I am going to make a quadrotor. For that purpose I have searched internet a lot. My budget  is about 8000-10000 and I want to make small quadrotor  about 330-450mm size. I have found that in various websites there are different rate of different parts.
Shop              Parts               Quantity                               Price                     Total
RcDhmaka   Emax2822 BLDC             4                               595                      2380

RcDhmaka   Hobbywing Skywalker
                20A Brushless ESC
                                             4                                659                      2636
RCBazaar   KK MultiCopter V5.5
                with programmer &
                  distribution board
                                            1                               1,700                      1,700
RCBazaar   Quadcopter propellers
                      8 x 4.5 (black)
                                           2 set                                110                        220
                                                                                                      total       6936

I already have Lipo battery , HK tx-rx set, Velcro strip etc.
I want to make the frame myself with aluminum rectangular sticks. But I cannot understand what is the relationship between prop size and all over weight and the dimension of the frame.
     Is there any mathematical formulation behind it. I think obviously it has.
Though I have mentioned above about the motor, but I don't know whether it is suitable for this purpose or not. If not plz suggest me.

Please give me a call i can help you build your quad
7678013993

I even have arf kit for sale if interested 

Regards
Chintal
Rcmumbai.com

use 10" props not 8"

while making a customized multirotor please keep in mind what is your  auw weight and what is the maximum thrust produced by the motors (totalling all four if a quad)
the total thrust produced by the motors divided by 2 has to be your max auw
that is a basic formula

and if you are looking for greater flight time
lower kv motors
bigger props while keeping the g/win mind   should be above 11
then get a decent flight time
it again depends on how good the frame/balanced props/material used /motors/esc/batt mah to weight to  ratio is

the output that you will get is a fast and powerful multirotor(depends on flight control board  used and its pid settings ) where motors dont get hot (warm is ok )
and a decent flight time of 15 to 20 mins.....

hope this will help
Happy Flying

Regards
Chintal
Rcmumbai.com

what is fcb and pid?
how can I measure the motor efficiency or is it supplied with the motor manual?

sorry for using shortcuts
fcb=flight control board
pid= you can refer to this http://www.rcgroups.com/forums/showthread.php?t=1375728

just an example of a good quality motor's thrust chart

Many many thanks Chintal for your help. If I get any problem i'll contact with u. your website is not opening now. can get quad parts within my budget from u(8000-10000)?
with regards
avigyan

In the for sale section of forums i have put up all products with price
My site is under construction still

Chintal which motor chart is that?
Can you please pm me the details?
Is that of ldpower?
With 15inch prop 960gms with 4amp is awesome:o
I need some

Arun bro thats for SunnySky 4112 320kv

http://www.aliexpress.com/store/product/SUNNYSKY-X4112S-320KV-Outrunner-Brushless-Motor-for-Multi-rotor-Aircraft-free-shipping/809715_714584899.html

You can pre order these motors
All sunnysky v series motors are if such quality

My god that chart is not correct I have 6 of the same motor with 15 inch props running and with 6s
Never able to get those result..
May be hk amp meter having some problem.. >

How is that possible ?
A fake chart ?