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Villard helicopter

1912

 

villard_1.jpg

 

In 1913 Henry Villard, who had previously performed some direct lift experiments in France, carried out various trials in a balloon hangar near Brussels with an aircraft which he had designed. It was a lifting device 2.7 metres in diameter, driven directly by a 100hp type 1912 Anzani engine. The device weighed 400 kilos, and during its tests the rear wheels left the ground.

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Rotorway Javelin

1961

 

rotorway_javelin_1.jpg

 

In 1958, B.J. Schramm set up a company to market a single-seat amateur-built helicopter known as the Schramm Javelin. This machine had a tubular steel structure with a formed aluminium body shell and was powered by a 100hp Mercury powerboat engine. It first flew in August 1965. Schramm subsequently redesigned the Javelin as the "Scorpion", and he formed Rotorway Aircraft Inc. to market kits for this revised version, and claimed that 250 were flying by 1970.

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Piasecki PV-3 / HRP "Rescuer"

1945

 

piasecki_pv-3.jpg

 

Although it was built only in modest numbers and had an unspectacular (though useful) service career, the Piasecki HRP-1 has its place in the history of rotorcraft by virtue of being the world's first practical tandem-rotor helicopter and, at the time of its appearance, the world's largest helicopter of any kind. Frank N. Piasecki, holder of the first helicopter pilot's licence to be issued in the United States, became interested in rotorcraft development before America's entry into World War 2, and in 1943 he formed a company known as the P.V. Engineering Forum whose first design, the PV-2, was a single-seat, single main rotor helicopter with a 90hp Franklin engine. This machine, which flew for the first time on 11 April 1943, was Piasecki's first and only single-rotor helicopter, for on 1 February 1944 he received a contract to develop a tandem-rotor utility transport and rescue aircraft for the U.S. Navy.

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Ospite iscandar

DLHD3075-12-1-P.jpg

 

Three Do Xs were constructed in total: the original operated by Dornier, and two other machines based on orders from Italy - the X2 (named Umberto Maddalena) and X3 (named Alessandro Guidoni). The Italian variants were essentially identical to the original with the exception of the powerplant and engine mounts. Each craft was powered by Fiat A-22R V12 water-cooled engines, with the six motor mounts being covered by a streamlined fairing. The Do X2 entered service in August, 1931, and the X3 followed in May, 1932. Both ships were based at the seaplane station at La Spezia, on the Ligurian Sea.

 

 

Italy's Do X3 Alessandro Guidoni, one of the three Do X's built.Both orders originated with SANA, then the Italian state airline, but the aircraft were requisitioned and used by the Italian Air Force primarily for prestige flights and public spectacles. After plans for a first-class passenger service (Genoa-Gibraltar) were deemed unfeasible, the X2 and X3 may have been used for training and transport flights (one rumor has it that a Do X even ferried troops to Ethiopia in February, 1935). No evidence exists of their fate; presumably they were quietly broken up for scrap around 1935.

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Baumgartl Heliofly III-59

1943

 

baumgartl_heliofly-359.jpg

 

Resulting from previous work was a design in 1942 for a strap-on helicopter. This was the Heliofly III-57, which had a rotor consisting of two co-axial contea-rotating single blades, each of which was to be driven by its own 8 hp Argus As 8 engine, which also acted as a counter-balance. When it became apparent that the Argus engines could not be readily obtained, the helicopter was redesigned in 1943 as the Heliofly III-59 to be powered by a single 16 hp engine. In this design, the engine drove and counterbalanced the lower blade and, through gearing, also drove the upper blade, so that torque was still counterbalanced by contra-rotation. A weight, instead of an engine, counterbalanced the upper blade, and the flapping rotor system had cyclic pitch control.

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Ospite intruder
Sikorsky R-5 / HO2S

1943

 

sik_r-5.jpg

 

Cos'ha di brutto o di strano? Mettiamo anche questo, allora:

 

ch47_chinook_2.jpg

Modificato da intruder
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che ha di strano o curioso?? all'epoca gli elicotteri erano così...

 

Se vogliamo vedere il 60% dei modelli di aeromobli postati, tenendo conto del periodo di riferimento, è ovvio che non hanno nulla di particolare, solo agli occhi "odierni" presentano delle caratteristiche "Curiose"

 

Mettete questo topic negli offtopic, dove i post non fanno punteggio, nessuno ci postera' piu'

 

Mi Dici cosa c'entra con il topic, per le lamentele o i problemi esistono i pm, o i topic appositi, quindi il commento è totalmente fuori luogo, di conseguenza vediamo di non far degenerare il topic!

Modificato da Blue Sky
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