Written by Álvaro Rubio 1º Bachillerato 2 IES Julio Caro Baroja Fuenlabrada, Madrid Spain

1. Martin Jetpack The Martin Jetpack is a experimental aircraft. Its trade name calls it a “jet pack” , but is not jet- or rocket-powered. It has been developed by the Martin Aircraft Company of New Zealand, and was unveiled on July 29, 2008 at the Experimental Aircraft Association´s 2008 Air Venture in Oshkosh, Wisconsin, USA. It is classified by the Federal Aviation Administration as an experimental ultra-ligt airplane. Unlike earlier devices called "jetpacks", the Martin Jetpack is the first to be considered a practical device. It has been under development for over 27 years and uses a gasoline (premium) engine with two ducted fans to provide lift. Theoretically it can reach a speed of 60 miles per hour, an altitude of 8,000 feet, and fly for about 30 minutes on a full fuel tank. Martin Aircraft planned to deliver the first jetpacks to ten customers in early 2010.

2. The Jetpack is a small VTOL device, with two ducted fans that provide lift. It is powered by a 2.0 litre V-4 piston 200-horsepower gasoline (premium) engine. The pilot straps him/herself onto it, and does not sit. It is much too big for him/her to walk about wearing it, so it cannot be classed as a backpack device. It does not have a jet turbine or rocket motor, however the Jet in Jetpack refers to the production of two jets of air from its ducted fans. Most helicopters require a tail rotor to counteract the rotor torque; this and the articulated head complicate flying, construction and maintenance enormously. The Jetpack is designed to be torque neutral – there is no tail rotor, no collective, no articulating or foot pedals – and this simplifies flying dramatically. Pitch and roll are controlled by one hand, yaw and the throttle by the other. The Martin Jetpack meets the Federal Aviation Administration's classification of an ultra-light aircraft. It uses the same gasoline used in cars, is relatively easy to fly, and is cheaper to maintain and operate than other ultra-aircraft.

3. General Features Capacity: 1 passenger Length: 5 ft Wingspan: (width) 5.5 ft Height: 5 ft Emptyweight: 250 lb Useful load: 280 lb Powerplant: 2× Martin Aircraft 2.0L V4. 2 strokes, 200 hp (150 kw) Max 6000 rpm each Propellerdiameter: 1 ft 7 in

4. This invention is a great discovery in the world of science, seems unimaginable to be able to fly like in the films or comics.

5. My opinion This invention ,in my opinion, is a great advance technologically, but this invention is too expensive not affordable foreverybody. With this invention you can fly, although not more than 40 minutes. It is a very innovating apparatus and surely it is very difficult to use , due to outpost technologies. The Web site of this invention is http://www.martinjetpack.com/ I believe that it is a great invention, it is very good invention but it is not possible to acquire it each person due to its lifted price