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Group 3 Heavy Lift Cargo Plane

Group 3 Heavy Lift Cargo Plane. William Gerboth, Jonathan Landis, Scott Munro, Harold Pahlck February 18, 2010. Presentation Outline. Project Objectives Q&A From Phase III Revised Payload Prediction Flight Controls Prototype Fabrication Plan Fabrication Schedule Updated Budget

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Group 3 Heavy Lift Cargo Plane

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  1. Group 3Heavy Lift Cargo Plane William Gerboth, Jonathan Landis, Scott Munro, Harold Pahlck February 18, 2010

  2. Presentation Outline Project Objectives Q&A From Phase III Revised Payload Prediction Flight Controls Prototype Fabrication Plan Fabrication Schedule Updated Budget Plan for Phase V Nugget Chart

  3. Project Objectives Design and build an airplane that meets the requirements of the SAE Aero East competition Plane must successfully take off from a runway of 200 feet and land on a runway 400 feet Constraints of 55 pounds total weight, and the combined height, length, and width of 200 inches Plane must make one complete 360° circuit of the field per attempt

  4. Phase III Questions • How is Induced Drag accounted for? • Drag as a result of lift created by a finite wing • Induced drag coefficient is added to overall drag • Landing Gear Analysis • Used deflection to gain an understanding of the bending that can be expected during landing • Stability • The center of gravity is located in a neutral point • With increasing payloads the plane maintains a positive static margin

  5. Phase III Questions (cont.) • Explanation of Graphs • Takeoff calculations done in excel • Using takeoff velocity, stall velocity, and ground roll distance • One Pound Force used in Analysis • Using a force of 15mph wind perpendicular to the tail creates a force of 1.3 pounds • Ease of Assembly and Manufacturing • Difference in thickness of trailing edge • Ability to make changes in internal workings

  6. Revised Payload Prediction • Grass runway instead of concrete • Higher coefficient of rolling friction • Grass takeoff requires long takeoff distance, reducing payload that can be lifted in 200 ft. • Calculations showed reduction of 2 lbs’ • Expecting more reduction due to unforeseen factors such as terrain and length of grass

  7. Payload Prediction Graph

  8. Flight Controls • 8 Servos Used • 1 servo per aileron and flap located in wing • 1 for each elevator located at rear of the fuselage • 1 for the throttle • 1 for the rudder and front wheel

  9. Flight Control Sizing • Two approaches • Used largest value from following calculation and table

  10. Fabrication – Wing Structure • Constructed using 38 ribs • Ribs cut using Eppler 423 template with a X-Acto knife • Ribs connected using a system of spars • One spar at the leading edge, one at 25% of the cord and five separate spars along the trailing edge • Flaps and ailerons will be attached to the trailing edge with hinges • Holes will be drilled for bolting to fuselage • Entire wing structure covered in Monokote using heat gun

  11. Fabrication - Wing Structure

  12. Fabrication - Fuselage • Front cowl made of balsa • Firewall behind cowl made of plywood • Center section of fuselage constructed with a cargo opening, balsa walls, and plywood floor for structural rigidity • Supports added to the center section for rigidity and to allow mounting of the wing • Rear of fuselage built from ribs tapering in size • Fuselage covered in Monokote

  13. Fabrication - Fuselage

  14. Fabrication – Tail Plane • Two main components vertical and horizontal tail • Vertical tail cut from balsa wood • Rudder attached to rear with hinges • Horizontal tail made from 12 ribs cut from NACA 0012 template • Three spars will connect ribs • Vertical stabilizers will be connected to the rear using hinges

  15. Fabrication – Tail Plane

  16. Fabrication – Landing Gear • Salvaged from previous years • Front Landing Gear – commercially purchased strut with spring to absorb impact • Rear Landing Gear – Aluminum stamped into horseshoe shape • Steel cable attached between two rear wheels • Rear landing gear bolted to fuselage • Front landing gear attached to allow rotation for steering

  17. Fabrication – Landing Gear

  18. Fabrication Schedule

  19. Updated Budget

  20. Plan for Phase V • Parts have been ordered • Fabricate aluminum templates to cut the balsa wood ribs • Use materials currently in the storeroom • Contact RC pilot to test model when finished • Complete aircraft by beginning of April

  21. ME 424 Phase IV Nugget Chart– Performance Testing & Design Improvement Title: Heavy Cargo Lift Plane Team Members: William Gerboth, Scott Munro, Jonathan Landis, Harold Pahlck Advisor: Professor Siva Thangam Project #: 3 Date: 2/18/10

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