Hello friends.... im new here..
i want to make my own t copter. last year i tried to make one for my diploma project but failed due to wrong parts selection.....my t copter didnt lift off...
im prepaired again to make one need lot of help
i have some electronics from my last project and i brought some now.... list is as flollows...
1. k.k 2.1.5
2. 1200kv emax motors
3.20 Amp simonk flashed esc (Avionic)
4. flysky 6.4 Ghz 6 channel Tx andRx
5.1045 props
6.4200mah 7.4volt lipo battery
7.3D printed motor mounts and yaw mechanism
Reason of failure for my last project was very small motors i used 2800kv motor and too big battery it weighs around 300 gm
i have same battery now shall i change it with 2200mah 11.1v or contunue with this?
plz help i know some technical stuff but still a begineer..... thanks in advance...

I think this battery would be enough. But if you want to get more of  that 'punch' then go for 3s (11.1v)

is it the Emax 2822 motors? im sure their peak thrust is at 3S and a 2S may not be suffice!!

upgrade the lipo its for sure go with 3s thats 11.1v also pls clear out that which motors are you using 1200kv or 2400kv as you have mentioned different kv in your post also wat is the size of copter you are making that will decide the kv and props to be put on motor rest all parts are usefull and can be used in the copter