Electric Table Fan

I have problems with school project that I can not increase the speed of my fan. I want to try on a rheostat, but my school did have something that suits the supply voltage. it is dangerous too. Please help me

The fan speed is the proposal of poles and frequency, because the change can not you, or you will not be able to change speed

Type shooting in the dark here, but here goes ... nothing.

Say you need a flow of cooling air. But the fan does not give you enough. So you want to increase its speed. A rheostat will not help, at best it will slow the fan down. And you're right, messing with the line voltage is dangerous.

Try to concentrate production on what fan you need to cool or blow. A cone shapped piece of card should be the case with the large end of cone-driven fan and glued on the small end pointing in which you want to blow ..