In my quest towards getting better efficiency and more performance/flighttime out of my power systems , I decided to build myself a “Thrust stand”.
This contraption is going to be quite simple;
2 pieces of wood which I pre-drilled
Since I had a box of old T-Rex 450 parts I decided to use the main-shaft and bearings
Screwed on a baseplate
I screwed on a simple stopper to keep the arm from tilting forward when transporting it
Done! The motor mount was constructed from a piece of aluminum I had laying around.
The power-meter is of the Turnigy brand and has a built in PWM generator which means that you don’t need a transmitter+receiver to run the tests.
The RPM meter requires a non florescent light source to do accurate readings. I use a LED flashlight to achieve that.
Overall I’m very happy with my thrust stand. It’s a great tool for comparing performance between setups and maximizing efficiency.
Here are some test results that I took for the FunJet setup;
Motor: Warp 4 3-turn 2580kV
ESC: Mystery 40A
Battery: 3s OEM 25-35C 2200mAh LiPo
APC SPEED 400 – 4.75*4.75
Calculated pitch-speed: 180km/h
APC SPEED 400 – 5.25*4.75
Calculated pitch-speed: 166km/h
APC SPEED 400 – 5.5*4.5
Calculated pitch-speed: 156km/h
APC SPEED 400 – 6*4
Calculated pitch-speed: 134km/h