Date post: | 30-Dec-2015 |
Category: |
Documents |
Upload: | lisa-french |
View: | 216 times |
Download: | 2 times |
1
ME 442 Senior Project Week 9
Dr. Joseph VignolaPangborn G43, Phone 202-319-6132, [email protected]
Tuesdays & Thursdays, 9:40-12:20 AM, Pangborn G43
Office Hours: Tuesdays, 1:00-2:00 PM
2
The Rest of the SemesterWelcome back from break
3
The Rest of the SemesterEach team should plan to refine their plane and take it back to the DCRC airfield.
I would like each team to refine the design and construction
The most important thing to me is for you to redo anything that was done in hast or “because we didn’t have time”
All temporary work must me removed.
Your plane should match your drawings.
Mass and Mass center predicted in SolidWorks should match the predictions
4
PurchasesI need to see the Excel budgets today and everyday
I want to be sure we are keeping careful track of all expenses.
5
6
The Rest of the SemesterPresentations
7
The Rest of the SemesterPresentations
I will make a schedule and send it out
8
The Rest of the SemesterPresentations
I will make a schedule and send it out
I will try to do this by tomorrow.
9
Things to PurchaseDC-RC club uses this model: Hitec X4 Plus AC/DC 4-Port RC Battery Charger for LiPo, LiFe, Li-Ion, NiCD, NiMH
Battery charger (We found this ! )Battery testerHeat gun, iron, and monocoatTools each team must have their own flight toolbox
10
First PresentationsThe first set of Individuals presentations starting next week.
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
11
First PresentationsThe first set of Individuals presentations starting next week.
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
12
First PresentationsWe will have the first set of Individuals presentations starting next week.
Aim for 7 minutes of presentation and focus on design and how the design was translated into a prototype
You should have no less that 14 PowerPoint slides
There should be figures and all slides
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
13
What to IncludeWe will have the first set of presentations the second week of class.
Talk about: How you made design decisions and show the fabricated result
List of design goals for the full plane and each subsystem
SAE wants you to should a design evolution
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
14
What to IncludeWe will have the first set of presentations the second week of class.
Talk about: How you made design decisions and show the fabricated result
List of design goals for the full plane and each subsystem
SAE wants you to should a design evolution
Lots of SolidWorks drawings of your plane or subsystem
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
15
What Not to IncludeNo need to discusssafety issuesHow you used your timeWhere you found or purchased items“because Don thought it would work” “because Don had one ” Common knowledge General theory
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
16
Writing & Presentation Issues
I have posted my document on writing “Writing issues for engineers”.
I consider this a work in progress.
There is a “First Draft Check List” in the “Writing issues for engineers” document.
Please use after you finish your first draft is assembled for all documents to be turned in for this class.
There is a separate section of this documents for presentations
Writing & Presentation Issues
• Will the reader or recipient know what it is? Identify your document with a descriptive title and an introductory sentence.
• Your document must have your name, the date, the assignment, and a title.
• Get in the habit of using a premade title pages for MS Word and PowerPoint
• Use mine as a template if you like 17
Issue 1: Information Rich Title Pages
Writing & Presentation Issues
• Make sure that your reader can quickly find the section he or she is looking for.
• If you are covering more then one topic, each topic needs to have a titled section.
18
Issue 2: Separate Different Topics
Writing & Presentation Issues
• Use logical sections and subsections
• Title each so that so that the content is obvious
19
Issues 1&2 Corollary: Sections Titles
20
Writing & Presentation Issues
Issue 2: Will the reader or recipient know what it is?
Identify your document with a descriptive title and an introductory sentence.
21
Color and other embellishments
• Color, you can use color but your document but figures should work in B&W if possible.
• Hyperlinks, you should use them but the web address must appear in a footnote or the reference section.
• Animations, movies and sound files can be helpful but can also be trouble. Be aware that some of your readers will not be able to access them.
22
Writing & Presentation Issues
I have posted my document on writing “Writing issues for engineers”.
There is a “First Draft Check List” in the “Writing issues for engineers” document.
Please use after you finish your first draft is assembled for all documents to be turned in for this class.
There is a separate section of this documents for presentations
Information Rich Title Page• Will the reader or recipient know what it is? Identify
your document with a descriptive title and an introductory sentence.
• Your document must have your name, the date, the assignment, and a title.
• Get in the habit of using a premade title pages for MS Word and PowerPoint
• Use mine as a template if you like
23
Separate Different Topics
• Make sure that your reader can quickly find the section he or she is looking for.
• If you are covering more then one topic, each topic needs to have a titled section.
24
Section Titles
• Use logical sections and subsections
• Title each so that so that the content is obvious
25
Section Titles
• Use logical sections and subsections
• Title each so that so that the content is obvious
“Introduction” is not a good subsection title for the introduction
“Analysis” is not a good subsection title of the analysis section
26
27
Color and other embellishments
• Color, you can use color but your document but figures should work in B&W if possible.
• Hyperlinks, you should use them but the web address must appear in a footnote or the reference section.
• Animations, movies and sound files can be helpful but can also be trouble. Be aware that some of your readers will not be able to access them.
28
Refine DocumentationEach member of the group should be sure that you bring ALL electronic files everydaySolidWorks drawings
29
DocumentationEach member of the group should be sure that you bring all electronic files everydaySolidWorks drawingsExcel budget and receipts
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
30
DocumentationEach member of the group should be sure that you bring all electronic files everydaySolidWorks drawingsExcel budget, must be this version or have this information
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
31
DocumentationEach member of the group should be sure that you bring all electronic files everydaySolidWorks drawingsExcel budget, must be this version or have this information
Item(s)Date of purchaseSupplierDate receivedTotal 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
32
DocumentationPlease bring all your electronic files everyday
SolidWorks drawingsExcel budget
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
It’s best to use the document that I started
33
DocumentationPlease bring all your electronic files everyday
SolidWorks drawingsExcel budget
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
It’s best to use the document that I startedIt’s on the class web page
34
Design Support Documents
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
1) Gantt chart A timeline with milestones, component delivery dates, estimated dates of the
completions of sub-tasks. This can be a separate Excel document.
2) Weight and drag budget A document that lists target, design and as-build weight and location for all components
on the plane. Specifically state what are estimates and what was calculated in SolidWorks and what was measured as-built. Include the coordinates of the CGs for all subsystem. The coordinates must be in a defined, single coordinate system and include a figure that shows the plane, coordinate system and centers. This should be in the main MS Word document.
35
Design Support Documents
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
3) Cost budget & parts inventoryA list of all component parts you will include in your plane. You should have links to data sheets. The budget should include all planed expenditures and all money spent by your group related to the project. This is can be a summary of a separate Excel spread sheet. You must save all receipts.
4) Toolbox inventoryA specific list of all tools, bolts and any other hardware with sized. Do not include this in the Excel document. This should be in the main MS Word document.
5) Safety protocolsRead the new School of Engineering Safety document and write a statement that indicates that you have read and will comply with all points of the School of Engineering Safety. This document must be signed by all team members.
36
Design Support Documents
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
3) Cost budget & parts inventoryA list of all component parts you will include in your plane. You should have links to data sheets. The budget should include all planed expenditures and all money spent by your group related to the project. This is can be a summary of a separate Excel spread sheet. You must save all receipts.
4) Toolbox inventoryA specific list of all tools, bolts and any other hardware with sized. Do not include this in the Excel document. This should be in the main MS Word document.
5) Safety protocolsRead the new School of Engineering Safety document and write a statement that indicates that you have read and will comply with all points of the School of Engineering Safety. This document must be signed by all team members.
Plus send Ken your SolidWorks
37
Group Purchases
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
We need to purchase:
chargerCharge level indicator
38
SAE Reports
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
Please don’t resubmit last semesters reports
39
Materials and PurchasingIt is very import that we straighten the budget today
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
40
Materials and PurchasingIt is very import that we straighten the budget today
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
41
Materials and PurchasingIt is very import that we straighten the budget today
42
Materials and PurchasingIt is very import that we straighten the budget today
43
MaterialsI can cut materials for you to any dimension, exactly to the dimensions you give me.
44
ExpediencyBe sure you are making design decisions based on engineering principles.
Please don’t
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
45
MaterialsAsk Ken to bring specific material you need
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
Ken
46
Materials and PurchasingIt is very import that we straighten the budget today There are problems with the credit card
MNEY
47
Materials and PurchasingIt is very import that we straighten the budget today There are problems with the credit card
The card problems include the lost receipts from this class
MNEY
48
Materials and Purchasinge-mail Hong right away to schedule time
She is nicer that I am and will help you
49
Flight Testing
Jim and Ed want to test Tuesday, Feb 25
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
That’s 7 days off
50
Flight TestingI’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
S M T W Th F S
6 7 8
9 10 11 12 13 14 15
16 17 18 Today 19 20 21 22
23 24 25 Flight Test
26 27 28SAE Deadline
May 1
I’m still working on this but the big issues is
51
Machine ShopPlease 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
52
Machine ShopPlease 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
53
Assignment 2Fix 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
54
Assignment 2Fix 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
55
Assignment 2Fix 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 forPlease don’t list random items
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
56
Assignment 2Fix 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 forPlease don’t list random items ¼” screws
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
57
Assignment 2Fix 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 forPlease don’t list random items ¼” screws, a hammer
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
58
Assignment 2Fix 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 forPlease don’t list random items ¼” screws, a hammer, weed wacker
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
59
Assignment 2Fix 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 forPlease don’t list random items ¼” screws, a hammer, weed wacker
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
60
Assignment 2Fix 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
61
Money
Lets start with the group that has the most people here
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
62
Money
Thanks for the help resolving the credit card issues
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
63
Flight Testing
Jim and Ed want to test Monday, Feb 24
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
64
Flight Testing
Jim and Ed want to test Monday, Feb 24
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
S M T W Th F S
6 Today 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 Flight Test
25 26 27 28 29
I’m still working on this but the big issues is
65
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
S M T W Th F S
6 Today 7 8
9 10 11 12 13 14 15
16 17 18 tech insp taxi test
19 20 21 22
23 24 25 Flight Test
26 27 28 1
66
So Given the Calendar
Work with Ken, Hong, Don, and Me
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
67
Flight Test
I would like you to make all the arrangements regarding getting up to the airfield Tuesday.
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
68
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
69
Myths and TruthsMyths Gorilla Glue is no stronger than ordinary carpenters glue
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
70
Myths and TruthsMyths 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
71
Myths and TruthsMyths 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
72
Myths and TruthsMyths 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
73
Myths and TruthsTruthsRound holes are easier to make then not round holes
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
74
Myths and TruthsTruthsRound holes are easier to make then not round holes
Hong needs some sleep
Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html
75
You need to know where the CG isWeighted averages.
x
y
76
Mass and Aerodynamic Centers Weighted averages.
x
y
77
Mass and Aerodynamic Centers Weighted averages. Pick an origin
x
y
78
Mass and Aerodynamic Centers Weighted averages. Pick an origin, make a table
x
y
component Mass (kg) x-location (cm)
engine 0.45 -3
fuselage 2.1 75
Wing 2.3 27
Front landing gear 0.35 12
Rear landing gear 0.64 34
Fuel tank 0.33 8
Radio reciever 0.25 7
tail 0.75 150
Payload
Total 7.17 319
79
Mass and Aerodynamic Centers Weighted averages. Pick an origin, make a table
x
y
component Mass (kg) x-location (cm)
engine 0.45 -3
fuselage 2.1 75
Wing 2.3 27
Front landing gear 0.35 12
Rear landing gear 0.64 34
Fuel tank 0.33 8
Radio reciever 0.25 7
tail 0.75 150
Payload
Total 7.17 319
51.2 cm
80
Mass and Aerodynamic Centers Each component that is exposed to the exterior flowHas 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
81
Mass and Aerodynamic Centers Each component that is exposed to the exterior flowHas 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
82
Mass and Aerodynamic Centers
x
z
51.2 cm
Once you have them…
DRAW A FREE BODY DIAGRAM
83
Mass and Aerodynamic Centers Once you have them Then sum forces andmoments
mg
thrust
Wing drag
tail drag
fuselage drag
84
Mass and Aerodynamic Centers Once you have them Then sum forces andmoments
mg
thrust
Wing drag
tail drag
fuselage dragx
z
85
Mass and Aerodynamic Centers Once you have them Then sum forces andmoments
mg
thrust
Wing drag
tail drag
fuselage dragx
z
86
Mass and Aerodynamic Centers Once you have them Then sum forces andmoments
mg
thrust
Wing drag
tail drag
fuselage dragx
z
87
Mass and Aerodynamic Centers Once you have them Then sum forces andmoments
mg
thrust
Wing drag
tail drag
fuselage dragx
z
88
Mass and Aerodynamic Centers This summing for moments is precisely the same as the weighted average
x
z
51.2 cm
component Net drag (N) z-location (cm)
x-location (cm
fuselage 2.7 5 44
Wing 15.3 17 45
Front landing gear
3.5 -12 34
Rear landing gear
5.8 -11 76
tail 13.7 21 125
Total 40.7
89
You MUST include this informationThis summing for moments is precisely the same as the weighted average
x
z
51.2 cm
component Net drag (N) z-location (cm)
x-location (cm
fuselage 2.7 5 44
Wing 15.3 17 45
Front landing gear
3.5 -12 34
Rear landing gear
5.8 -11 76
tail 13.7 21 125
Total 40.7
So have a figure with YOUR plane, a coordinate system, and the location of the centers
90
Design to Meet ObjectivesThe 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
91
Design to Meet ObjectivesThe 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
92
Design to Meet ObjectivesThe 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 ConstraintsThere 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 RequirementsHold: 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 CLRemovable wing mount able to transfer 42 lbs from wing to fuselage. Engine mount within ± ½ in of current estimate of plane’s aerodynamic centerTransfer 2 x planes full weight (84 lbs) to landing gear…
Support 2.5 lb horizontal force generated by tail with rudder at full deployment…
95
ME 442 Senior Project Week 3
Dr. Joseph VignolaPangborn G43, Phone 202-319-6132, [email protected]
Tuesdays & Thursdays, 9:35-12:25 AM, Pangborn G43
Office Hours: Tuesdays, 1:00-2:00 PM
Week 3
Build
Week 3
Please email your t-shirt size to Ms. Hicks and Nicole Bull
Today I would like to see Excel budgets