My friend has a 100cc scooter but without any clutch (I mean no gears), so does his scooter have a flywheel?

Rain1

hmmm.. well if its got no gears it should'nt have a fly wheel, flywheels are in the Clutch! so basicly no flywheels! Apr 20 06, 1:55 AM

Baloo55th

Other way round - clutch is on flywheel! Some automatics have a 'fluid flywheel' where a sort of propeller revolves in liquid instead of a mechanical connection, but at 100cc it won't have that. Too heavy. There will be a flywheel, whose function is to smooth down the jerky movement of the crank - to even out the power strokes. http://en.wikipedia.org/wiki/Flywheel It probably uses a belt drive rather like the old DAF cars did - http://en.wikipedia.org/wiki/Variomatic Apr 20 06, 2:19 AM

xfacilitatorx

It most likely has a centrifugal clutch. http://home.howstuffworks.com/chainsaw4.htm http://home.howstuffworks.com/chainsaw4.htm As for flywheels....the primary purpose of a flywheel is not for the clutch but for positive inertia. The flywheel is rather large and round and heavy so as to keep a positive spin on the motor. This increases the efficency and the "fluidity" of the power output. Apr 20 06, 6:59 AM

xfacilitatorx

Flywheel dynamics. http://en.wikipedia.org/wiki/Flywheel http://en.wikipedia.org/wiki/Flywheel Apr 20 06, 7:00 AM

Baloo55th

You didn't look at my first reference - beat you! If by scooter is meant one of those flat board things with tiny wheels and a tiny engine over the back wheel (like an unmotorised kids' one), yes, it will have a centrifugal clutch. As do chainsaws and lawnmowers. Those operations require basically an on/off power situation. Many motor scooters (of the Lambretta / Piaggio type) are fitted with Variomatic automatic transmission, while some still have centrifugals. But whichever type it has, it will have a flywheel, which is what the question was about. Even the pistonless rotary Wankel engine needs a flywheel, but the early real rotary aero engines didn't - the engine block was its own flywheel which cut down the weight to a manageable level for the planes of the time. Apr 20 06, 10:42 AM

xfacilitatorx

Neener Neener Neener! You win. Apr 20 06, 12:50 PM