Flying car
A flying car or roadable aircraft is a type of vehicle which can function both as a road vehicle and as an aircraft. As used here, this includes vehicles which drive as motorcycles when on the road. The term "flying car" is also sometimes used to include hovercars and/or VTOL personal air vehicles. Many prototypes have been built since the early 20th century, using a variety of flight technologies. Most have been designed to take off and land conventionally using a runway. Although VTOL projects are increasing, none has yet been built in more than a handful of numbers.
Their appearance is often predicted by
History
Early 20th century
In the late 1800s, American immigrant Gustave Whitehead designed aircraft with wheels and a gasoline-powered engine, including his no.21 model built in 1901.[1][2] Consensus among historians is that Whitehead's no. 21 did not achieve sustained self-powered flight.[1][3][4] Some historians continue to assert Whitehead's craft flew at various dates prior to the Wright Brothers' craft, based on a series of unverifiable and contradictory eye-witness accounts.[3][5]
Aircraft designer Glenn Curtiss built his Autoplane in 1917. It had a pusher propeller for flight, with removable flight surfaces including a triplane wing, canard foreplane and twin tails. It was able to hop, but not fly.[6]
In 1935, Constantinos Vlachos built a prototype of a 'tri-phibian' vehicle with a circular wing, but it caught fire after the engine exploded while he was demonstrating it in Washington, D.C. Vlachos was badly injured and spent several months in hospital.[7][8] The machine is most notable for a newsreel that captured the incident.[9]
The
The first fixed wing roadable aircraft to fly was built by Waldo Waterman. Waterman was associated with Curtiss while Curtiss was pioneering amphibious aircraft at North Island on San Diego Bay in the 1910s. On 21 March 1937, Waterman's Arrowbile first took to the air.[11] The Arrowbile was a development of Waterman's tailless aircraft, the Whatsit.[12] It had a wingspan of 38 feet (12 m) and a length of 20 feet 6 inches (6.25 m). On the ground and in the air it was powered by a Studebaker engine. It could fly at 112 mph (180 km/h) and drive at 56 mph (90 km/h).
In 1942, the British army built the Hafner Rotabuggy, an experimental roadable autogyro that was developed with the intention of producing a way of air-dropping off-road vehicles. Although initial tests showed that the Rotabuggy was prone to severe vibration at speeds greater than 45 miles per hour (72 km/h), with improvements the Rotabuggy achieved a flight speed of 70 mph (113 km/h). However, the introduction of gliders that could carry vehicles (such as the Waco Hadrian and Airspeed Horsa) led to the project's cancellation.[13]
Late 20th century
Although several designs (such as the ConVairCar) have flown, none have enjoyed commercial success, and those that have flown are not widely known by the general public. The most successful example, in that several were made and one is still flying, is the 1949
In 1946, the Fulton FA-2
The
One notable design was Henry Smolinski's Mizar, made by mating the rear end of a Cessna Skymaster with a Ford Pinto, but it disintegrated during test flights killing Smolinski and the pilot.
Project Prodigal
Moller began developing VTOL craft in the late 1960s, but no Moller vehicle has ever achieved free flight out of ground effect. The
In the mid-1980s, former Boeing engineer Fred Barker founded Flight Innovations Inc. and began the development of the Sky Commuter, a small duct fans-based VTOL aircraft. It was a compact, 14-foot-long (4.3 m) two-passenger and was made primarily of composite materials.[27] In 2008, the remaining prototype was sold for £86k on eBay.[28]
21st century
In 2009 the U.S., the
The Parajet Skycar utilises a paramotor for propulsion and a parafoil for lift. The main body consists of a modified dune buggy. It has a top speed of 80 mph (130 km/h) and a maximum range of 180 miles (290 km) in flight. On the ground it has a top speed of 112 mph (180 km/h) and a maximum range of 249 miles (401 km). Parajet flew and drove its prototype from London to Timbuktu in January 2009.
The
The
The
At the 2014 Pioneers Festival at Wien (Austria)Klein Vision in Slovakia have developed a prototype AirCar, which drives like a sports car and for flight has a pusher propeller with twin tailbooms, and foldout wings. In June 2021, the prototype carried out a 35-minute flight between airports.[42][43] It was type certified as an aircraft in January 2022.[44]
The
The production-ready single-engine, roadable
On 15 April 2021, Los Altos, California, became home to the world's first consumer flying car showroom.[53] However, as yet there are no certified flying cars in production.
In 2023 Doroni Aerospace earned an official FAA Airworthiness Certification. It is powered by ten independent propulsion systems. They company claimed a top speed of 140 mph and a 60-mile range. It includes two electric motors with patented ducted propellers. The machine is 23 ft long and 14 ft wide.[54]
Design
A flying car must be capable of safe and reliable operation both on public roads and in the air. For mass adoption, it will also need to be environmentally friendly, able to fly without a fully qualified pilot at the controls, and come at affordable purchase and running costs.
Design configurations vary widely, from modified road vehicles such as the
Lift
Like other aircraft, lift in flight is provided by a
The simplest and earliest approach was to take a driveable car and attach removable flying surfaces and propeller. However, when on the road, such a design must either tow its removable parts on a separate trailer or leave them behind and drive back to them before taking off again.
Other conventional takeoff fixed-wing designs, such as the Terrafugia Transition, include folding wings that the car carries with it when driven on the road.
Vertical takeoff and landing (VTOL) is attractive, as it avoids the need for a runway and greatly increases operational flexibility. Typical designs include rotorcraft and ducted fan powered lift configurations.[56] Most design concepts have inherent problems.
Rotorcraft include helicopters with powered rotors and autogyros with free-spinning rotors. For road use, a rotor must, like many naval helicopters, be either two-bladed or foldable. The quadcopter requires only a simple control system with no tail. The autogyro relies on a separate thrust system to build up airspeed, spin the rotor and generate lift. However, some autogyros have rotors that can be spun up on the ground and then disengaged, allowing the aircraft to jump-start vertically. The PAL-V Liberty is an example of the autogyro type.
Ducted-fan aircraft such as the
Power
The flying car places unique demands on the vehicle power train. For a given all-up weight, an aero engine must deliver higher power than its typical road equivalent. However, on the road the vehicle must handle well and not be overpowered. Power must also be diverted between the airborne and road drive mechanisms. Some designs therefore have multiple engines, with the road engine being supplemented, or even replaced by, additional flight engines.
As with other vehicles, power has traditionally been supplied by internal combustion engines, but electric power is undergoing rapid development. It is coming into increasing use on road vehicles, but the weight of the batteries currently makes it unsuited to aircraft. However its low environmental signature makes it attractive for the short trips and dense urban environments envisaged for the flying car.
On the road, most flying cars drive the road wheels in the conventional way. A few use the aircraft propeller in similar manner to an airboat, but this is inefficient.
In the air, a flying car will typically obtain forward thrust from one or more propellers or ducted fans. A few have a powered helicopter rotor. Jet engines are not used due to the ground hazard posed by the hot, high-velocity exhaust stream.
Safety
In order to operate safely, a flying car must be certified independently as both a road vehicle and an aircraft, by the respective authorities. The person controlling the vehicle must also be licensed as both driver and pilot, and the vehicle maintained according to both regimes.
Mechanically, the requirements of powered flight are so challenging that every opportunity must be taken to keep weight to a minimum. A typical airframe is therefore lightweight and easily damaged. On the other hand, a road vehicle must be able to withstand significant impact loads from casual incidents while stationary, as well as low-speed and high-speed impacts, and the high strength this demands can add considerable weight. A practical flying car must be both strong enough to pass road safety standards and light enough to fly. Any propeller or rotor blade also creates a hazard to passers-by when on the ground, especially if it is spinning; they must be permanently shrouded, or folded away on landing.
For widespread adoption, as envisaged in the near future, it will not be practicable for every driver to qualify as a pilot and the rigorous maintenance currently demanded for aircraft will be uneconomic. Flying cars will have to become largely
Regulatory regimes are being developed in anticipation of a large increase in the numbers of autonomous flying cars and personal air vehicles in the near future, and compliance with these regimes will be necessary for safe flight.[citation needed][where?]
Control
A basic flying car requires the person at the controls to be both a qualified road driver and aircraft pilot. This is impractical for the majority of people and so wider adoption will require computer systems to de-skill piloting. These skills include aircraft manoeuvring, navigation and emergency procedures, all in potentially crowded airspace. The onboard control system will also need to interact with other systems such as air traffic control and collision-risk monitoring. A practical flying car may need to be capable of full
Environment
A flying car capable of widespread use must operate acceptably within a heavily populated urban environment. The lift and propulsion systems must be quiet enough not to cause a nuisance, and must not create excessive pollution. For example, pollution emissions standards for road vehicles must be met.
The clear environmental benefits of electric power are a strong incentive for its development.
Cost
The needs for the propulsion system to be both small and powerful, the vehicle structure both light and strong, and the control systems fully integrated and autonomous, can only be met at present, if at all, using advanced and expensive technologies. This may prove a significant barrier to widespread adoption.[59]
Flying cars are used for relatively short distances at high frequency. They travel at lower speeds and altitudes than conventional passenger aircraft. However optimal fuel efficiency for aeroplanes is obtained at higher speeds and altitudes, so a flying car's energy efficiency will be lower than that of a conventional aircraft.[60] Similarly, the flying car's road performance is compromised by the requirements of flight and the need to carry around the various extra parts, so it is also less economical than a conventional motor car.
Industry groups
In April 2012, the International Flying Car Association was established to be the "central resource center for information and communication between the flying car industry, news networks, governments, and those seeking further information worldwide".[61] Because flying cars need practical regulations that are mostly dealt with on a regional level, several regional associations were established as well, with the European Flying Car Association (EFCA) representing these national member associations on a pan-European level (51 independent countries, including the European Union Member States, the Accession Candidates and Russia, Switzerland, Turkey, Ukraine).[62] The associations are also organizing racing competitions for roadable aircraft in Europe, the European Roadable Aircraft Prix (ERAP), mainly to increase awareness about this type of aircraft among a broader audience.[63]
List of flying cars
Type | Country | Class | Date | Status | No. | Notes |
---|---|---|---|---|---|---|
Aerauto PL.5C | Italy | Folding wings | 1949 | Flown | 1 | |
Aerocar | US | Detachable wings | 1946 | Flown | 5 | 4 Aerocars and one Aerocar III built (The Mk. II was not a flying car). |
Aerocar 2000
|
US | Detachable wings | 2000 approx. | Flown | ||
AeroMobil
|
Slovakia | Folding wings | 2013 | Flown | v3.0 crashed. 4.0 under development | |
Alef Model A | US | Tilting biplane | 2023 | Unbuilt | 0 | Attracted significant investment.[64][65] |
Audi Pop.Up Next | Germany | Quadcopter | 2018 | Unbuilt | 1 | |
Autogiro Company of America AC-35 | US | Autogyro | 1935 | Flown | 1 | |
AVE Mizar | US | Detachable wings | 1971 | Flown | 1 | |
Bel Geddes' "Motorcar No. 9." | US | Folding wings | 1945 | Unbuilt | Concept [citation needed] | |
Bryan Autoplane | US | Folding wings | 1953 | Flown | 2 | Model II converted to Model III. |
Butterfly Super Sky Cycle | US | Flown | 2009 | Flown | Homebuild autogyro. Registered motorcycle | |
Convair Model 116 ConVairCar | US | Detachable wings | 1946 | Flown | 1 | |
Convair Model 118 ConVairCar | US | Detachable wings | 1947 | Flown | 2 | Second vehicle re-used the aircraft section from the first. |
Curtiss Autoplane | US | Detachable wings | 1917 | Not flown | 1 | Achieved short hops |
Dixon Flying Ginny | US | Helicopter | 1940 | Flown | 1 | Co-axial rotor.[66] |
Ford Volante | US | Ducted fan | 1958 | Unbuilt | Concept.[67][68] | |
Fulton Airphibian | US | Detachable wings | 1946 | Flown | 4 | |
Hafner Rotabuggy | UK | Detachable rotor | 1942 | Flown | Willys MB jeep, air-towed as a rotor kite. | |
Handley Page HP.120[69][70] | UK | Lift fan | 1961 | Unflown | 2-man VTOL convertible "Jumping Jeep" project | |
I-TEC Maverick | US | Parafoil | 2008 | Flown | ||
Klein Vision AirCar | Slovakia | Folding wings | 2021 | Flown | 1 | Production model in development. |
Lebouder Autoplane | France | Detachable wings | 1973 | Flown | 1 | Won prizes.[clarification needed] |
Moller M400 Skycar | US | Vectored fan | 1960s | Not flown | Unsuccessful as of 2019 | |
Monster Garage "Red Baron" | US | Detachable wings | 2005 | Flown | 1 | Based on a Panoz Esperante sports car, with detachable airframe.[71] |
PAL-V Liberty | Netherlands | Autogyro | 2012 | Flown | Production model under development. | |
Parajet Skycar | UK | Parafoil | 2008 | Flown | 1 | |
Piasecki VZ-8 Airgeep | US | Ducted rotor | 1959 | Flown | VTOL "flying jeep". | |
Plane Driven PD-1 | US | Folding wings | 2010 | Flown | 2 | Modified Glasair Sportsman 2+2 aircraft. The second prototype is designated the PD-2. |
Samson Switchblade | US | Folding wings | 2023 | Flown | 1 | [72] |
Scaled Composites Model 367 BiPod | US | Detachable wings | 2011 | Not flown | 1 | Twin-fuselage technology development vehicle. Not flown. |
Skroback Roadable Airplane | US | Multiplane | 1925 | Not flown | 1 | |
SkyRider X2R | US | Unbuilt | ||||
Taylor Aerocar | See Aerocar | |||||
Terrafugia Transition | US | Folding wings | 2009 | Flown | ||
Terrafugia TF-X | US | Hybrid | Unbuilt | VTOL convertiplane with folding wings and rotors. | ||
Urban Aeronautics X-Hawk | Israel | Unbuilt | VTOL. Under development.[73] | |||
Vlachos Triphibian | US | 1936 | [citation needed] | |||
Wagner Aerocar | Germany | Helicopter | 1965 | Flown | ||
Waterman Arrowbile | US | Folding wings | 1935 | Flown | 1 | |
Whitehead No. 21 | US | Folding wings | 1901 | Not flown | 1 |
Popular culture
The flying car was and remains a common feature of
Anticipation
Flying cars have been under development since the early days of motor transport and aviation, and many futurologists have predicted their imminent arrival. Aircraft manufacturer Glenn Curtiss unveiled his unflyable Autoplane in 1917. In 1940, vehicle manufacturer Henry Ford predicted that; "Mark my word: a combination airplane and motorcar is coming. You may smile, but it will come.”[74]
From 1945, industrial designer Norman Bel Geddes promoted his concept for a streamlined flying car with folding wings.[75] In the late 1950s, Ford's Advanced Design studio publicised a 3/8 scale concept car model, the Volante Tri-Athodyne. It featured three ducted fans, each with its own motor, that would lift it off the ground and move it through the air. Ford admitted that "the day where there will be an aero-car in every garage is still some time off", also suggesting that "the Volante indicates one direction that the styling of such a vehicle would take".[67][68]
Where's my flying car?
Despite a century of anticipation, no flying car has yet proved a practical proposition and they remain an experimental curiosity. This long-term failure to make any impact on society has led to the meme, "Where's my flying car?"
Here we are, less than a month until the turn of the millennium, and what I want to know is, what happened to the flying cars? We're about to become Americans of the 21st century. People have been predicting what we'd be like for more than 100 years, and our accoutrements don't entirely live up to expectations. ... Our failure to produce flying cars seems like a particular betrayal since it was so central to our image.
— Gail Collins, (1999) [76]
This new millennium sucks! It's exactly the same as the old millennium! You know why? No flying cars!
— Lewis Black, (2018)[77]
The question "Where's my flying car?" has become emblematic of the wider failure of many modern technologies to match futuristic visions that were promoted in earlier decades.[78][79]
Fictional flying cars
The flying car has been depicted in many works of fantasy and science fiction.[80] Some notable examples include:
- Supercar starred in its own children's TV show in the UK, between 1961 and 1962. It was jet-powered with VTOL capability, and on the road it hovered rather than used wheels. Created by Gerry Anderson, it was the first show to credit his supermarionation puppet technology.[81]
- The Jetsons American animated cartoon sitcom was originally aired from 1962 to 1963. It featured flying cars as ubiquitous. They typically had a large bubble roof, the design being inspired by a Ford concept road car from 1954, the FX-Atmos.[82]
- The film Chitty Chitty Bang Bang (1968) features a car that flies via magic.
- A flying 1974 AMC Matador coupe features in The Man with the Golden Gun (1974), the ninth in the James Bond film series.[83] The Matador coupe is transformed into an aeroplane in similar manner to the AVE Mizar, by attaching a large wing with engine and tail unit to the car.[84][85] In aircraft configuration it is 9.15 m (30 ft) long, 12.80 m (42 ft) in span and 3.08 m (10 ft) high.[86] The film prop was not airworthy and a 1 m (39 in)-long remote control model was used for the aerial sequences.[86][87]
- In the Science Fiction Museum and Hall of Fame in Seattle, Washington.[90]
- In the Back to the Future (1985) films, the DeLorean time machine car was modified to be capable of normal flight.[91]
- In the film
See also
References
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Further reading
- BBC News Flying cars in 25 years, BBC News Online, 22 September 2004.
- Brown, Stuart F. Why We're Not Driving the Friendly Skies, The New York Times online, 22 August 2014, and in print on 24 August 2014, on p. AU1 of the New York edition.
- Feltman, Rachel. Why Don't We Have Flying Cars?, Popular Mechanics, 21 February 2013.
- Hakim, Danny. A Helicopter of One's Own, The New York Times online, 16 June 2014, and in print on 17 June 2014, p. D2 of the New York edition.
- Hodgdon, Theodore, A.; Onosko, Tim (ed.) "At Last —a Convertible Auto-Plane", in Wasn't the Future Wonderful?: A View of Trends and Technology from the 1930s, Dutton, 1979, pp. 152–153, ISBN 978-0525475514.
External links
- Roadable Times, pictures and descriptions of over 70 designs of flying cars and roadable aircraft past and present.
- How Flying Cars Will Work at HowStuffWorks.