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The Austrian firm CycloTech has just revealed its concept for its future carcar flying. With so many flying taxis in development, this announcement might have gone unnoticed, if not for the very unusual propulsion system called CycloRotor. The manufacturer demonstrated the first flight of its eVTOL prototype (aéronefaéronef electric vertical takeoff and landing or Adav) a few months ago. However, the prototype is far from resembling the finished product.
The flying car will be called CruiseUp and uses six rotors in all. It is thrustersthrusters Voith Schneider, a cycloidal propulsion system with steerable blades usually used on boats. The CruiseUp has two at the front and two at the rear, as well as two integrated into the longitudinal axis of the vehicle.
A flying car for city-suburb journeys
This particular configuration allows it to provide thrust in all directions without tilting the device. The vehicle will be able to carry two passengers and reach a vitessevitesse of 150 kilometers per hour, with an estimated range of 100 kilometers. The autonomy is quite astonishing given that the device does not have wings for gliding, and will therefore have to provide vertical thrust at all times. According to the manufacturer, the device measures 6.7 meters long and 3.3 meters wide, or 50% more than a conventional car while being smaller than the majority of flying taxi projects.
CycloTech intends to create a flying car for the general public rather than a flying taxi and is particularly targeting journeys between large cities and their suburbs, indicating that in most cases it is a journey of less than 20 kilometers in flight. ‘birdbird. The manufacturer does not give a launch date for CruiseUp, but indicates that mainstream flying cars will not arrive for a decade.
CycloRotor, the strange cycloidal thruster for VTOL will be able to take to the air
The Austrian company CycloTech is making waves again with its eVTOL concept, the engine of which is based on cycloidal thrusters usually used by the navy.
Article from Sylvain BigetSylvain Bigetpublished on 06/09/2023
VTOL (vertical take-off and landing aircraft) flying taxi projects are numerous and some are very successful. The most efficient systems at the moment are those which allow the rotors to be reoriented on the vertical plane with a real wing after takeoff to transform it into an airplane.
There are also new engines that have not yet been used. This is the case of the CycloRotor of CycloTech. The Austrian company has been working for years on an engine based on rotating barrels. Their demonstration aircraft has these rollers placed at the end of its four arms. These barrels rotate at a constant speed, which allows a quantity ofenergyenergy predictable. Nor does the couple need to be delusional to stabilize the aircraft.
This means that the motor is not necessarily electric to take off the device vertically. On the other hand, the blades located inside can be reoriented to apply more or less thrust. It is the modification of their angle which makes it possible to change direction and altitude. For each change of angle, the effects are immediate.
The 83 kilo prototype, equipped with its barrels equipped with variable pitch blades. The latter come from Voith-Schneider technology invented in 1926 and used for certain ships. Adapted to aviation, this system would allow the aircraft to carry out vertical takeoffs and landings before cruising. © CycloTech
An invention almost 100 years old
The concept is based on an invention dating from 1926 called Voith-Schneider propellers. This propulsion system is used at sea for tugboats, certain ferries and other transport vehicles. constructionconstruction maritime. More than a year and a half ago, the firm had already carried out its first indoor tethered flights with a demonstratordemonstrator over 80 kilos. Since then, the evolution of this cycloidal propulsion system seemed to be slipping. But, in March, things accelerated for CycloTech. The firm has obtained authorization from the Austrian authorities to be able to fly the prototype outdoors.
He also had to prove that this engine is quieter than that of a helicopterhelicopter. This is the condition imposed to be able to fly eVTOL taxis in the city. To achieve this, CycloTech carried out a vast campaign of tests and acoustic surveys. According to its measurements, the motor would emit 59 dBA at a distance of 100 meters. It’s the equivalent of a two-person discussion. But there are some snags, since this measure does not concern the commercial type aircraft, but a reduced-scale prototype. It seems reasonable to imagine that the CycloRotors will probably be noisier than another propeller system, after a scalingscaling.
Cyclogyro, a cycloidal boat thruster that aims to revolutionize air transport
The Austrian company CycloTech is working to adapt the principle of the Voith Schneider propeller designed almost a century ago for maritime transport in order to use it in aviation, notably for flying taxis and dronesdrones.
Article from Marc ZaffagniMarc Zaffagnipublished on October 2, 2020
As flying taxi projects proliferate, many of them are based on the model of the capable vertical take-off and landing (ADAV) aircraft, once inairair, to make the transition to horizontal flight like an airplane. This solution has the advantage of simplifying the necessary airport infrastructure and being able to integrate them into the heart of city centers, where this type of solution is supposed to offer an alternative to saturated and polluting road transport. But the technical solutions to ensure the transition between vertical and horizontal flight are generally complex, as demonstrated in this recent example of the Q-Starling. CycloTechan Austrian company, has been working since 2004 on a surprising solution that could change the situation.
This involves adapting the Voith Schneider cycloidal thruster (VSP) to aeronautics. The VSP was invented almost a century ago as a propulsion system for boats. It is a propeller composed of vertical steerable blades which rotate on a central hub and tilt so as to produce thrust in the desired direction. A system that offers great maneuverability to ships. CycloTech is working on a rotor called Cyclogyro which uses this principle to combine the advantages of adav and high-speed horizontal flight.
The operating principle of the Cyclogyro cycloidal thruster with its eccentric hub is well described in this video. © CycloTech
The Cyclogyro rotates at 3,100 rpm
The system is based on a central hub to which the blades are connected by links. The hub can move 360° around the central axis. When we change the position of the hub in relation to the axis of rotation, the blades, which rotate at constant speed, will modify their angle of attack and thus create thrust. Nine prototypes have been developed and the latest should be ready to perform a demonstration flight on an aircraft by the end of the year, CycloTech announces. With a total diameter of 350 mm and 420 mm wide, the Cyclogyro has five blades which rotate at 3,100 rpm and develop a thrust of 247 N.
According to CycloTech, this cycloidal thruster provides direct control of the magnitude and direction of thrust, allowing a stable transition between vertical and horizontal flight as well as high maneuverability. According to its designers, one of the most complex challenges in adapting the system from water to air was the very high number of revolutions per minute that had to be achieved.
THE applicationsapplications envisaged by CycloTech range from airliners to flying taxis as well as inspection or delivery drones. The company has even patented a concept for a helicopter without a tail rotor. According to her, the Cyclogyro can be powered 100% by electricity or by a motor. hybridhybrid in order to extend flight autonomy. The demonstration announced for the fourth quarter should allow us to judge on the basis of the validity of all these announcements. There will then remain a stage which is likely to be long and complicated: the certification of this propulsion system, unique in aeronautics.
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