modern propulsions Free Articles
Geothermal Energy
Authors: Relly Victoria V. Petrescu and Florian Ion T. Petrescu Geothermal power requires no fuel (except for pumps), and is therefore immune to fuel cost fluctuations.
Read MoreMilitary aviation, Part II
Authors: Relly Victoria Virgil Petrescu and Florian Ion Tiberiu Petrescu
Read MoreFlight memories
Authors: RVV Petrescu and FIT Petrescu According to Aulus Gellius, Archytas, the Ancient Greek philosopher, mathematician, astronomer, statesman, and strategist, was reputed to have designed and built, around 400 BC, the first artificial, self-propelled flying device, a bird-shaped model propelled by a jet of what was probably steam, said to have actually flown some 200 metres. This machine, which its inventor called The Pigeon, may have been suspended on a wire or pivot for its flight.
Read MoreNACA and NASA, Part VII
Authors: Relly Victoria Virgil Petrescu and Florian Ion Tiberiu Petrescu
Read MoreAbout Helicopters
Authors: Relly Victoria Virgil Petrescu and Florian Ion Tiberiu Petrescu A helicopter is a type of rotorcraft in which lift and thrust are supplied by one or more engine-driven rotors. In contrast with fixed-wing aircraft, this allows the helicopter to take off and land vertically, to hover, and to fly forwards, backward, and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft would not be able to take off or land.
Read MoreHistory of Aviation
The man has always wanted to be able to fly. The dream or although it has achieved, has not been reached yet fully. The fuse of the flight today is much higher than in the past, but is not yet complete. Although they have carried out the steps in the increase of the safety of a ship in flight, there are still many steps to do. For our passengers, but also for our pilots, these brave people and beautiful, it's time to do something in addition, something more.
Read MoreAircraft Carriers
Authors: Relly Victoria Virgil Petrescu and Florian Ion Tiberiu Petrescu
Read MoreModern Propulsions for Aerospace-Part II
The aircraft engine (ionic propulsion unit of ions, that accelerates the positive ions through a potential difference) is approximately ten times more efficient than classic system based on combustion.
Read MoreModern Propulsions for Aerospace
A spacecraft propulsion is any method used to accelerate spacecraft and artificial satellites. There are several different methods, each with advantages and disadvantages, spacecraft propulsion being an active area of research. However, most current spacecraft are propelled by forcing a gas exits through the rear of the vehicle at high speed through supersonic nozzle of a rocket engine.
Read MoreManagement of Renewable Energies and Environmental Protection, Part III
Authors: RVV Petrescu and FIT Petrescu
Read MoreNACA and NASA, Part VI
Authors: Relly Victoria Virgil Petrescu and Florian Ion Tiberiu Petrescu
Read MoreNACA and NASA, Part I
Authors: Relly Victoria Virgil Petrescu and Florian Ion Tiberiu Petrescu
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