Czechoslovakian helicopters, Prototypes & Projects

Matej

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Interesting projects from czech archives. In secod half of the 50s Ing. Jaroslav Schlechta started to materialize his idea about militarized version of light utility helicopter HC-3. First was HC-3A (OK-VZB) with M 360 RF engine (rebulit soviet AI 14 VF - 221 kW). It had on every side rocket system with unguided rockets: early time there were two three tubes systems with 130 mm rotary stabilised JRRO-130 rockets, later replaced by two sixteen tubes systems. Helicopter weighted 1520 kg, achieved maximal speed 168 km/h and was revealed in Warsaw pakt military exercise "Vltava" in 1966.

A few years later Richard Schon derived improved version HC-3B that differed with thinner fuselage, two seat cockpit (one after another), ski gear, aerodynamic cover of rotor head and on the bottom of the fuselage machine gun.

HC-4 originated in 1967 - 1971 era and was made by Jaroslav Tekl. It had two two-barrel machine guns in the front part. During targeting it was necessary to move the whole helicopter. Third gun was placed on circular hanger in the rear part and was able to fire backwards, down and to the sides.

HC-4B also from Jaroslav Tekl, dated in 1968. Attack/reccon helicopter, armed escort or CSAR. Fuselage was only 0,9 m thin, armour able to defend 8 mm bullets, first cockpit place for weapon officer, second for pilot. Equipped with M 601 H engine (405 kW), empty weight 1050 kg, useful load 950 kg (weapons 400 to 600 kg), rotor diameter 10,6 m, max. speed 240 km/h, range 200 - 400 km.
 

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Matej

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A bit modified HC-4B.

There was also armored attack variant of multipurpose VK-4 with M 601 H engine, but I have currently no information or picture of that.

XV-1 designed by Ing. Jan Kohoutek in 1971. Single-purpose attack helicopter with M 601 H engine (383 kW), two seat cockpit, three blade rotor diameter 10,6 m, max speed 260 km/h and rangefrom 500 - 1300 km.

Attack modification of Mi-1 from 1976 born in cooperation of Zdenek Pondelicek, Richard Schon and Ing. Ladislav Benes. Attack version of modernised czechoslovakian Mi-1 with domestic engine placed just behind the pilot, with lower weight, smaller height and rocket launchers on both sides of the fuselage.
 

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rousseau

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Very interesting! This layout fitting the engine behind the cockpit on Helicopter looks much superiorer than fitting the engine in nose as British Helicopter! Czech did good job!
 

Justo Miranda

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Unknown source
 

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airman

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L-16 project remember me russian Mil-2,last three projects french helicopters like Alouette III or Gazelle
 

Just call me Ray

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Very interesting and appreciated, looks like they focused on flying cranes for quite a while.
 

Petrus

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If you are interested in Czechoslovak helicopter projects you should take a look at a Czech website http://www.vrtulnik.cz, where you'll find more info (in the Czech language, really easy to understand as it's quite similar to Polish ;) ;D...) on the development of the Czechoslovak helicopters.
As for the HC-4, there are two webpages http://www.vrtulnik.cz/hc-4.htm and http://www.vrtulnik.cz/orlican.htm devoted to the project. They contain quite a lot of information as well as some drawings and photos of the HC-4's mock-up.

E.g.:
helo696.JPG

helo697.JPG

helo1256.JPG


The HC-7 project does have its own website too. Its address is http://www.aviastar.org/helicopters_eng/czech_hc-7.php.

Best regards,
Piotr
 

Stargazer2006

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  • HC-4 mockup
  • Evolution of the HC-4 design
  • HC-3A project
  • Various HC-3/HC-4 related designs
  • XV-1 project
Enjoy!
 

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hesham

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Hi,


here is the HC-5 2,L-16 early design and HC-203 projects,also some info
about HC-102;


http://www.vrtulnik.cz/
 

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Pioneer

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Very, very interesting!!
The poor Czech's have always been excellent and talented designer's in the relative short period of time they have been around! Unfortunately, history and world events doesn't seem to want them to prosper :mad: - German occupation, Soviet occupation and then the country's break-up ............. ???
I often wonder where Czechoslovakia might be today in terms of civil and military designs, manufacturing and exporting, if these two dramatic events never happened

Regards
Pioneer
 

hesham

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Pioneer said:
Very, very interesting!!
The poor Czech's have always been excellent and talented designer's in the relative short period of time they have been around! Unfortunately, history and world events doesn't seem to want them to prosper :mad: - German occupation, Soviet occupation and then the country's break-up ............. ???
I often wonder where Czechoslovakia might be today in terms of civil and military designs, manufacturing and exporting, if these two dramatic events never happened

Regards
Pioneer


My dear Pioneer,


in early 1980s,my father went to many contries,and saw a large basis of industry,and exceeded on any east
Europe countries by that time.
 

bigvlada

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They had the industrial heritage, being the largest manufacturing region of Austro-Hungarian empire. Kingdom of Yugoslavia bought a lion's share of it's armament from the Czechs and they in return bought raw materials from the Balkans. Both were part of little Antante, with Romania. Their craftsmanship was held in high esteem in Yugoslavia.
 

hesham

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The HC-202;

http://www.vrtulnik.cz/helo675.JPG
http://kulturserver-nds.de/home/hubtest/medien/Typenkartei3953xGUN7x9T3Z7.pdf
 

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hesham

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From L+K 12-13/1976,

here is a drawings to HC-102,HC-202,HC-4,HC-5 (L-15) & HC-6.
 

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Grey Havoc

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I often wonder where Czechoslovakia might be today in terms of civil and military designs, manufacturing and exporting, if these two dramatic events never happened

A good question indeed.
 

hesham

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From L+K 20-21/1976.
 

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hesham

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From L+K 12/1966,

does anyone hear about this Czech DX-3 helicopter ?.
 

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Aubi

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That scheme depict a general layout of a modular utility autogyro similar to Ka-26 (which was obviously a helicopter). It serves only as ilustration to the text discusing uses of such machine (relevant text is in the next part of the article in 1966/13). Next part has similarly "conceptual" ilistrations of light tourist autogyro and turbine-engined future autogyro.
DX-3 was an autogyro built by the authors of the article. They founded a Svazarm club (Svazarm - Union for cooperation with the Army, organisation analogical to Soviet DOSAAF containing all clubs dealing with hobbies with possible military use, like electronics, flying, even model building) at the premises of Moravan company in Otrokovice (more famous as Zlín Aircraft). Part two of the article (L+K 1966/02) mentions more details about the construction and flying tests, the rest of this serial deals with autogyro theory, construction, flying etc.
 

hesham

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Thank you Aubi,

and from L+K 14/1966.
 

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hesham

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From L+K 5/1976,

you feel the drawing differs from previous drawings to HC-4.
 

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hesham

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Hi,

The power-plant of the Maier helicopter. There are two single-cylinder engines, each driving a three-blade propellor. I suspect the conical thing above the hub is the fuel-tank, which avoid the problem of trying to feed petrol through a rotating bearing. It does not look big enough for very long flights...

 

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Aubi

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In September 1942, Major Josef Crha accepted two new students, Jiří Maier and Antonín Livers, to the Aero company trade school. In 1944 Maier constructed a tiny gasoline-fueled aviation engine made from dural-aluminum alloy developed by Livers. Impressed Crha ordered twenty more engines to be made as gifts for various important people. Right after the end of the war both boys togeher with Jan Plachta joined the army under a six-year contract and started teaching at the new School for aviation youth Crha founded in Liberec. Maier and his friends decided to made a helicopter, for which they salvaged anything remotely useful from the German wrecks and warehouses at the Liberec airfield. For working place they used old barn in the garden of a house of Maier's girlfriend family. In 1947, the Ministry of defence decided to forgave all instructors the remaining years of service, so they were free to go civilian or join the army under new contract. Livers and Plachta joined again, but Maier decided to leave army so he could marry the girl and finish his civilian glider training. He started working at the POL factory, where his new boss, former bomber from a Czechoslovak squadron in the RAF, allowed him to continue working on his helicopter using the factory equipment. In late 1948 the helicopter managed few short hops, but the engines mounted on the main rotor were too weak. Even with weak engines, he managed to gain altitude of 20 meters and the helicopter behaved like his calculations predicted. Maier had plan for development with stronger engines, but the needs of his family forced him to offer the prototype to various aviation companies. None showed interrest. In 1951, Maier moved to Teplice to a new job, and sold his helicopter for scrap.
 

hesham

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I think that,I saw in L+K magazine,this designation HC-201 ?,was it real one ?.
 

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