Critical Design Review AAE490 Project 1 March 2003 - PowerPoint PPT Presentation

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Critical Design Review AAE490 Project 1 March 2003

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  1. Critical Design Review AAE490 Project 1 March 2003 Nicholas Baker Brian Chernish Andrew Faust Doug Holden Mara Prentkowski Nicholas Setar

  2. Design Requirements Last Semester’s Design Walk around Landing Gear Fuselage Wing Horizontal Tail Vertical Tail Avionics Pod Engine Radio Instillation Color Scheme Overview

  3. Design Requirements & Objectives Maximum weight < 55 lbs Cruise speed > 50 ft/sec Stall speed < 30 ft/sec Climb angle > 5.5° Operating ceiling > 1000 ft Flight time > 30 minutes Payload of 20 lbs in 14”x6”x20” pod Carry pitot-static boom Spending limit < $300 T.O. distance < 106 ft (~60% of McAllister Park runway length) Rough field capabilities Detachable wing Easy construction

  4. Aircraft Walk Around Wing Span = 14.4 ft Wing Chord = 2.9 ft A/C Length = 10 ft T-Tail – NACA 0012 Pusher Internal Pod Tricycle Gear Low wing – Clark Y

  5. Walk Around

  6. Landing Gear • Nose Gear • Mounting Hardware • Main Gear • Mounting Hardware

  7. Nose Gear • Fults Tooling Dual Strut (RF800) • Mount: 1/4” plywood bulkhead • Weight: 9 oz • Cost: $33.94 • Servo Actuated for steering

  8. Main Gear • Carden Edge 540 40%CE54040 • Mount: 1/4” Plywood • Weight: 23 oz • Cost: $89.95

  9. Fuselage • Size • Materials/Construction • Articles that Mount to Fuselage

  10. Fuselage • Outer Fuselage • 1/8” Plywood Formers • 1/4” x 1/4” Balsa Stringers • 3/32” Balsa Sheeting 4-6 lbs/ft3 Contest grade • Keel • 1/8” Plywood Formers • 1/2” x 1/2” Basswood Stringers • 1/4” x 1/4” Balsa Truss • 3/32” Balsa Sheeting 4-6 lbs/ft3 Contest grade

  11. Fuselage • Things that attach to the keel • Nose Gear • Main Gear • Wing • Horizontal/Vertical Tail • Engine Nacelle • Nose Cone

  12. Fuselage Nose Cone Attachment/Removal

  13. Wing • Size • Materials/Construction • Wing Mounting

  14. Wing • Size • The wing was sized to the following constraint Where; • W = 53 lbs • Vmin = 30 ft/sec • CL = 1.19 • r= .002309slug/ft3 S = 41.7 ft2

  15. Wing • Materials • 1/8” Balsa Ribs • 1/8” Plywood Root Rib • 1/2” x 1/2” Spruce Spare (2) • with 1/8 balsa shear web • Leading and Trailing edge stock • Aluminum Main Spar 2024 T3 • 3/32” Balsa Sheeting 4-6 lbs/ft3 contest grade

  16. Wing Mounting • Wing is Plug in style • Main Spar stays in plane • Wings Panels removable for ease of transportation and maintenance • 2 Anti-rotation bolts keep wing attached

  17. Wing Aluminum Wing Spar • 2024 T3 Aluminum Tube • 1.75” Diameter • .049” thickness • 46” Length • 5 degree dihedral angle • To get proper location of wing

  18. Horizontal Tail • Size • Materials/Construction • Horizontal Tail Mounting

  19. Horizontal Tail Size • Assume cg is locate at the quarter chord • Assume ηh = 0.9 • ARwing = 5 • Swing = 41.7 ft2 • ARh-tail = 3 • Find: Sh and AR => bh and ch

  20. Horizontal Tail • xc/4 = 0 ft ≈ xcg • Static Margin = 15% • SM = (xac – xcg)/c • Solve for xac • xac = 0.435 ft

  21. Horizontal Tail Roskam Eq. 3.18 Raymer Fig 16.12 Roskam Figure 3.3

  22. Horizontal Tail Results • Sh = 8.5 ft2 • bh = 5.051 ft • ch = 1.683 ft

  23. Horizontal Tail Materials • 1/8” Balsa Ribs • 1/8” Plywood Root Rib • 3/4” x 3/8” Bass Spar (2) • Machined Ribs, Trailing Edge, and Leading Edge • 1/16” Sheeting on Leading Edge and Center Section

  24. Rocker

  25. Vertical Tail • Size • Materials/Construction • Vertical Tail Mounting

  26. Vertical Tail • lV = 5.47 ft • Swing = 41.8 ft2 • bwing = 14.4 ft • VV = 0.031

  27. Vertical Tail • TR = 1.5 • Sweep Angle = 22.25o

  28. Vertical Tail Construction • 1/2” x 1/2” Bass Center Spar • 1/2” x 1/4” Bass Front Spar • 1/4” Balsa Vertical Webs • 1/8” Balsa Ribs • Balsa Leading Edge and Trailing Edge

  29. Avionics Pod • Air Data Boom Attachment • Pod Attachment • Camera

  30. Avionics Pod Air Data Boom Placement • On the Fuselage for Protection • In Front of the Plane for Accurate Data Collection • Near the Pod for Easy Integration • Camera Placement

  31. Avionics Pod Pod Construction • Pod Dimensions 14” X 11” X 20” • 1/8” Plywood Base • Balsa Sides • Similar to Fuselage Construction

  32. Avionics Pod Pod Attachment • Variable placement for CG adjustment • Vibration isolated for clearer pictures and electronics protection • Easily mounted with six bolts at the top of the Pod

  33. Avionics Pod Camera Placement • Mounted just above the Keel • 30° look down angle when level allowing for an in flight banking look down angle of 45°

  34. Engine • Engine • Engine Mount • Engine Mount Pylon • Additional Hardware • Propeller Selection

  35. Engine DA-50-R • 5 Hp • 3.13 lbs • Length 6.7” • Bore 1.6771” • Stroke 1.3779” • Clockwise Rotation

  36. Engine • Engine Mount • ¼” Plywood Firewall 3” X 4” • Standoff Mounts Shown in Blue

  37. Engine • Engine Mount Pylon • 1/2” square Bass Wood stringers • Balsa Ribs • 4” X 3” plywood mounting plate • 14” tall providing 12.5” of prop clearance

  38. Engine • 50 oz Dubro Fuel Tank • Fuel Delivery • Fuel tank located at CG • Fuel line run through pylon to the engine • Vacuum created by engine stroke draws fuel • Good for up to 30 feet

  39. Engine • Additional Required Hardware • Throttle Servo • Ignition Battery • Ignition Switch

  40. Engine • Propeller Choices • Manufacturers • Bolly • Menz • Mejzlik • Sizes • 24” X 8” • 22” X 10” • 23” X 10”

  41. Aircraft Maintainability • Service Hatches • Top Hatch • Servo Access Hatches • Exposed Engine for Ease of Maintenance

  42. Radio Instillation

  43. Color Scheme

  44. APPENDIX • Parts Drawings • Single Receiver Instillation • Material List

  45. Single Receiver