11.0 Weight Justification & Analysis 11.1 Detailed Weight Analysis A detailed weight analysis (Class II 50) collaborates the methods established by Cessna 51, the United States Air Force, General Dynamics, and Torenbeek 52 to accurately project the weight of the aircraft by verified methods based on geometry of the airplane 53. However, the versatility and utility of these methods are not without faults. Specifically, these methods are overly general and are best applied to standard aircraft configurations and fall short when applied to aircraft with unconventional characteristics like Honey Badger, e.g. high aspect ratios, wing folding mechanisms, and heavy use of composite materials. For example, the Cessna weight methods predicted an overly large value for the wing weight that contradicted common sense. Due to this deficiency, UACC later pursued a Class III part-by-part weight estimation that broke down the design of Honey Badger into an appropriate custom weight estimation. Table 9 presents the results of the Class II weight estimation. Table 9 Summary of Class II weight estimation
Wing Horizontal Tail Vertical Tail Fuselage Nose Landing Gear Main Landing Gear Structure Propeller Propeller Motor Battery Propulsion System Power Plant
Cessna Method (lb .) 130 28 10 139 8 35 349 ------136 ------------136
USAF Method (lb. ) 148 27 8 103 1 2 289 -------------------------------
GD Method (lb. ) ------------------------------------------33 ------------25 58
Torenbeek Method (lb.) 156 ------------------28 73 257 33 130 ------23 186
Average Values (lb. ) 126 26 8 143 14 43 361 31 66 160 23 279
Air Induction System Flight Control System Avionics Electrical System Cooling Furnishings Other Items Parachute
------27 ------43 ------34 -------------
------108 ------85 33 -------------------
-------------------------------------------------
1 32 66 39 5 31 5 -------
1 47 43 47 15 25 3 33
Fixed Equipment Empty Weight Maximum Takeoff Weight
104 -------
226 -------
-------------
178 -------
214 854
-------
-------
-------
-------
1,254
Weight Component
65