To this point, it was known that the He 280 design carried weaknesses in its tail design (leading to cases of tail "flutter" in flight) and its tricycle undercarriage was weak on anything but prepared runways. Armament provision was limited and fuel stores restricted operating ranges no thanks to the dual turbojet arrangement which proved fuel-thirsty.
The He 280 V4 followed with BMW 109-003 turbojet engines before being reworked to accept six Argus 109-014 pulsejet engines. The He 280 V5 was completed with HeS 8 engines before being graduated to BMW 109-003 engines. V5 also incorporated 3 x 20mm MG151 autocannons as standard armament. He 280 V6 followed with the same forward-facing, fixed battery. He 280 V7 was completed with BMW 109-004 turbojet engines and relegated to high-speed testing for its service life. He 280 carried BMW 109-004 turbojets but included a V-style tailplane arrangement to differentiate it from earlier He 280 marks. The final prototype, He 280 V9, was powered by BMW 109-003 engines.
The German Air Ministry eventually forced airplane makers towards the newer, more advanced HeS 011 series turbojet engine due to ongoing issues with the HeS8 and HeS 30 turbojet models. However, the advanced nature of this new engine was equally problematic for engineers. This is where pulsejets allowed at least some further development to take place regarding the He 280 prototypes. Similarly, the BMW 003 and Junker Jump 004 turbojets were options.
Note: The above text is EXCLUSIVE to the site www.MilitaryFactory.com. It is the product of many hours of research and work made possible with the help of contributors, veterans, insiders, and topic specialists. If you happen upon this text anywhere else on the internet or in print, please let us know at MilitaryFactory AT gmail DOT com so that we may take appropriate action against the offender / offending site and continue to protect this original work.
He 280 V1 - Initial Prototype Form; fitted with HeS 8 (109-001) powerplants.
He 280 V2 - Prototype; fitted with HeS 8 engines.
He 280 V3 - Prototype; fitted with HeS 8 engines; later refitted for Jumo 109-004 turbojets.
He 280 V4 - Prototype; fitted with BMW 109-003 engines; later fitted with 6 x Argus 109-014 pulsejets.
He 280 V5 - Prototype; at first fitted with HeS 8 engines; later fitted with 109-003 engines; 3 x MG 151 20mm cannons.
He 280 V6 - Prototype; fitted with 3 x 20mm cannons.
He 280 V7 - Prototype; Fitted with 109-004 engines; later relegated to high-speed glider aerodynamic research platform.
He 280 V8 - "V"-type tail assembly; fitted with 109-004 engines.
He 280 V9 - Fitted with 109-003 engines.
Values are derrived from a variety of categories related to the design, overall function, and historical influence of this aircraft in aviation history.
The overall rating takes into account over 60 individual factors related to this aircraft entry.
Rating is out of a possible 100 points.
Relative Maximum Speed
This entry's maximum listed speed (559mph).
Graph average of 563 miles-per-hour.
Operational range when compared to distances between major cities (in KM).
Max Altitude Visualization
The three qualities reflected above are altitude, speed, and range.
Aviation Era Span
Showcasing era cross-over of this aircraft design.
Unit Production (9)
Compared against Ilyushin IL-2 (military) and Cessna 172 (civilian).
The "Military Factory" name and MilitaryFactory.com logo are registered ® U.S. trademarks protected by all applicable domestic and international intellectual property laws. All written content, illustrations, and photography are unique to this website (unless where indicated) and not for reuse/reproduction in any form. Material presented throughout this website is for historical and entertainment value only and should not to be construed as usable for hardware restoration, maintenance, or general operation. We do not sell any of the items showcased on this site. Please direct all other inquiries to militaryfactory AT gmail.com. No A.I. was used in the generation of this content; site is 100% curated by humans.