Motors and Propeller choosing guide

[Archangel]

Hi friends,

I want to make a quadcopter of weight 1.5-2 kgs weight approx. And I am Thinking of using the following motors and propellers. I wanna know if it is enough..

Emax GT2215/09 Brushless Motor ( http://www.aliexpress.com/item/Emax...hrust-1100g-KK-MK-Multi-copter/578635184.html )

30A SimonK Prgramme RC Brushless ESC With BEC 3A ( http://www.aliexpress.com/item/4pcs...copter-Multicopter-Wholesale/32225789649.html )

F05304 10x4.7 3K Carbon Fiber Propeller CW CCW 1047 ( http://www.aliexpress.com/item/F053...Props-Blade-For-RC-Quadcopter/1628786201.html )

Also i Want to know why some motors cost so much? Is it because of the difference in technology or is there any more advantages?

 

[holtneil]

Hi mate the motors are to fast for 10x4.5 props as they go over 1000kv the props size should get smaller , so look for up to 1000kv on the 10x 4.7 prop
I did look at the spec and I know it says it ok but I had 1200kv on a quad of your weight and flight time was 3mins on a 2200mah , so your going to need a very big battery like a 5200mah 3 cell to get any sort of flight time and that battery is not light
These look good
http://www.aliexpress.com/store/pro...tor-Multi-rotor-Version/206605_628435901.html

 

[Archangel]

Thank you for replying. One question what is the estimated Fight time of the Motors you suggested?
Also what's the difference between the motor you suggested and the one i am using? Any preference with what propellers I should use?

 

[holtneil]

Hi mate use this to work out flight times www.ecalc.com , this will let you try different set ups , normal a low KV with big props give you a better flight time FPV quads and long flight for 500+ size , High kv small props give you a short flight but fast 250 racing quads 5 mins race time 2300kv and a 1300mah 4 cell , if you look at the DJI phantom it has 950kv motors 2200mah 3 cell battery and will fly for 15 mins