Patrick Dempsey Bridget Fitzpatrick Heather Garber Keith Hout Jong Soo Mok

ORION AEROSPACE Preliminary Sizing PDR 26 September, 2000 Patrick Dempsey Bridget Fitzpatrick Heather Garber Keith Hout Jong Soo Mok

Team ConceptBiplane Configuration ORION AEROSPACE  Square Fuselage  Rectangular WingsConventional Swept Tail Tail Dragger

ORION AEROSPACE Aircraft Specifications

ORION AEROSPACE Equipment Storage Equipment Volume(in3) Gear box 3 x 1.5 x 1 Motor 2.25 x 1.5 Speed Controller1.5 x 1.25 x 1 Receiver 1.75 x 1.25 x 0.75 Gyro 1.5 x 1.25 x 1.25 Data Recorder 1.75 x 2.25 x 3.25 Battery(20) 2 x 1 x 1 Servo 1.5 x 1.25 x 0.75 Interface 1.25 x 3.5 x 5.75

ORION AEROSPACE Equipment Storage

Biplane Pros: Cons: ORION AEROSPACE Concept Description Biplane Configuration Pros: Cons: ---------------------------------------------------------------------------------------------------- Shorter Wing Span Wing Interference Increase Turn Clearance Accessibility of Equipment Increase Roll Rate Maneuverability Transporting Less Need For High Lift Devices Decalage Provides Natural Stall Recovery Less Need For High Lift Devices Induced Drag Decalage Provides Natural Stall Recovery Accessibility of Equipment

ORION AEROSPACE Concept Description Square Fuselage Pros: Cons: ---------------------------------------------------------------------------------------------------- Ease of Construction Aerodynamics Strong Bending Weak Twisting Equipment Storage Rectangular Wing ---------------------------------------------------------------------------------------------------- Ease of Construction Aerodynamics

ORION AEROSPACE Concept Description Conventional Swept Tail Pros: Cons: ---------------------------------------------------------------------------------------------------- Stalls at High Angles of Attack  Construction Tail Dragging Landing Gear ---------------------------------------------------------------------------------------------------- • No Extra Control System Necessary For Nose Gear

ORION AEROSPACE SIZING and WEIGHT ESTIMATION METHOD -Set motor weight and properties -Set flight parameters -Use historical data to calculate initial Wto -Iterate to obtain wing area and Wto -Use S and Wto to build drag model -Use drag model to evaluate energy (each stage) -Find new battery weight based on energy required -Re-iterate S and Wto until values converge

ORION AEROSPACE HISTORICAL DATABASES

ORION AEROSPACE Constraint Equation Endurance take derivative and set =0.

ORION AEROSPACE Constraint Equation Rate Of Climb

ORION AEROSPACE Constraint Equation Turning (Thrust)(Velocity)=Power

ORION AEROSPACE Constraint Equation V-Stall Lift~Weight

ORION AEROSPACE Constraint Equation Cruise

ORION AEROSPACE Constraint Equation Take Off

ORION AEROSPACE Constraint Diagram

ORION AEROSPACE Questions?

Patrick Dempsey Bridget Fitzpatrick Heather Garber Keith Hout Jong Soo Mok