News and Analysis on Ligeti Stratos

Australsky Amatérský letoun

Posted 10.18.2012 in News by Christopher

This article is written in Czech. Click the image to load a scan of the original article.                                                                          

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Ligeti Stratos: Radical new joined wing design from Australia in a class of it's own.

Posted 09.05.2012 in News by Christopher

• The weight of an ultralight • Performance of a homebuilt aircraft • Gliding ratio and fuel economy of a motor glider • Trailerable without dismantling • Safe canard stall and spin characteristics • Extra pilot protection of the joined wing design • Integral ballistic parachute system • Electric restart

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LGT Stratos shows its sleek styling in flight over Penfield Aerodrome near Melbourne.

Posted 09.05.2012 in News by Christopher

Some sceptics have likened it to a coathanger or paperclip, but this smallest of ultra-light planes is breaking new ground in flying. The 75kg (165-pound) midget can fly sideways, reach 180 kmh (112 mph) and withstand 30 knot winds, all on a two-stroke 24 hp motor. The radical new design developed in Australia relies on a joined wing configuration and flight controls on the canard and wingtips to upgrade manoeuvrability while ensuring stability without a large wingspan.

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It's only small, but it's a whizz…

Posted 09.05.2012 in News by Christopher

An unusually designed ultralight aircraft commanded the attention of enthusiasts and curious onlookers at a demonstration at Culluleraine at the weekend. Although it is unlike any ultralight yet built, organisers of the display said its design was the most efficient in the ultralight class. While most ultralights have engines of 40 horsepower, this version operates on 24 horsepower and is reported to be capable of speeds to 100 knots. Enthusiasts at the demonstration said the plane would revolutionise the concept of ultralight aircraft design.

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HOWARD LEVY reports on another of the more unusual shapes to be seen at Oshkosh '86, the Ligeti Stratos microlight

Posted 09.05.2012 in News by Christopher

Designer Charles K. Ligeti calls his joined-wing aircraft "Stratos", and refers to it as an ultra-compact, ultra-performance, ultralight aeroplane. It is tiny enough to be transported, fully assembled, sideways on a trailer behind a car and then hangared in an average family garage. The prototype's 24 h.p. engine and the craft's aerodynamic design provide a 112 m.p.h. maximum cruise speed, and the 166lb empty/392lb gross weight permits Stratos to meet the FAA's ultralight (American equivalent of microlight) category requirements.

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Unbroken Arrow

Posted 09.05.2012 in News by Christopher

Aussie ingenuity, super-composite materials and exciting new joined-wing technology resulted in this fast, super-light ducted fan homebuilt.

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The Ligeti Stratos…A Glimpse of the Future?

Posted 09.05.2012 in News by Christopher

If you happened to be driving from Chicago to Oshkosh a few days before opening day of the 1986 Oshkosh Convention, you might have seen a car pulling a trailer with a most unusual-looking all-white aircraft. Fully assembled, this aircraft's wings were turned so that they were moving in the same direction the car and trailer were moving and the whole aircraft was tilted up, making it look like it was in a 45 degree nose dive crossing the highway.

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ULTRA NEWS by Rob Box

Posted 09.05.2012 in News by Christopher

There were many who doubted that Charles Liegeti's LGT Stratos would fly. Only a handful, including Ligetti, knew it would. There were several similar designs on show at last year's Oshkosh--most were overweight more than 200 kg with a massive engine strapped to them and they flew! Even if only just.

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New Designs Available in Kit-Built Aircraft

Posted 09.05.2012 in News by Christopher

Velocity four-seat, canard-winged pusher aircraft shown at the Experimental Aircraft Assn convention (above) costs $18,000 in kit form without engine, propeller, avionics or flight instruments. The Velocity can be built in 600-800 hr. using normally available tools. The aircraft has a top speed of more than 200 mph, and rage of 2,000 mi. at 190-mph. cruise speeds. The Ligeti Stratos (right) joined-wing aircraft was the most radical new design at the Oshkosh show. The one-seat ducted-fan pusher has a maximum takeoff weight of 414 lb. and cruises at 97 kt, Kit cost is $8,000 complete, plus shipping from Australia. The joined-wing structure improves crashworthiness.

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Those Magnificent Men In Their Flying Lawn Mowers

Posted 09.05.2012 in News by Christopher

The truth is, I have a soft spot for the true aviators. I love the old Tiger Moths with their wire and canvas and engines which have to be started by hand as if you were stirring a pudding. I am enchanted by ancient Dr Havilland Rapides which appear to flap their wings like ungainly old pelicans. Or how about a little vintage Auter, the baby Austin of the air, which darned nearly flies backward in a high wind. Aviation in the 1980s would be too matter-of-fact, too computerised and full, except for one thing: there is an astonishing new breed, the ultralights. They seem to represent what flying is all about, what it was when it first started--do-it-yourself, build-your-own aviation.

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Sensationell und schnell

Posted 09.05.2012 in News by Christopher

North Balwyn, AUS: Schade, eines der faszinierendsten ultraleichten Flugzeuge ist um 13km-h ru schnell. Im V Bereich bringt es das Ligeti Stratos nicht unter 58 km-h. Ein Aus als UL. Da dieses Joined Wing Konnept leer jedoch nur 78 Kilogramm aufdie Waage bringt, wäre vielleicht noch etwas mit Flaps ru machen, um die notwendigen 45 km-h für die Stallspeed zu erreichen, die eine deutsche UL Zulassung ermöglichen würde. Abrebelst dann, wenn es langsam genug wäre, würden sich die Tunerdie Zähen ausbeißen. Rund 60 Zentimeter FanDurchmesser bedingten eine hohe Luftschrauben-Drehyahl, um die angegebenen Leistungen zu erreichen. Ein gewaltiges Hindernis, um auch leise sein zu können.

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A Short History of the "Ligeti Stratos"

Posted 09.05.2012 in News by Christopher

The Ligeti Stratos is the brainchild of a remarkable man, Charles Ligeti, who arrived in Australia from Czechoslovakia in 1977 with his wife, Helena, and a head full of aircraft designs which he was anxious to try out. A Chemical Engineer with a MSc, Charles read everything about aircraft construction and design that he could get his hands on and taught himself Aerodynamics and Composite Materials Technology, to prepare for building his own aeroplane. By 1982, the hard-working Ligetis had bought a house and Charles began work on the realisation of his radically different design, testing the unusual configuration first using 1/4 scale radio-controlled models. When these tests showed that the model would recover from spins and unusual attitudes, Charles and his wife began construction of the prototype Stratos in their workshop, and after ground testing and fitting of a more suitable engine, the Stratos was successfully test flown by Charles on 25.4.85. In the next two years, the Stratos flew more than 300 hours, all with Ligeti at the controls. It was looped, rolled and generally thrown around the sky for the fun of it, but proved impossible to stall or spin; like many canard aircraft, it can be flown slowly with full back stick, the nose gently nodding as the canard stalls and recovers. Having tested the aircraft to his full satisfaction, Charles decided to go into production.

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