http://www.howcast.com/videos/174365-Aerolabs-FPG9-How-To-Make-a-Foam-Airplane-Out-Of-a-Paper-Plate

What ir esc and bec and do we use a motor directly to rx without a esc/bec?and how to rotate a servo continously for driving a heavy rc tank ? Thanks

Hello Tanmay..
Please spend some time reading: http://www.rcindia.org/rc-india-forum/the-rc-india-gems/
Hope you will find all your answers and many more things as well.

y ru using the servo. is it to drive the tank.

Hi Tanmay,
For driving a heavy RC tank you need DC geared motors instead of servo motors. DC geared motors will give you required torque. What is the weight of your tank. Also, you need to design something that could control your motor through RC.

Thanks. The link was helpful and the weigh is more than 1.2 kg the size ìs about 15 x 10x 9 cm the r lbh respectively