How to calculate coefficient of drag for a particular shape? While working on my project I gave my RC plane's nose a particular shape. It doesn't resemble any simple shapes for which coefficient of drag is provided on Internet. 
I don't know simulations.  Also I don't have any wind tunnel facility for my project.  So is there any other way,  any website or any formula for computing coefficient of lift and drag?
There are essentially only two ways to do this. 

First you can build a wind tunnel, run experiments and measure the forces involved.

The second is to run a computer simulation. There is software that will do this, but it is complex professional grade engineering software. Free applications are available, but I can't vouch for their effectiveness. You can search for "computational fluid dynamics software" to find options. Adding "free" to that will find you a few cost-free options.

Be aware that setting up and using this software is a complex task that involves creating a CAD model of your shape. You can definitely do the calculation if you are interested, but it's not a simple or quick task.