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Vehicle Sizing PDR

DR 2. Vehicle Sizing PDR. Presented by: Mark Blanton Chris Curtis Loren Garrison September 21, 2000 Chris Peters Jeff Rodrian. DR 2. Vehicle Sizing PDR. I. Preliminary Weight Estimate Historical Weight Database Weight Estimation

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Vehicle Sizing PDR

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  1. DR2 Vehicle Sizing PDR Presented by: Mark Blanton Chris Curtis Loren Garrison September 21, 2000 Chris Peters Jeff Rodrian

  2. DR2 Vehicle Sizing PDR • I. Preliminary Weight Estimate • Historical Weight Database • Weight Estimation • II. Preliminary Wing Loading and Power Loading Estimate • Explanation of Constraint Equations • Constraint Diagram • III. Aircraft Size Summary • Weight, Wing Area, Motor Horsepower Estimate

  3. DR2 Vehicle Sizing PDR • Historical Weight Database: • Wing weight per unit area set from 5 previous AAE 451 aircraft. • Aircraft used: • ’97 Fat Albert • ’98 Tow Plane & Glider • ’99 Red Team & Green Team • Wwing/Swing = 2.75 oz./ft2

  4. DR2 Vehicle Sizing PDR • Historical Weight Database: • Weight breakdowns from ’97 Fat Albert and ’98 Tow Plane used for estimates on: • Fuselage – 12.0% Gross Weight • Vertical Tail – 2.0% Gross Weight • Horizontal Tail – 3.0% Gross Weight • Miscellaneous*– 5.0% Gross Weight • * Landing Gear Struts, Control Rods, Hinges, Mounts, etc

  5. DR2 Vehicle Sizing PDR • Weight Estimation: • Payload Weight includes: • Tattletale 8 data logger, interface box, & cord • Pitot-Static Airspeed Instrument • Gyro • Power Supply Arrangements • Wpayload= 18.50 oz

  6. DR2 Vehicle Sizing PDR • Weight Estimation: • Fixed Weight includes: • Receiver & Receiver Battery • 3 Servos • 3 Foam Tires • Propeller • Speed Controller • Wfixed= 14.54 oz

  7. DR2 Vehicle Sizing PDR • Weight Estimation: • Motor & Battery • -AstroFlight 25G = 12.50 oz. • -14 cells @ 1.975 oz = 27.65 oz • Motor and battery weights equal to ’98 tow plane values which is assumed to be the approximate size of our aircraft.

  8. DR2 Vehicle Sizing PDR • Weight Estimation [oz.]: • Wings: 54.4 • Fuselage: 19.5 • Battery: 27.65 • Motor: 12.50 • Payload: 18.50 • Fixed Weight: 14.54 • Vertical & Horizontal Tails: 8.13 • Miscellaneous: 8.13 • Gross Weight: 10.2 lbs

  9. DR2 Vehicle Sizing PDR Drag Buildup:

  10. DR2 Vehicle Sizing PDR Drag Buildup:

  11. DR2 Vehicle Sizing PDR • Constraint Equations: • Loiter Velocity

  12. DR2 Vehicle Sizing PDR • Constraint Equations: • Sustained Turn Rate at rmax

  13. DR2 Vehicle Sizing PDR • Constraint Equations: • Climb Angle (g): Increase in drag due to flight angle

  14. DR2 Vehicle Sizing PDR • Constraint Equations: • Ground Roll Distance

  15. DR2 Vehicle Sizing PDR • Constraint Equations: • Stall Speed • where Vstall < 20 ft/sec

  16. DR2 Vehicle Sizing PDR Constraint Diagram:

  17. DR2 Vehicle Sizing PDR • Aircraft Size Summary: • Gross Weight • =10.1 lbs. • Wing Area • =19.7 ft2 • Wing Span • =8.9 ft. • Fuselage Length • =5.0 ft • Aircraft Horsepower Estimate • = 0.1 hp.

  18. DR2 Vehicle Sizing PDR Questions

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