DIY ROV thruster superior performance 4,78 kg (10.5 lbs) (46.5 N)

http://www.rovthruster.com
DIY ROV thruster from DT700 brushless motor.
Homebuilt rov thruster testing props.
3D printed Kort nozzle.
http://www.instructables.com/id/ROV-T...
Thrust: 4,78 kg (10.5 lbs) (46.5 N) at 12V.
Efficiency: 52 g/w (1.83 oz/w)
Specifications:
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Tested forward/reverce thrust at 12V
0.8A - 0.5/0.5 kg (1.1/1.1 lbs)
2A - 1.0/0.9 kg (2.2/1.98 lbs)
3A - 1.35/1.2 kg (2.98/2.65 lbs)
4A - 1.65/1.5 kg (3.64/3,31 lbs)
5A - 1.9/1.7 kg (4.19/3.75 lbs)
10A - 2.5/2.1 kg (5.51/4.63 lbs)
14A - 3/2.7 kg (6.61/5.95 lbs)
19.5A - 4/3.8 kg (8.8/8.38 lbs)
25A - 4,78 kg (10.5 lbs) (46.5 N) more than Blue Robotics T200!

Efficiency at 12V (g/W) (lbs/W)
at 1A: 52 g/w (1.83 oz/w) more than Blue Robotics T200!
at 2A: 41 g/w (1.44 oz/w)
at 3A: 37 g/w (1.3 oz/w)

How to build a ROV? Just choose the best inexpensive thruster!
https://www.ebay.com/itm/ROV-thruster...
https://www.amazon.com/ROVthruster-RO...