hesham

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Training plane Project. Poland,

The design of the ST-4 training aircraft was developed for a competition announced by IBTL in June 1926 for a training aircraft capable of performing full acrobatics. The plane took second place in the competition, the project Bartel BM-3 won, and PWS-2 took third place.

The constructors were Eng. Piotr Tułacz and August Zdaniewski from WWS "Airplane". In the opinion of IBTL, it was noted that the project requires major modifications, including displacement of the longitudinal mass distribution in the hull and increase of the hull length. The project sent for correction was not implemented.

 

Apophenia

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The designers, of course, came from WWS Samolot S.A. In 1926, one of those designers' names was inż. August Bobek - he didn't change his name to Zdaniewski until 1932.

BTW, the IBTL in question was the Polish Army's Instytut Badań Technicznych Lotnictwa (Aviation Technical Research Institute) of Warsaw
 

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School plane Project. Poland,

The project of the "Orle" school plane was developed by Eng.
Maurycy Sztygold for a competition announced in October 1924
by the IV Department of Air Navigation for the design of the airframe.
The results were announced on November 16, 1925. He took second
place in the general classification and second prize. It was intended f
or initial pilot training.

The design and calculations are carefully and clearly made, and the
construction is not very complicated. Despite the high rating (second
place after WZ-IX) and the announcement of building a prototype,
the project was not implemented.

 

Apophenia

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BTW, Orlę means 'Eaglet'. The rest of the samolotypolskie.pl text reads:

Construction :
Two-seater monoplane with wooden structure.
Side-by-side seating in cockpit for instructor and student

Engine - 26 kW (35 hp) Anzani
 

hesham

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Helicopter Project. Poland,

During the occupation, Stefan Waciórski worked in the underground
Institute of Aviation. He then developed a helicopter design, which he
named "Ciocia Felcia". Every aunt - as he claimed - could fly on it for
home shopping.

 

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Reconnaissance plane Project. Poland,

The design of the Wentzel-I plane was created in 1919 by Włodzimierz
Wentzl. The constructors were Włodzimierz Wentzel and Emil Kurzeja.
In November 1919, Wentzel made an offer to SŻN, proposing to launch
the production of aircraft. A committee was delegated to the manufacturer
to familiarize themselves with the design of the aircraft and the production capabilities. The company declared the delivery of the first aircraft five
months after signing the contract, 450 airframes in the first year and 1,200
per year in the following years.

After getting to know the label, the commission was skeptical about the
offer. The feasibility of producing aircraft was not recognized. The offer
was rejected.

 

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Project of an amateur sport plane. Poland,

The design of the WK-2 aircraft was developed by Władysław Kozłowski
in 1927. The project was not implemented.

Construction:
A small single-seat biplane.

Technical data of WK-2 :
Spans - 5 m.

 

VictorXL188

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A question: does any Polish engineer in 1920-1930s experimented with remote controlled planes/bombs? I'm working on a series of articles about guided weapon experiments in minor WW2 participants (like Hungary and Romania), and neutral countries (like Sweden) and would be grateful for any data.
If you look at answer#5 it mentions the Paul Schweda unmanned design.
 

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Fighter plane Project. Poland,

The design of the "Wujot" fighter plane was prepared for a
competition announced in October 1924 by the IV Department
of Air Navigation for the design of the airframe. The results were
announced on November 16, 1925. The project was prepared by
Jerzy Wojciechowski from the Polish Aviation Youth Association.
The project got 2nd place in the group of single-seat fighters, 6th
place in the general classification and 4th prize.

The project was not implemented.

 

hesham

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Experimental plane Project. Poland,Strange concept

Capt. Eng. Jan Wołowski developed in 1922 at the Military Central Aviation Research Center a project of an automatically stabilized aircraft . He applied for a patent for an automatic airframe ballast in the Polish Patent Office . In September of the same year, in the workshop of the Central Aviation Works in Mokotów, he completed a 1:10 scale model, which he tested in the wind tunnel of the Warsaw University of Technology . The construction of the aircraft was started in 1923, but already in 1924 it was definitely abandoned. The plane was never completed A reminiscence of the inventor's interest in the automatic stabilizer was his participation in the Exhibition of Aircraft Models and Aerofoto, which was organized in April 1924 by the State Air Defense League in Warsaw. Wołowski exhibited an experimental model of an airplane with an articulated airfoil above the fuselage. In the case of tilting of the aircraft, the upper wing moved towards the fuselage, which was to ensure automatic lateral stability of the apparatus in flight. Perhaps he continued his experiences and works related to the construction of an aircraft of his own design in RBWZ, abandoned in 1911 (see Wołowski-Piotrowski reflex plane ). Wołowski's model aroused keen interest in both the public and the press. The inventor argued that he would soon perform a series of experiments on the stand prepared on the roof of a freight car included in the fast train, and his method of ensuring automatic lateral stability of airframes may be of great importance for heavy transport and bomber aircraft.

 

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hesham

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Experimental helicopter project. Poland.

On July 5, 1924, Jan Wołowski applied for a patent for a "friction drive helicopter". Wołowski pointed out that the use of a complex system of gears in the helicopter between the engine and a low-speed rotor with a large span carries a heavy load on the machine and is difficult to implement. Belt transmissions also did not win recognition, due to the fact that the belts working in the horizontal plane cannot protect themselves from damage and sliding, as well as from jumping off the rim of the drive pulley.
He proposed the use in a two-rotor helicopter with concave profile rotors, mounted coaxially, of an appropriate friction gear configuration with the rotor, suspended in a place as close as possible to the center of gravity of the system, which, in his opinion, should provide a sufficient degree of efficiency of the power transmission, the large pulley would also constitute a crown rotor hubs, while the small ones would be connected to the thrust mechanism.

 

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hesham

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Bomber. Poland / France,

W-6 & W-7;

Edward Wróblewski, after abandoning the construction of a twin-prop aircraft (see Wróblewski (Edward) two-propeller aircraft), fundamentally changed the assumptions and layout of the aircraft that he intended to dedicate to the army. He abandoned the concept of a monoplane in favor of a biplane, twin engine, with engines mounted on the wing.

The W-6, which was to be a medium bomber, was built in the workshop of Louis Joannard in Lyon from mid-1915. In order to obtain two Hispano Suiza engines for this construction, he sought interest in the project by the military authorities. After many different interventions, also from the politicians he reached, he received steel pipes rationed during the war, thanks to which in February 1916 the W-6 type A military plane was already fully assembled. The designer asked Edouard Nieuport to allow him to purchase Hispano-Suiza V8 engines with 147 kW (200 HP), produced at his factory in Issy-les-Moulineaux. However, on March 9, 1916, he refused. During the war, the priority was given to production for military aviation, studies and design experiments lagged far behind the needs of the front. In this case, the issue concerned engines, the production of which did not fully meet the needs of building new aircraft and operating those used in the first line. There was even talk of motor hunger. No wonder that this barrier could not be broken.

This plane was to be equipped with a bomb launcher and a bomb sight, which was necessary to attract any interest of the military authorities, which clearly defined the technical guidelines for a bomber plane, which had to have instruments enabling a precise raid over the target. To meet this condition, Edward developed his own type of bomb sight, which he referred to as a teleperiscope or optical apparatus for airplanes. On 4 April 1916 he applied for a patent, but we do not know this patent, it was not published due to its military value. He also sent a description of his invention to the Ministry of War. Here, Pierre-Étienne Flandin, aeronautics rapporteur on the Armed Forces Control Commission of the National Assembly of France opted for its implementation and appropriate experiments. The case of Edward Wróblewski's sight to the French Ministry of War was also recommended above by Alain Leret d'Aubigny, a politician. Their interventions made the military authorities finally become interested in the proposal and ordered that on July 10, 1916, tests with the completed specimen were carried out in Ambérieu, led by Lieutenant Colonel Jean Doran.

At that time, as a result of a recommendation from Louis Janin, Wróblewski's works became interested in the aviation pioneer and industrialist Robert Esnault-Pelterie, who in 1915 moved his aviation factory to Lyon. The advocate of Edward's design work was Michel Pierre Molla, director of the Lyon airline company REP.

On March 16, 1916, he offered Edward all the help and services of a factory pilot who would carry out a flight test of the machine. Robert Esnault Pelterie finally made Nieuporta provide the engines necessary for test flights. On April 18 in Issy-les-Moulineaux, at the Nieuporta airport, where the final assembly of the plane transported here from Ambérieu was carried out. With the participation of officers of the Aeronautics Department of the Ministry of War, military tests of the plane were undertaken in flight, up to a ceiling of 4,000 m. Unfortunately, in the first flight there was a failure and the plane fell into the Seine. The pilot and accompanying Edward, the wounded were taken out of the river. The idea of rebuilding the W-6 was abandoned.

After the crash of the Wróblewski W-6 bomber, during a long recovery, Edward Wróblewski developed a project to build a heavy, D-type biplane W-7 bomber with strong on-board armament, according to the guidelines of the Ministry of War regarding technical requirements for strategic military aircraft.

 

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riggerrob

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Experimental helicopter project. Poland.

On July 5, 1924, Jan Wołowski applied for a patent for a "friction drive helicopter". Wołowski pointed out that the use of a complex system of gears in the helicopter between the engine and a low-speed rotor with a large span carries a heavy load on the machine and is difficult to implement. Belt transmissions also did not win recognition, due to the fact that the belts working in the horizontal plane cannot protect themselves from damage and sliding, as well as from jumping off the rim of the drive pulley.
He proposed the use in a two-rotor helicopter with concave profile rotors, mounted coaxially, of an appropriate friction gear configuration with the rotor, suspended in a place as close as possible to the center of gravity of the system, which, in his opinion, should provide a sufficient degree of efficiency of the power transmission, the large pulley would also constitute a crown rotor hubs, while the small ones would be connected to the thrust mechanism.


Hah!
Hah!
That reminds us of R. Buckminster Fuller's 1930 Dymaxion House.
 

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hesham

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Experimental plane Project. Poland,Strange concept

Capt. Eng. Jan Wołowski developed in 1922 at the Military Central Aviation Research Center a project of an automatically stabilized aircraft . He applied for a patent for an automatic airframe ballast in the Polish Patent Office . In September of the same year, in the workshop of the Central Aviation Works in Mokotów, he completed a 1:10 scale model, which he tested in the wind tunnel of the Warsaw University of Technology . The construction of the aircraft was started in 1923, but already in 1924 it was definitely abandoned. The plane was never completed A reminiscence of the inventor's interest in the automatic stabilizer was his participation in the Exhibition of Aircraft Models and Aerofoto, which was organized in April 1924 by the State Air Defense League in Warsaw. Wołowski exhibited an experimental model of an airplane with an articulated airfoil above the fuselage. In the case of tilting of the aircraft, the upper wing moved towards the fuselage, which was to ensure automatic lateral stability of the apparatus in flight. Perhaps he continued his experiences and works related to the construction of an aircraft of his own design in RBWZ, abandoned in 1911 (see Wołowski-Piotrowski reflex plane ). Wołowski's model aroused keen interest in both the public and the press. The inventor argued that he would soon perform a series of experiments on the stand prepared on the roof of a freight car included in the fast train, and his method of ensuring automatic lateral stability of airframes may be of great importance for heavy transport and bomber aircraft.


Also from the same source.
 

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riggerrob

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Hi,

Mr. Jerzy Dabrowski designed the D-1 Cykacz,it was single seat cantilever sporting biplane,built
in 1925 and powered by one 16 hp Blackburn Tomtit engine,followed by D-2,it was a single seat
high-wing monoplane Project of 1926,but never materialized.


Cute little biplane.
Those flat wings would have neutral roll stability: great for aerobatics, but tiresome in cruise.
 

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