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A reactionless drive is a hypothetical device producing motion without the exhaust of a propellant.A propellantless drive is not necessarily reactionless when it constitutes an open system interacting with external fields; but a reactionless drive is a particular case of a propellantless drive that is a closed system, presumably in contradiction with the law of conservation of momentum.
Free-piston engine used as a gas generator to drive a turbine. A free-piston engine is a linear, 'crankless' internal combustion engine, in which the piston motion is not controlled by a crankshaft but determined by the interaction of forces from the combustion chamber gases, a rebound device (e.g., a piston in a closed cylinder) and a load device (e.g. a gas compressor or a linear alternator).
Camless piston engine. A camless or free-valve piston engine is an engine that has poppet valves operated by means of electromagnetic, hydraulic, or pneumatic [1] actuators instead of conventional cams. Actuators can be used to both open and close valves, or to open valves closed by springs or other means. Camshafts normally have one lobe per ...
Ion thruster. An ion thruster, ion drive, or ion engine is a form of electric propulsion used for spacecraft propulsion. An ion thruster creates a cloud of positive ions from a neutral gas by ionizing it to extract some electrons from its atoms. The ions are then accelerated using electricity to create thrust.
The Helical engine is a proposed spacecraft propulsion drive that, like other reactionless drives, would violate the laws of physics. [1] [2] [3]The concept was proposed by David M. Burns, formerly a NASA engineer at the Marshall Space Flight Center in Alabama, in a non-peer-reviewed report published on a NASA server in 2019 describing it as "A new concept for in-space propulsion is proposed ...
F is the resulting force. I is the electric current. d is the air gap. k is the ion mobility of the working fluid, [19] measured in A s 2 kg −1 in SI units, but more commonly described in units of m 2 V −1 s −1. A typical value for air at surface pressure and temperature is 1.5×10 −4 m 2 V −1 s −1). [19]
VFA-143 "Pukin Dogs" F-14B and F/A-18E in 2005. The Super Hornet is a redesign of the McDonnell Douglas F/A-18 Hornet.The wing and tail configuration trace its origin to a Northrop prototype aircraft, the P-530, c. 1965, which began as a rework of the lightweight Northrop F-5E (with a larger wing, twin tail fins and a distinctive leading edge root extension, or LERX). [6]
The Lockheed Martin/Boeing F-22 Raptor is an American twin-engine, all-weather, supersonic stealth fighter aircraft developed and produced for the United States Air Force (USAF). As a product of the USAF's Advanced Tactical Fighter (ATF) program, the aircraft was designed as an air superiority fighter , but also incorporates ground attack ...