Vehicle Sizing PDR AAE451: Balsa to the Wall Ashley Brawner Matt Negilski Neelam Datta Mike Palumbo Xing Huang Chris Selby Jesse Jones Tara Trafton
Presentation Overview Preliminary weight estimate Wing loading and power loading Summary of sizing
Preliminary Weight Estimate Fuel fraction estimation method Analyze energy requirements for each mission phase to obtain phase battery weights Normalize sum of phase battery weights with unknown aircraft weight Find intersection of historical data with line created from estimation
Preliminary Weight Estimate
Preliminary Weight Estimate Assumed Parameters L/D_max 14 L/D_loiter 12.124 V_loiter 50 [ft/sec] Loiter time 8 min Turn time 4 min SLUF time Aircraft weight: 5.42 lbs Battery weight: 0.265 lbs
Wing and Power Loading
Wing and Power Loading Design point: Wing loading: 1.26 lbf/ft^2 Power loading: 3.0 lbf/hp Assumed Parameters CL,max 1.2 - 1.8 L/D 12 - 14 Climb Angle 45 [deg] V_stall 30 [ft/sec]
Wing and Power Loading Stall constraint: Cruise constraint:
Wing and Power Loading Climb constraint:
Summary Weight estimate: 5.42 lbs Wing area: 4.3 ft^2 Motor horsepower: 1.8 hp
Summary Weight estimate: 5.42 lbs Wing area: 4.3 ft^2 Motor horsepower: 1.8 hp
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