Comprehensive System Identification of Ducted Fan UAVs - Cal Poly

Table 3.11 shows that all of the dimensional derivatives for the 29” vehicle arelarger than the 9” values. This is to be expected because the larger vehicle shouldexperience larger forces and moments to go with its increased mass and inertias. It alsoshows that the flight test and wind tunnel results are all of the same sign and fairly close.The only exception is that of the difficult derivative M u . Wind tunnel testing revealed amuch smaller value for this critical derivative (0.003) than the flight test (0.5014).- 45 -