Im going to buy pitts 30cc v3 from rcdhamka can any one help me to choose servo for it and how many servo?

Congratulations - a beautiful model!

The best thing would be to ask RCD themselves - Sanjeev or Karthik Shah. They will guide you well

Do you have his contact number

What a question! You are going to buy from them, and asking me their number?

I am not Google

Go with Hitec 5645 or equivalent on all surfaces. You will require 4 for ailerons, 2 for elevator (one for each half), one for rudder. Making 7 servos for all the flying surfaces.
Apart from this one for throttle. I prefer to use a standard non digitial on throttle.
That makes it total of 8.
Rest is up to you, if you want to install Tx operated choke, and other uses that you may think of.
Min 8 servos required.
Also be adviced, this is not a beginers model, and requires good amount of time at the field to assemble and disassemble each time.
The top wings are glued as one piece, and bottom is two piece.
Here are a couple of picture of my Pitts    

A very sincere advice for the OP, please post your questions here so that it could help others who might be looking for the same information.
And going by your PM's I would suggest you do not purchase this model. Not for you as of now

Servo you suggested is expensive and what is that tx operated choke?

Tx operated choke is when you operate choke from your Transmitter (Tx). As for servo cost, I can't help with that. 

Quote from: sanjayrai55 on June 26, 2015, 01:43:00 PM
What a question! You are going to buy from them, and asking me their number?

I am not Google

 

Go for the JR 8911 servos for 3d and the 5625 servos for normal flying. If you are on a budget, get 625mg which is the analog version of the 5625mg

Ameyam