POWER PLANT: Two Junkers Jumo 004C turbojet engines, rated at 1.100 kp each
PERFORMANCE: 600 mph at 40,000 ft
COMMENT: The Horten/Gotha Go 229B-1 was a night- and all-weather fighter variant of the basic Horten/ Gotha- Go 229A-0. The design based on the projected Horten Ho 229B V-7. Again the fuselage was lengthened to accommodate two crew members in tandem and FuG 240 Berlin radar. The flight characteristics were unchanged compared with the Horten/Gotha Go 229A-0. The project never left the drawing board.
ACCOMMODATION: None. Pilot only in Heinkel He 162 A-1
POWER PLANT: Two BMW 003A-1 turbojet engines, rated at 800 kp each
PERFORMANCE: No data available
COMMENT: This “Mistel 5” project was designed as a simple glide bomb that would be powered by two turbojet engines (version B) and carried in pick-a-pack combination beneath a Heinkel He 162 “Spatz” interceptor. Since the single turbojet engine of the He 162 would not have been powerful enough to carry the heavy “Mistel 5” composition two BMW turbojet engines were mounted under the wings of the Arado Ar E. 377. This version was known as Arado Ar E.377B and was similar in all other aspects to the unpowered glide bomb Arado Ar E.377A.
Take-off of the “Mistel 5” composition was accomplished by means of a releasable trolley, sometimes additionally boosted by two Walter HWK 109-500 take-off rockets. The trolley was similar to the one that Rheinmetall-Borsig had designed for the Arado Ar 234A “Blitz” bomber and reconnaissance versions. Since the “Mistel 5” composition was heavier an extra set of wheels were added to the new trolley. Once the composition reached take-off speed the trolley was released and slowed-down by means of one to five parachutes.
A piloted version was also planned as suicide weapon but not realized. The Arado Ar E.377, neither version A nor version B, ever reached prototype status (Ref.: 17).
POWER PLANT: Two BMW 003 turbojet engines, rated at 900 kp each
PERFORMANCE: 553 mph at 16,405 ft
COMMENT: This Blohm & Voss dive bomber and ground attack aircraft project of 1944 was of a twin boom design with each boom having a bomb bay in the forward section capable of holding a SC 250 bomb. The aircraft was powered by two BMW 003 turbojet engines mounted side-by-side under the center nacelle in which the cockpit and armament was located. The heavy armament consisted of four fuselage mounted MG 151/20 20mm cannon. The landing gear was a conventional “tail-dragger” arrangement with extended track width. Although detail planning was in advanced stage the project was not favored by the “Technische Amt” (Technical bureau) of the RLM (Ref.: 17).
TYPE: Anti-ship and -fortification explosive filled glide bomb as “Mistel” composition. Project
ACCOMMODATION: Pilot only in Arado Ar 234C-3
POWER PLANT: None with glide bomb, two BMW 003A turbojet engines with Arado Ar 234C-2, rated at 850 kp each
PERFORMANCE: Data not available
COMMENT: This “Mistel 5” project was one of the last glide bomb developments submitted to the RLM before the end of WW II. Arado, working with Rheinmetall-Borsig, designed a simple glide bomb that would be powered (version B) or unpowered (version A) and carried beneath the Arado 234 “Blitz” bomber or Heinkel He 162 “Spatz” interceptor. The purpose of this glide bomb, which could be guided by radio control or a target guidance system, was to attack targets such as ships or military facilities.
construction of the Arado Ar E.377 was wooden throughout the entire aircraft. The fuselage was circular in cross section and was cigar shaped. The nose held 2,000 kg of high explosive especially suitable for ship attacks. In addition 500 kg of an incendiary liquid was stored in the rear fuselage which also acted as ballast to counterbalance the forward warhead. The wings were tapered and shoulder mounted. They also served as auxiliary fuel tanks for the guide aircraft. A cruciform tail unit was mounted at the rear of the fuselage. For take-off the “Mistel 5” composition was set on a releasable trolley, developed by Rheinmetal-Borsig.
Upon arrival of the target the E.377 glide bomb was released by means of explosive bolts and flew to the target by means of a radio-control (Ref.:17).
POWER PLANT: One Walter HWK 509C liquid-fuel rocket engine, rated at 2,400 kp thrust (main chamber: 2,000 kp thrust, auxiliary chamber 400 kp thrust)
PERFORMANCE: 569 mph (estimated)
COMMENT: In 1944 the Arado design team proposed two liquid-rocket engines powered reconnaissance versions of the Arado Ar 234 “Blitz” (Lightning) high-speed bomber. The Arado Ar 234R, as it was designated, would consist of a regular Ar 234C frame but without turbojet engines. Instead two pods were installed under the wing, each containing a Walter HWK 109-509A bi-fuel rocket engine (project Ar 234R-1A). The second project Ar 234R-1B was to be powered by a Walter HWK 109-509C two chamber liquid-fuel rocket engine mounted in the rear section. Therefore a cowling would have been installed in the rear fuselage underneath the rudder. The upper rocket engine called “Steigofen” (Accelerate chamber) delivered 2,000 kp and was to be used for climbing to altitude while the lower rocket engine, “Marschofen” (Cruising chamber) delivered 400 kp thrust and was used to power the aircraft during horizontal flight. During return flight – over a distance of more than 155 miles – the aircraft flew as a glider without power. The wing had a laminar profile with its maximal thickness at 50 to 60% chord. The glide ratio was calculated to 1:14.
Because of the limited fuel capacity and short endurance of the rocket engines the Ar 234R-1b was to be towed by a Heinkel He 177 “Greif” heavy bomber. A possible reconnaissance mission in the London area was calculated as follows: After take-off from a Luftwaffe base near Paris the aircraft was towed to the operational altitude of app. 26,247 ft, reached near Calais. After release of towline with “Steigofen” at full throttle the aircraft was powered at a speed of app. 506 mph to an altitude of app. 55,775 ft. This height was reached in a few minutes app. near the coast of Dover. During horizontal flight intermittent ignition of the “Marschofen” accelerated the aircraft with 569 mph to the target (i. e. London). After photo mission the aircraft flew back to the coast of England at a speed of 541mph and the descent back to the home base was flown as a glider. The mission was estimated for 21 minutes.
Although the Arado Ar 234R-1B project was promising it was abandoned in favor of the DFS 228 reconnaissance rocket-driven glider giving even better ceiling of 75,460 ft (Ref: 16).
TYPE: Anti-ship and -fortification destroyer Messerschmitt Me 262A-1a missile. Project
ACCOMMODATION: Crew of two in Messerschmitt Me 262A-2a/U-2 only
POWER PLANT: Two Junkers Jumo 004B turbojet engines each aircraft, rated at 950 kp thrust each
PERFORMANCE: No data available
COMMENT: In the last stage of WW II in Europe the RLM made great effort to deploy a great variety of composite aircraft (“Misteln”, “Mistletoes”) against enemy ground installations, troop concentrations, harbor facilities, bridges, ships, etc. and even bomber formations. In most cases elder or not for service qualified aircraft were used as un-manned, lower bomber compartment but also reconstruction of existing aircraft or complete new constructions – most made of non-strategical materials like wood etc. – were proposed. The bomber compartment was filled with explosives and guided to the vicinity of its target by a single seat fighter temporarily attached to a superstructure above the fuselage.
One of the extraordinary proposals was the combination of a Messerschmitt Me 262A-1a or Me 262A-2a/U2 as guide aircraft to an un-manned Messerschmitt Me 262A-1 as guided bomb. The cockpit canopy was faired over and all equipment stripped down to only those needed to keep the bomb flying. Nose of the aircraft was filled with explosive as well as two additional tanks setup in the fuselage. Three bomb load versions were proposed: Model A. Armored nose of the fuselage and additional tanks filled with 4,460 kg of liquid explosive, Model B: Armored nose formed of solid explosive, additional tanks filled with blocks of solid explosive, total amount restricted and Model C: Armored nose formed of 2,450 kg solid explosive, additional tanks filled with 2,760 kg liquid explosive, total amount 5,210 kg.
The upper component of this “Mistel” composition – number of “Mistel” variant not clearly known – was a two-seater Messerschmitt Me 262A-2/U-2. Besides the pilot a second crew member was lying in prone position in a glazed nose section of the fuselage. He guided the bomb into the target by means of a television set “Tonne-Seedorf”. In the cone of the lower (bomb) compartment a television camera (“Tonne”) was installed and the radio operator had a television tube (“Seedorf”) with relative high resolution. By means of radio-control the missile was guided to the target.
The project was soon rejected. It became clear that a pilot of a Messerschmitt Me 262 had enough problems with his own machine and to handle two of these excentric aircraft together seemed to be impossible.
POWER PLANT: One Daimler-Benz DB 610 liquid-cooled engine, rated at 2,900 hp, driving two four-bladed pusher propellers
PERFORMANCE: 466 mph
COMMENT: In 194/42 the design team of Henschel Aircraft Company proposed an advanced project of a fast light bomber and ground attack aircraft. Power was provided by a single Daimler-Benz DB 610 engine that in fact consisted of two Daimler-Benz DB 605 liquid-cooled engines, joined side-by side. The engine drove two four-bladed pusher type propellers via an extension shaft. A similar design but powered by a Daimler-Benz DB 613 was the Henschel Hs P. 75 fighter and interceptor project. Both designs were radical in so far as a canard arrangement was proposed with elevators in front and the wing positioned to the rear. By that enough space was available to integrate the wide and bulky power unit. Furthermore, a large weapon bay in the in the forward fuselage was available. The disadvantage of this arrangement is the permanent shifting of the center of gravity. Vertical fins were located at the wingtips. Intensive work was done concerning the lay-out of the cockpit in order to give the two crew members an excellent view forward. In case of emergency the cabin could be blown up in order to prevent a collision with the eight-bladed propellers. Detailed construction was in an advanced stage when the RLM refused this project with the flimsy comment “… the pilots couldn’t acclimatize with a propeller in the back and the elevators in front”. So further work on this project was stopped (Ref.: 16, 17).
POWER PLANT: Four Heinkel/Hirth HeS 011 turbojet engines, rated at 1,300 kp each
PERFORMANCE: 565 mph
COMMENT: The Heinkel He 343 was a four-engine jet bomber project by Heinkel Aircraft Company in the last years of WW II. In 1944 a total of 20 of these aircraft were ordered. For shortening the development time and for re-use of existing parts, its general design was envisioned along the lines of an enlarged Arado Ar 234 “Blitz” (“Lightning”). For a choice of engines, the Junkers Jumo 004 and the Heinkel HeS 011 were planned. The DFS (Deutsche Forschungsinstitut für Segelflug), (German Research Institute for Gliding Flight) was involved in the project and created the project known as P.1068. By the end of 1944, work was nearly finished by the Heinkel engineers, with parts for the He 343 prototype aircraft either under construction or in a finished state, when the order was cancelled due to the “Jägernotprogramm (Emergency Fighter Program). Four versions were planned: the He 343A-1 bomber, the He 343A-2 reconnaissance aircraft, and the He 343A-3 and He 343B-1 “Zerstörer” (“Destroyer”) heavy fighters.
The Heinkel He 343A-1 was to be the bomber version. Depending on the engines used, the bomb load ranged between 2000 kg to 3000 kg, with 2000 kg to be carried internally, and 1000 kg to be carried externally. Trials were to be held with the Fritz X radio controlled bomb, which would have also added a third crew member. Defensive armament consisted of two fixed rear firing MG 151 20 mm cannon with 200 rounds each, which were mounted in the rear fuselage. None aircraft was completed. However, after WW II the Soviet Union utilized the design as the basis for the development of the Ilyushin Il-22, changing some of the parameters such as size and crew numbers. One prototype was built and flown. The results of the tests were used in development of the Ilyushin Il-28 (Ref: 24).
POWER PLANT: One Heinkel-Hirth HeS 011 turbojet engine, rated at 1,300 kp
PERFORMANCE: 599 mph
COMMENT: On February 1945 the Tank design team proposed a second design of the Focke-Wulf/Tank Ta 183 turbojet fighter although the RLM accepted the first design for production. The new aircraft was similar to the Ta 183 design, except the wings were swept back at 35 degrees and the cockpit was set farther aft. Also, the tail unit was of more conventional design, with a curvilinear sweep of the fuselage into the vertical tail. This seemed to be necessary because it was expected that the long vertical tail of Ta 183 led to vibrations. By that the horizontal tail planes were mounted lower at the end of the fuselage. As with many other projects al work was halted with the end of the WW II two months later (Ref.: 17).
POWER PLANT: One Daimler Benz DB 613 liquid-cooled engine, rated at 3,500 hp
PERFORMANCE: 491 mph
COMMENT: In early 1941 the OKL asked for a possible successor for the Messerschmitt Me 110 heavy fighter. Among others the Henschel Aircraft Company proposed a design of a futuristic and unusual configuration. This design, the Hs P.75, featured a tapered fuselage with slightly swept-back wings set back to the rear fuselage of the aircraft and a pair of slightly swept-back canards located on the nose. The widened fuselage housed a powerful engine that drove three-bladed contra-rotating pusher propellers at the rear via an extension shaft. As power unit a Daimler Benz DB 610 engine, which were two DB 605 liquid-cooled engines joined side-by-side, was proposed. These were the same engines that the Heinkel He 177 bomber used and became known for overheating and catching fire. So it was decided to install the Daimler Benz DB 613, in fact two coupled DB 603 liquid-cooled engines, rated at 3,500 hp. A vertical tail unit was mounted beneath the fuselage additionally functioning as a tail bumper and protected the propellers from stroking the ground during take-off. A tricycle landing gear arrangement was chosen and a single pilot sat in the cockpit located about midway along the fuselage. All weapons were mounted in the nose. The advantage of the pusher propeller and the forward canard design was the excellent view of the pilot and concentration of weapons in the nose. The disadvantage would be the engine cooling and the pilot’s safely exit in case of emergency. Although good results were obtained in wind tunnel testing this design was not followed up further.
Notable is the fact that this basic design was realized in several WW II aircraft design such as Curtiss XP-55 “Ascender” and Kyushu J7W1 “Shinden” (Ref.: 17).