Vary Speed - Xoar Coaxial 47 and 40 inch prop

Posted by Baiyun Tang on 2019-03-12 19:44:57

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RCbenchmark staff


Thrust stand information

Device
Series 1780
Rotation speed sensor: optical probe, with 1 reflective tape

Software
RCbenchmark app version: dev-1552310313406-1.1.6-RC
Firmware version: 2.8

Test script
Script: Series 1780 coaxial steps v1  
Log:

ESC A/B init values (µs): [1000, 1000]


Plots
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Propulsion system (powertrain) 1/2
Components

Data samples
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Derived data
      Electrical power = Voltage × Current
      Mechanical power = Torque × Rotation speed
      Motor efficiency * = Mechanical power / Electrical power
      Propeller efficiency = Thrust / Mechanical power
      Powertrain efficiency = Thrust / Electrical power

*  motor and ESC efficiencies are combined.

Propulsion system (powertrain) 2/2
Components

Data samples
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Combined multi rotors data
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Combined multi rotors data
      Combined thrust = Thrust A + Thrust B
      Combined electrical power = Electrical power A + Electrical power B
      Combined mechanical power = Mechanical power A + Mechanical power B
      Combined motors efficiency = Combined mechanical power / Combined electrical power
      Combined propellers efficiency = Combined thrust / Combined mechanical power
      Combined overall efficiency = Combined thrust / Combined electrical power


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