Boatercycles (Jetskis) can be fast, depending on how immensely fat the person is, and depending on how much water there is and how fast the engine is designed to go
over Mach 1.4 (1400km/h) due to its jet engine and turbine.
very fast
There is no such thing as a jet train.
frank whittle invented the first super fast jet engine for the RAF. he also worked as an enginer in canada.
400
about 40mph
A helicopter is rather designed for hovering than fast moving. That is why they are used in rescuing and other purposes. A jet engine plane moves fast in the forward direction and they are designed for fast transport.
becase it is very fast and has a big engine
250 mile
9500 mph
366mph (516kph)