The E-75 was an experimental German heavy tank from the Second World War that never entered mass production. It was probably armed with the KwK 43 L / 71 or L / 100 88 mm cannon or the 105 mm long-range cannon and 1 or 2 machine guns MG34 cal. 7.92 mm.
Design work on the E-75 tank was initiated in as part of the Entwicklungsserie program, i.e. a program for the development of German armor, which was to lead to the creation of a standardized design for a series of six combat vehicles of different weights, but using as many common components as possible. Analytical and conceptual work under this program was initiated in mid-1943. The E-75 tank in this project was to be a new heavy tank of the German army, in which particular emphasis was placed on possibly thick armor and the greatest possible ability to fight enemy armored vehicles. Most likely, the vehicle was to use an appropriately rebuilt and redesigned Schmallturm turret and - most likely - the hull and chassis of the Pz.Kpfw VI Tiger II, which it was to eventually replace in the line.
The Rheintochter (German daughter of the Renu) was a German, experimental, surface-to-air guided missile of the Second World War. The Rheintochter was a two-stage missile with a range from 16,000 meters capable of carrying a warhead weighing up to 22-24 kilograms.
The first works on the Rheintochter began in 1941 at the Rheinmetall-Borsig company, but the first copies of the missile were not ready until the fall of 1943. The Rheintochter was to constitute the equipment of anti-aircraft units and - from 1943 - to fight the Allied bomb expeditions over Germany. The missile was to be as effective as possible, which meant the use of radio-wave guidance. In total, three versions of the Rheintochter missile were created. The first one, marked as R1, did not reach the speed of sound and in fact was used primarily for experiments with the steering system and general aerodynamic assumptions of the projectile. Very similar to the R1 version was the R2 version which, however, proved to be highly unsuccessful and was abandoned in 1944. The final version was the Rheintochter R3 missile in which the propulsion system and the location of the warhead were changed. This resulted in a significant improvement in performance, but the power unit turned out to be extremely emergency, which made it impossible to introduce the system into the line. Finally, the Rheintochter program was canceled in February 1945. Probably about 50 missiles of this type were created, which were used only for tests and experiments.