1. 1 ME 442 Senior Project Week 4 Dr. Joseph Vignola Pangborn G43, Phone 202-319-6132, vignola@cua.eduvignola@cua.edu Tuesdays & Thursdays, 9:35-12:25 AM, Pangborn G43 Office Hours: Tuesdays, 1:00-2:00 PM

2. 2 Word of the Day Do you know the word obfuscate ? Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

3. 3 Word of the Day Do you know the word obfuscate ? Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html Please don’t obfuscate

4. 4 Word of the Day Do you know the word obfuscate ? Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html Please don’t obfuscate If a question start with How many…?

5. 5 Word of the Day Do you know the word obfuscate ? Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html Please don’t obfuscate If a question start with How many…? The answer should include a number

6. 6 Documentation Please bring all your electronic files everyday SolidWorks drawings Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

7. 7 Documentation Please bring all your electronic files everyday SolidWorks drawings Excel budget Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

8. 8 Documentation Please bring all your electronic files everyday SolidWorks drawings Excel budget, must be this version or have this information Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

9. 9 Documentation Please bring all your electronic files everyday SolidWorks drawings Excel budget, must be this version or have this information Item(s) Date of purchase Supplier Date received Total cost (items + shipping and anything else) Who’s credit was used Name of the receipt pdf file One line per transaction Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

10. 10 Documentation Please bring all your electronic files everyday SolidWorks drawings Excel budget Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html It’s best to use the document that I started

11. 11 Documentation Please bring all your electronic files everyday SolidWorks drawings Excel budget Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html It’s best to use the document that I started It’s on the class web page

12. 12 Budget Document From here forward you must use my version of the document The reason is that many of you: Made addition mistakes Didn’t include important information like the date of the purchase and the name of the company you made the purchase from. Remember: One line per transaction Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

13. 13 Budget Document From here forward you must use my version of the document The reason is that many of you: Made addition mistakes Didn’t include important information like the date of the purchase and the name of the company you made the purchase from. Remember: One line per transaction not one item Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

14. 14 Purchases I need to see the Excel budgets today and everyday I want to be sure we are keeping careful track of all expenses. Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

15. 15 Materials and Purchasing It is very import that we straighten the budget today We have $1630.32 of unattributed expenses related to Senior Design. Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

16. 16 Materials and Purchasing It is very import that we straighten the budget today We have $1630.32 of unattributed expenses related to Senior Design. This is January only Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

17. 17 Materials and Purchasing It is very import that we straighten the budget today Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

18. 18 Materials and Purchasing It is very import that we straighten the budget today Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html Ms. Hicks

19. 19 Materials and Purchasing It is very import that we straighten the budget today Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html Ms. Hicks You want her on your side

20. 20 Materials and Purchasing It is very import that we straighten the budget today There will be problems with the credit card Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

21. 21 Materials and Purchasing It is very import that we straighten the budget today There will be problems with the credit card From now own I must approve all purchases Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

22. 22 Materials and Purchasing It is very import that we straighten the budget today There will be problems with the credit card Ask Ken to bring specific material you need Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html MNEY Ken

23. 23 Materials and Purchasing It is very import that we straighten the budget today There will be problems with the credit card Ask Ken to bring specific material you need Dimensioning lumber Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

24. 24 Materials and Purchasing It is very import that we straighten the budget today There will be problems with the credit card Ask Ken to bring specific material you need Dimensioning lumber e-mail Hong right away to schedule time

25. 25 Materials and Purchasing It is very import that we straighten the budget today There will be problems with the credit card Ask Ken to bring specific material you need Dimensioning lumber e-mail Hong right away to schedule time She will help you.

26. 26 Machine Shop Please work with Don, Hong or anyone that has built things Show them sketches of ideas and be open to new ideas This will make it easier for you Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

27. 27 Machine Shop Please work with Don, Hong or anyone that has built things Show them sketches of ideas and be open to new ideas Simplify your design Settle on the details Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

28. 28 Assignment 2 Fix assignment 1 A number of groups did not submit assignment 2 or didn’t really update anything Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

29. 29 Assignment 2 Fix assignment 1 Toolbox Please just list what you need to carry to the airfield. Glue that take overnight to dry is probably not appropriate for that list but cyanoacrylate glue (Superglue) is You should know what each screw is for Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

30. 30 Assignment 2 Fix assignment 1 Toolbox Please just list what you need to carry to the airfield. Glue that take overnight to dry is probably not appropriate for that list but cyanoacrylate glue (Superglue) is You should know what each screw is for Please don’t list random items Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

31. 31 Assignment 2 Fix assignment 1 Toolbox Please just list what you need to carry to the airfield. Glue that take overnight to dry is probably not appropriate for that list but cyanoacrylate glue (Superglue) is You should know what each screw is for Please don’t list random items ¼” screws Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

32. 32 Assignment 2 Fix assignment 1 Toolbox Please just list what you need to carry to the airfield. Glue that take overnight to dry is probably not appropriate for that list but cyanoacrylate glue (Superglue) is You should know what each screw is for Please don’t list random items ¼” screws, a hammer Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

33. 33 Assignment 2 Fix assignment 1 Toolbox Please just list what you need to carry to the airfield. Glue that take overnight to dry is probably not appropriate for that list but cyanoacrylate glue (Superglue) is You should know what each screw is for Please don’t list random items ¼” screws, a hammer, weed wacker Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

34. 34 Assignment 2 Fix assignment 1 Toolbox Please just list what you need to carry to the airfield. Ask Jason, Hong, Ken or me what you really need Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

35. 35 Money Lets start with the group that has the most people here Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

36. 36 Money Thanks for the help resolving the credit card issues Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

37. 37 Flight Testing Jim and Ed want to test Monday, Feb 24 Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

38. 38 Flight Testing Jim and Ed want to test Monday, Feb 24 Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html I’m still working on this

39. 39 Flight Testing Jim and Ed want to test Monday, Feb 24 Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html SMTWThFS 6 Today78 9101112131415 16171819202122 2324 Flight Test 2526272829 I’m still working on this but the big issues is

40. 40 Flight Testing Jim and Ed want to test Monday, Feb 24 Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html …and you have to do the taxi test and technical inspection before the flight test I’m still working on this but the big issues is SMTWThFS 6 Today78 9101112131415 161718 tech insp taxi test 19202122 232425 Flight Test 2627281

41. 41 Flight Testing I’m hoping that Ken will schedule and do the technical inspection and taxi tests with you Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html …and you have to do the taxi test and technical inspection before the flight test SMTWThFS 6 Today78 9101112131415 16171819202122 2324 Flight Test 2526272829 I’m still working on this but the big issues is

42. 42 So Given the Calendar Work with Ken, Hong, Don, and Me Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

43. 43 Money Thanks for the help resolving the credit card issues Today we can start with group ? Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

44. 44 Myths and Truths Myths Gorilla Glue is no stronger than ordinary carpenters glue Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

45. 45 Myths and Truths Myths Gorilla Glue is no stronger than ordinary carpenters glue You can make a part bigger then the travel range of the CNC machine Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

46. 46 Myths and Truths Myths Gorilla Glue is no stronger than ordinary carpenters glue You can make a part bigger then the travel range of the CNC machine Ken brought enough wood for everyone Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html Ken

47. 47 Myths and Truths Myths Gorilla Glue is no stronger than ordinary carpenters glue You can make a part bigger then the travel range of the CNC machine Ken brought enough wood for everyone Purchase always come through as hoped Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

48. 48 Myths and Truths Truths Round holes are easier to make then not round holes Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

49. 49 Myths and Truths Truths Round holes are easier to make then not round holes Hong needs some sleep Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html

50. 50 You need to know where the CG is Weighted averages. x y

51. 51 Mass and Aerodynamic Centers Weighted averages. x y

52. 52 Mass and Aerodynamic Centers Weighted averages. Pick an origin x y

53. 53 Mass and Aerodynamic Centers Weighted averages. Pick an origin, make a table x y componentMass (kg)x-location (cm) engine0.45-3 fuselage2.175 Wing2.327 Front landing gear0.3512 Rear landing gear0.6434 Fuel tank0.338 Radio reciever0.257 tail0.75150 Payload Total7.17319

54. 54 Mass and Aerodynamic Centers Weighted averages. Pick an origin, make a table x y componentMass (kg)x-location (cm) engine0.45-3 fuselage2.175 Wing2.327 Front landing gear0.3512 Rear landing gear0.6434 Fuel tank0.338 Radio reciever0.257 tail0.75150 Payload Total7.17319 51.2 cm

55. 55 Mass and Aerodynamic Centers Each component that is exposed to the exterior flow Has a net drag force that acts on that component The magnitude of that force is 51.2 cm These drag forces occur at specific locations These location must be determined Once you have them x z

56. 56 Mass and Aerodynamic Centers Each component that is exposed to the exterior flow Has a net drag force that acts on that component The magnitude of that force is x z 51.2 cm These drag forces occur at specific locations These location must be determined Once you have them

57. 57 Mass and Aerodynamic Centers x z 51.2 cm Once you have them… DRAW A FREE BODY DIAGRAM

58. 58 Mass and Aerodynamic Centers Once you have them Then sum forces and moments mg thrust Wing drag tail drag fuselage drag

59. 59 Mass and Aerodynamic Centers Once you have them Then sum forces and moments mg thrust Wing drag tail drag fuselage drag x z

60. 60 Mass and Aerodynamic Centers Once you have them Then sum forces and moments mg thrust Wing drag tail drag fuselage drag x z

61. 61 Mass and Aerodynamic Centers Once you have them Then sum forces and moments mg thrust Wing drag tail drag fuselage drag x z

62. 62 Mass and Aerodynamic Centers Once you have them Then sum forces and moments mg thrust Wing drag tail drag fuselage drag x z

63. 63 Mass and Aerodynamic Centers This summing for moments is precisely the same as the weighted average x z 51.2 cm componentNet drag (N)z-location (cm) x-location (cm fuselage2.7544 Wing15.31745 Front landing gear 3.5-1234 Rear landing gear 5.8-1176 tail13.721125 Total40.7

64. 64 You MUST include this information This summing for moments is precisely the same as the weighted average x z 51.2 cm componentNet drag (N)z-location (cm) x-location (cm fuselage2.7544 Wing15.31745 Front landing gear 3.5-1234 Rear landing gear 5.8-1176 tail13.721125 Total40.7 So have a figure with YOUR plane, a coordinate system, and the location of the centers

65. 65 Design to Meet Objectives The objectives are requirements and constraints Requirements and constraints are separate Requirements: what you are expecting from the full system or subsystem Constraints: what you are stuck with They must be specific

66. 66 Design to Meet Objectives The objectives are requirements and constraints Requirements and constraints are separate Requirements: what you are expecting from the full system or subsystem Constraints: what you are stuck with They must be specific Landing gear must be strong enough

67. 67 Design to Meet Objectives The objectives are requirements and constraints Requirements and constraints are separate Requirements: what you are expecting from the full system or subsystem Constraints: what you are stuck with They must be specific Landing gear must be strong enough Must remain elastic for 3 f/s vertical fall will transferring less that a 2 g impulse to the fuselage

68. Requirements and Constraints There MUST be requirements and constraints for the plane itself Every subsystem MUST have bulletined requirements and constraints listed separately The should have numbers and be specific

69. Fuselage Requirements Hold: 4 cell battery (based on 6 minute flight) z57 model radio receiver (with link to data sheet) 27 lbs payload at plane’s unloaded CG and wing’s CL Removable wing mount able to transfer 42 lbs from wing to fuselage. Engine mount within ± ½ in of current estimate of plane’s aerodynamic center Transfer 2 x planes full weight (84 lbs) to landing gear … Support 2.5 lb horizontal force generated by tail with rudder at full deployment …

70. 70 ME 442 Senior Project Week 3 Dr. Joseph Vignola Pangborn G43, Phone 202-319-6132, vignola@cua.eduvignola@cua.edu Tuesdays & Thursdays, 9:35-12:25 AM, Pangborn G43 Office Hours: Tuesdays, 1:00-2:00 PM

71. Week 3 Build

72. Week 3 Please email your t-shirt size to Ms. Hicks and Nicole Bull 43bull@cardinalmail.cua.edu Today I would like to see Excel budgets