eXperiments wid a DC motor– toy helicopter–how do i fly it?

Well, i have made a helicopter with a 6V DC motor connected to 2 9v batteries in series, giving a total output of 18v. the motor works fine and rotates fastly..
i then connected an old aerofoil-shaped rotor with 3 leaves which used to be of a flying helicopter….
but after that i connected it, i found that motor is rotating fairly slowly than it used to be……
and hence my helicopter is not flying….
what should i do more to make it fly??

plz….plz….plz…help me plz….i dont want any RC controls or anything…i jst want to make it fly….plz….plz….plzzzzzzzzzzzzzzzzzzzz……………..
noone?? plz…help me…
will it do if i use gears?? or if i use 4 6v motors on a panel or something??

plz help me…

Sounds like your motor is too small to do the job, since you say it works until you put a load on it. Be sure the blades are balanced of course, but beyond that, I'd try to measure the current with the blades at minimum tilt, then measure the current with the blades tilted slightly, again with the blades tilted more…if the current each time is more than it was the previous time, then clearly it's the tilt of the blades that's producing the load…fully tilted rotors will create too much current, and the motor won't do the job.

Do some research. read up on one of the r/c kit helicopters, see how much current/power they use. Compare that to your machine.