HK Turnigy 1015 Inrunner 11500kv

[Anakin]

Hi, I'm new to multi copters and want to build a small tri-copter to fly indoors in very small space (bedroom / office)

I'm aiming at a very light 3D type tri.. possibly AUW of much less than 100g.

I see it's suggested that one use low KV motors.. why is this? Would a 11500Kv motor not work at all? I have a bunch of these motors http://www.hobbyking.com/hobbyking/store/uh_listCategoriesAndProducts.asp?idCategory=64&curPage=16&v=&sortlist=W&LiPoConfig= and will need to run them with GWS-2508 props as this is the only props I could find that fit these tiny shafts (1mm)

any advice will be much appreciated

[gompf-2]

Hi,

no, they won´t work at all. You woud have 30.000 rpms on the shaft on a single lipo. Way to much, even for this small prop. As the motors won´t supply enough torque to turn the props with this speed the mismatch of engine/propeller is very bad and you´ll mostly produce heat.
I suggest you to have a look at http://www.motocalc.com. The database consists of far bigger engines/props but you can get an idea of motor/prop/accu matching if you just play around with the values.
To make it perfect the power curve/characteristic of the whole drive (prop/motor/accu) shoud fit to the copters weight/frame dimensions but leave this for later. As a startpoint it shoud hover at half throttle so you need at least 2/1 thrust/weight ratio

Regards,
gompf

[Anakin]

Ok thanks Gompf, I think I get the idea.. what props and escs would you suggest for this motor http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=11887 HobbyKing 2402 Brushless Outrunner 2350kv.. obviously for a bit larger tri-copter