In article , Dave Plowman (News) wrote:

Yes. A planetary gear may be changed under full power with no distress -
car autos have been doing this for years.

A car type synchromesh system wouldn't last five minutes without the
clutch.

Really? Do you mean you need a 'crash' gearbox to be able to do clutchless
gearchanges like you can on a motorbike?
I'd assumed that a synchromesh gearbox would make it even easier, but then
I have no idea how synchromesh works. (I do know about epicyclic gear boxes.)

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Jan