Actual performance data for your choice of components
Theoretical calculations are useful for obtaining an estimate of performance prior to committing to components. In practice, manufacturing variations and real-life conditions will impact on those estimates. At Skyborne we have gone through that same process multiple times and designed our in-house data acquisition system to obtain real performance data not available anywhere else.
Our system is flexible and can accommodate propellers up to 22 inches and measure up to 12kg of thrust. Complimentary propeller balancing is offered with every order. Data is averaged across 3 tests to ensure no outliers are present and the results processed before delivery. Read more about our system here
Just like a helicopter needs a tail rotor, propellers will produce a reaction torque that will be transmitted through the motor housing. For a quadrotor this is largely irrelevant because two propellers spin in one direction and two spin in the opposite direction. However, most other types of vehicles will require reaction torque data for vehicle and control systems design.
A second load cell perpendicular to the thrust measurement direction provides this data directly.
Motor impulse data
Impulse testing measures the time taken for a signal sent to the motor to result in stabilised measured thrust. This data is crucial for conceptual vehicle designs and later for tuning control systems. The smaller the motor impulse, the faster the response time for a UAV to reject disturbances (i.e. turbulence) and the faster the control system can act (higher gain and phase margins).
Wind tunnel integration
At angles of attack above zero, thrust measurements need to be taken in two axes in order to determine both thrust components and the reactionary torque produced. This torque is not easily calculated analytically and is more accurately measured through testing. Our data acquisition system can be mounted inside a wind tunnel for flight test data. We have access to the low-speed wind tunnels located in Brisbane.