Aerodynamics and Design for Ultra-Low Reynolds Number Flight

Chapter 5
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FIGURE 5.10 Large test fixture in thrust pendulum configuration.
5.4 Discussion of Experimental Error
The various test fixtures and methods used for thrust and power required testing have
been developed to be as simple and straightforward as possible, but there are still
potential sources or error that should be described and their impact on the measurements
assessed. The sources considered are the motor power supply, determination of rotor
RPM, the electronic balance, errors due to the geometry or construction of the fixtures,
and aerodynamic blockage effects. The geometric accuracy of the rotors themselves is
considered separately.