VTOL Y3 project

ArduPlane VTOL Plane
1

Hi guys! My name is Fede. Nice to meet you all at this awesome community.

I am new in the RC world, and I am starting with a big project: I want to build a Tri-motor Tilt Rotor VTOL. Some specs:

  • Frame: Volantex Ranger 2000
  • Target MTOW: 6 kg.
  • Target flight time: 2.5 hours.

Doing some research I chose SunnySky X3520 KV520 motor with 14x8 props. The specs of this combination are:

Table
Table916×472 28.3 KB

I calculated an 0.6:1 thrust-to-weight ratio to choose the motors (cruise). So for a weight of 6 kg, I estimate a 3600 gf divided by 3 motors = 1250 gf per motor. According to the table above, I will have a current draw of 7.8 A and 174 W per motor (23.4A 522W total).

But on the other hand, I read a rule of thumb of 100W per 1 pound (13 pounds = 1300 W), so I am a little bit lost.

I would appreciate your help to understand the current draw and power consumption in order to choose the correct battery for the target flight time (6S).

Thanks in advance, best regards

2

Hi Fede, I have the Ranger2000 and my MTOW is 2.5kg. I do not think it will fly very well at 6kg if it would fly at all!
On the other hand, when you size your motors for a vtol, take into consideration that you need to lift that vertically, so you need a power system able to lift at least 10kg for a MTOW of 6kg. The closer you are to 2:1 thrust the better your chances to make it work!

Good luck!