hello frnds. this is m first quadcopter. but it won't fly, i think the esc are not calibrating. when i provide throttle all four motor starts. but after few sec one or two motor start rotating fast.  

plz suggest me what to do???

calibrate the escs. u can find videos on how to calibrate escs using kk board its simple.all the four motors has to start at once, if there is a delay then the problem is with esc calibration. do it first then reply.

i already calibrate my esc many times but it won't work

i also take help of my friend (he is in this field from last 14 years ) he also told me that esc are faulty. esc are not calibrating. can any one help me. which thing is faulty. esc or board 

check out this link

ok. first of all remove the props while calibrating the escs. Remember  safety is the first aspect u shd consider whether ur flying or setting. now as of I ve seen ur not doing the calibration in the right way. while calibrating the kk board u must hear a sound, tat I din found in ur video. I suggest u start the setup of ur fcb from scratch. but first remove all the props. there is a very nice video over youtube over how to setup the kk board. u take a pen n  paper more down ask the steps then try to setup ur quad.lets se wat happens.

thanx sir, let me find video on youtube then i calibrate. if it works then ill post

okay bro no prob anytime.

I ll try to get tat link got u.

maybe this ll help u out

miginstruments sir,

i did as u say. but the same problem persist.

maybe one of the esc is faulty. u can do one thing, there is a method of calibrating individual esc try to do tat. maybe u ll come to know bout the prob.

ok sir

hey bro dont cal me sir.