
thumb|Gyrobus G3 (built in 1955), the only surviving gyrobus in the world in the Flemish tramway and bus museum, Antwerp A gyrobus is an electric bus that uses flywheel energy storage, not overhead wires like a trolleybus. The name comes from the Greek language term for flywheel, gyros. There are no gyrobuses currently in use commercially.
thumb|Gyrobus G3 (built in 1955), the only surviving gyrobus in the world in the Flemish tramway and bus museum, Antwerp A gyrobus is an electric bus that uses flywheel energy storage, not overhead wires like a trolleybus. The name comes from the Greek language term for flywheel, gyros. There are no gyrobuses currently in use commercially.
==Development== The concept of a flywheel-powered bus was developed and brought to fruition during the 1940s by Oerlikon (of Switzerland), with the intention of creating an alternative to trolleybuses for quieter, lower-frequency routes, where full overhead-wire electrification could not be justified.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).