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> RECORD OBS-0403 | status: DEBUNKED | filed 2026-07-31
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EmDrive Reactionless Thruster

RecordOBS-0403
CategoryScience/Suppressed Tech
StatusDEBUNKED
SummaryThe EmDrive is a proposed propellantless spacecraft thruster that allegedly produces thrust from electromagnetic waves in a closed cavity, violating conservation of momentum. Proponents claim it could revolutionize space travel, but repeated experiments have failed to confirm the effect beyond measurement errors.
OriginProposed in 2001 by Roger Shawyer of Satellite Propulsion Research Ltd in the UK; later tested by NASA Eagleworks and others.
Claimed
  • The EmDrive produces thrust without expelling propellant, violating Newton's third law.
  • NASA Eagleworks measured thrust of 1.2 ± 0.1 millinewtons per kilowatt in vacuum.
  • The device could enable travel to Mars in 10 weeks.
  • The effect is real but unexplained by known physics.
Evidence / consensusThe apparent thrusts are measurement artifacts, likely due to thermal gradients or other external forces. Independent tests by Martin Tajmar's group at Dresden University of Technology refuted all EmDrive claims by at least three orders of magnitude.
> OBSERVER NOTE:
Another reactionless drive claim, filed under suppressed tech. The physics community remains unanimous: conservation of momentum is not negotiable. All positive results trace to systematic errors.

Sources

  1. EmDrive - Wikipedia
  2. The EmDrive, NASA's 'Impossible' Space Engine, Really Is Impossible
  3. The "Impossible" EmDrive Passes Peer Review | HeroX

Sources are external and provided for verification. Listing does not imply the Observer endorses their claims.