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The construction of the HP-3 monoplane has just been completed in Dresden, begun in August 1921. This gliding device is the work of H. Pobel, a student at the Dresden University of Technology. It will be tested in the Erzgebirge, near the Czecho-Slovakian border, before being presented in the Rhön.
The HP-3 is a monoplane with a cantilevered wing and is reminiscent of the Aachen gliding aircraft, which were themselves inspired by the Junkers.
The thick wing is in Lilienthal profile.This wing is in two parts, to facilitate its disassembly and transport, while the Aachen wings are in one piece. The wing is attached to the fuselage by two spars. Lateral stability is achieved by warping. The complete wing weighs 32 kg, or 1.88 kg per square metre.
The fuselage consists of two parts: the front which includes the landing gear, the pilot's seat, in the center, and a tapered part with the rear skid; The rear forms the tail of the aircraft. This division was borrowed from the Aachen aircraft for ease of transport.
The front of the fuselage is very high, so that only the pilot's head is exposed to the air current. The landing gear is made up of two profiled trousers, with two elastic parts still suspended from rubber bands. This landing gear is reminiscent of that of the Aachen, but instead of being under the wings, the pants are placed under the fuselage. The central part of the fuselage is 3.93 m long, 1.80 m high and weighs 48 kg.
The tail is formed by the rear part of the fuselage with all the stabilizing and steering organs. The rudders and elevators are flexible, in order to eliminate mechanical parts, hinges, etc., and to obtain a better performance of moving surfaces.
The full tail weighs 10.5 kg.
This aircraft, built in 10 months privately by five students and mechanics, should not be confused with the new Dresden 1922 aircraft, which is of a different design.