What this work contributes
A dedicated balance tested asymmetrical laser resonators, reflective cavities, and fiber-optic loops at nanonewton sensitivity. No net thrust was resolved for those devices, making the paper directly relevant to claims that cavity asymmetry or resonant enhancement alone creates propulsion beyond ordinary photon recoil.
Where the evidence stops
The constraints apply to the laboratory geometries and powers studied; the publisher identifies a May 2021 correction, so use the updated article rather than an older copied manuscript.
Original source
O. Neunzig; M. Weikert; M. Tajmar. Thrust measurements and evaluation of asymmetric infrared laser resonators for space propulsion. Technische Universität Dresden (2021).
First online: 2021. Journal issue year: 2022.
Source date: 2021-04-24.
DOI: 10.1007/s12567-021-00366-4
How we use it
This record belongs to Measurement & replication. Its evidence label describes the cited work, not the maturity of a Metric Flight device. Follow the original methods, corrections and conditions before transferring a result to a different geometry or scale.
Editorial note reviewed 19 October 2026. AI assisted research discovery and synthesis. Citation metadata and claims were checked against primary publication or institutional records; full-text access varies. Read the source for the complete method.