1 ME 442 Senior Project Week 3 Dr. Joseph Vignola Pangborn G43, Phone , Tuesdays & Thursdays, 9:35-12:25 AM, Pangborn G43 Office Hours: Tuesdays, 1:00-2:00 PM

2 University Mass The University Mass is today so will finish today at 11:50 The mass begins at 12:10 pm in the upper church of the Shrine, Taken from

3 Documentation Please bring all your electronic files everyday SolidWorks drawings Taken from

4 Documentation Please bring all your electronic files everyday SolidWorks drawings Excel budget Taken from

5 Documentation Please bring all your electronic files everyday SolidWorks drawings Excel budget Taken from It’s best to use the document that I started

6 Documentation Please bring all your electronic files everyday SolidWorks drawings Excel budget Taken from It’s best to use the document that I started It’s on the class web page

7 Purchases I need to see the Excel budgets today and Thursday I want to be sure we are keeping careful track of all expenses. Taken from

8 Materials and Purchasing It is very import that you start purchasing now There will be problems with the credit card Ask Ken to bring specific material you need Taken from

9 Machine Shop Please work with Don, Hong or anyone that has built things Show them sketches of ideas and be open to changes Taken from

10 Machine Shop Please work with Don, Hong or anyone that has built things Show them sketches of ideas and be open to changes Simplify your design Taken from

11 Machine Shop Please work with Don, Hong or anyone that has built things Show them sketches of ideas and be open to changes Simplify your design Settle on the details Taken from

12 Machine Shop Safety We now have the School of Engineering Safety Rules Everyone must read, understand and sign Signature page must be clear and readable Schedule shop time with Hong Taken from

13 Assignment 2 Fix assignment 1 The first six (now five) part design support document was due Tuesday. Want an A? Generally speaking come talk to me before its due and I will go over it with you. I’ll help you edit it and then you’ll have all the information the A will be yours. We will start with group 1 and work backwards Maybe I can do two groups at a time Taken from

14 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

15 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

16 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

17 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

18 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

19 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

20 Myths and Truths Myths Gorilla Glue is no stronger than ordinary carpenters glue Taken from

21 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

22 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 Ken

23 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

24 Myths and Truths Truths Round holes are easier to make then not round holes Taken from

25 Myths and Truths Truths Round holes are easier to make then not round holes Hong needs some sleep Taken from

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

27 Mass and Aerodynamic Centers Weighted averages. x y

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

29 Mass and Aerodynamic Centers Weighted averages. Pick an origin, make a table x y componentMass (kg)x-location (cm) engine fuselage2.175 Wing2.327 Front landing gear Rear landing gear Fuel tank0.338 Radio reciever0.257 tail Payload Total

30 Mass and Aerodynamic Centers Weighted averages. Pick an origin, make a table x y componentMass (kg)x-location (cm) engine fuselage2.175 Wing2.327 Front landing gear Rear landing gear Fuel tank0.338 Radio reciever0.257 tail Payload Total cm

31 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

32 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

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

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

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

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

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

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

39 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 fuselage Wing Front landing gear Rear landing gear tail Total40.7

40 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 fuselage Wing Front landing gear Rear landing gear tail Total40.7 So have a figure with YOUR plane, a coordinate system, and the location of the centers

41 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

42 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

43 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

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

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 …

46 ME 442 Senior Project Week 3 Dr. Joseph Vignola Pangborn G43, Phone , Tuesdays & Thursdays, 9:35-12:25 AM, Pangborn G43 Office Hours: Tuesdays, 1:00-2:00 PM

Week 3 Build

Week 3 Please your t-shirt size to Ms. Hicks and Nicole Bull Today I would like to see Excel budgets