Wet & Dry clutch-what are those

A 'wet clutch' is immersed in a cooling lubricating fluid, which also keeps
the surfaces clean and gives smoother performance and longer life. Wet clutches, however,
tend to lose some energy to the liquid. A 'dry clutch', as the name implies, is not bathed in fluid. Since the surfaces of a wet clutch can be slippery
(as with a motorcycle clutch bathed in engine oil), stacking multiple clutch disks can compensate for slippage.

A "wet clutch" is immersed in a cooling lubricating fluid which also keeps the surfaces clean and gives smoother performance and longer life. Wet clutches, however, tend to lose some energy to the liquid. Since the surfaces of a wet clutch can be slippery (as with a motorcycle clutch bathed in engine oil), stacking multiple clutch disks can compensate for the lower coefficient of friction and so eliminate slippage under power when fully engaged. A "dry clutch", as the name implies, is not bathed in fluid and should be, literally, dry.