I am planning on building my first rc plane , it would be an EDF plane with 70mm edf unit , the amount of thrust I want from it should be between 800g - 1200g ( could be more but then i hv to use 5s-6s lipos dont wanna do that ).
I need to know what would be the right motor for it a 1400kv , 2800kv , 3300kv or something else ??
Estimated plane weight near about 650g-700g

i dont want to use more than 4s lipo on it , can someone help me
the EDF UNIT:

http://www.hobbyking.com/hobbyking/store/__11164__EDF_Ducted_Fan_Unit_6Blade_2_75inch_70mm.html

 my plane design would be similar to the attached pic ( similar not exact , just reference )

A first plane should be more of a high wing trainer rather than an EDF jet . EDF's are very tricky to fly , I suggest you try building a trainer model instead .

no no im not gonna fly it i just want to build it , i hv a friend he is an excellent flyer he will fly it , he has many trainer planes ( bought from Art-Tech ) , currently  i m flying his slowstick , im just a rookie at flying
i just want my plane to be crash proof ( seen many ppl break there propellers on landing ) , in EDF the roter and propeller is on safe side as it is covered .

i have edf motor 4600kv from hobbyking.

4600kv how many lipos will it take to run it ?

2200mah,,11.1v.   3c

just single 3s , i wont be able to buy it before mid of april , some $$ prob.

Having a pusher config similar to the AXN jet may help you save your propeller