EmDrive

EmDrive_built_by_Eagleworks_inside_the_test_chamber

Emdrive_schematic

IR_imagery_of_RF_amplifier_and_heat_sink

Proposed reactionless propulsion drive

The EmDrive (also known as the RF resonant cavity thruster) is a proposed type of reactionless drive that was first developed by the British engineer Roger Shawyer in 2001. The concept of the EmDrive is based on the idea of using microwaves to create thrust without the need for propellant, which would theoretically allow for highly efficient space travel.

Principle of Operation

The EmDrive operates by generating microwaves using a magnetron and directing them into a closed, conical resonant cavity. According to its proponents, the shape of the cavity causes the microwaves to exert a net force in one direction, producing thrust. This would violate the law of conservation of momentum and Newton's third law of motion, which has led to significant skepticism within the scientific community.

Development and Testing

Roger Shawyer first proposed the EmDrive in 2001 and conducted initial tests that he claimed demonstrated a small but measurable thrust. Subsequent tests by various independent groups, including a team at NASA's Eagleworks Laboratories, have produced mixed results. Some tests have reported small amounts of thrust, while others have found no measurable effect.

Controversy and Criticism

The EmDrive has been the subject of considerable controversy. Critics argue that the device violates fundamental principles of physics, such as the conservation of momentum. Many scientists believe that any observed thrust is likely due to experimental error or other mundane effects, such as thermal expansion or electromagnetic interference.

Potential Applications

If the EmDrive were proven to work as claimed, it could revolutionize space travel by providing a highly efficient means of propulsion. Potential applications include satellite station-keeping, deep space exploration, and even interstellar travel. However, given the current lack of conclusive evidence supporting its operation, these applications remain speculative.

Related Pages

• Reactionless drive
• Conservation of momentum
• Newton's laws of motion
• Microwave
• NASA
• Satellite

See Also

• Breakthrough Propulsion Physics Program
• Spacecraft propulsion
• Interstellar travel

References

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