International Journal of Aerospace Engineering / 2016 / Article / Tab 5

Research Article

Study on Helicopter Antitorque Device Based on Cross-Flow Fan Technology

Table 5

Summary of the measurement uncertainties.

ParametersUncertainty

Force balance (kg)±0.03%
Data acquisition resolution±0.05%
Free stream velocity (m/s)±0.5%
Free stream deflection angle (°)±0.1%
Model installation angle (°)±1%
Rotor collective pitch angle (°)±1%