Double clutching

[Steve Adams <adamsfam@batelco.com.bh>]

Double clutching came about because of non-syncromesh gearboxes.You
simply can't engage a gear properly on a non-synchro box without
matching engine revs to road speed for the particular gear you are
engaging. The point of releasing the clutch and engaging it again while
revving the engine is to allow the clutch plates to be spun up as well
to match the gear and crank speeds.

At least thats how it was explained to me! Probably someone out there
who knows better!!