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First PresentationsWe will have the second half of the individual presentations today.
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First PresentationsThe set of Individuals presentations today.
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First Group PresentationsWe’ll start the group presentations Thursday
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First Group PresentationsWe’ll start the group presentations Thursday with groups 6, 5 & 4
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First Group PresentationsWe’ll start the group presentations Thursday with groups 6, 5 & 4
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First Group PresentationsWe’ll start the group presentations Thursday with groups 6, 5 & 4
I’d like to to follow the SAE grading document precisely
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First Group PresentationsWe’ll start the group presentations Thursday with groups 6, 5 & 4
I’d like to to follow the SAE grading document precisely
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What I mean is that you should have slides with exactly these titles, in their order and only talk about the things they list.
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SAE Aero Design EastTechnical Presentation by: The Flying NoneThe Catholic University of AmericaWashington, DC
SAE Aero Design EastApril 11, 2014 Marietta, Georgia
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Technical Approach Our team …
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Vehicle Sizing, Lift & Drag175”Weight budgetCG just behind CLMain gear positionDrag budget and drag as a function of speed
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ConfigurationHigh, mid or low wing, why? Tail configuration, Payload Landing gear style and
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Stability & ControlDrag center and tail design
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Weight BuildupWeight BudgetWeight distribution
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Propulsion
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Performance Analysis
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Take off analysis
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Performance Analysis
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Crouse analysis
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Stress Analysis
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Hard landing
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Material Selection
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Because it’s cheepBecause it’s light
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Trade Studies
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Empirical Results
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Project Plan / Schedule
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Flight Testing
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Show DC flight tests
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Conclusions
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The Design meet the requirements
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First PresentationsAim for 7 minutes of presentation and focus on design and how the design was translated into a prototype
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First PresentationsAim 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
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First PresentationsAim 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
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First PresentationsAim 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 on all slides
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First PresentationsAim 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 on all slides… And use your plane
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Skip the Embellished Slide Template
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Skip the Embellished Slide Template
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Skip the Embellished Slide Template
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Skip the Embellished Slide Template
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Skip the Embellished Slide Template
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Skip the Embellished Slide Template
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Skip the Embellished Slide Template
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Skip the Embellished Slide Template
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They add nothing
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Focus on FactsFocus on Facts
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The Tyranny of FactsFocus on FactsBut Facts aren’t enough
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The Tyranny of FactsFocus on FactsBut Facts aren’t enough
Include context… why the facts matter.
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The Tyranny of FactsFocus on FactsBut Facts aren’t enough
Include context… why the facts matter.
Examples of facts without context:
The lift coefficient is 1.2 which is highThe density of Balsa (or Paulownia) is 160 kg/m3 (or 350 kg/m3)
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Pace and SpeedPlan and rehearse your words
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Pace and SpeedPlan and rehearse your words
Talk fast and cover as much ground as you possibly can in 7 minutes
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Pace and SpeedPlan and rehearse your words
Talk fast and cover as much ground as you possibly can in 7 minutes
You audience will get it.
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Pace and SpeedPlan and rehearse your words
Make an outline on layout how many minutes for each section
1)Who am I and what the &*%$ am I talking about ½ minute2)Premise statement ½ minute3)Design objectives 1 minute4)Details of fuselage design 2 minutes5)Discussion of how system effects and is 2 minutes incorporated in to full plane 6) Conclusion showing proof design meets objective 1 minute
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Pace and SpeedPlan and rehearse your words
Make an outline on layout how many minutes for each section
1)Who am I and what the &*%$ am I talking about ½ minute2)Premise statement ½ minute3)Design objectives 1 minute4)Details of fuselage design 2 minutes5)Discussion of how system effects and is 2 minutes incorporated in to full plane 6) Conclusion showing proof design meets objective 1 minute
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Have a timer during your talk
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Pace and SpeedPlan and rehearse your words
Make an outline on layout how many minutes for each section
1)Who am I and what the &*%$ am I talking about ½ minute2)Premise statement ½ minute3)Design objectives 1 minute4)Details of fuselage design 2 minutes5)Discussion of how system effects and is 2 minutes incorporated in to full plane 6) Conclusion showing proof design meets objective 1 minute
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Have a timer during your talk
And use it
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What to IncludeTalk aboutHow you made design decisions and show the fabricated result
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What to IncludeTalk aboutHow you made design decisions and show the fabricated result
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What to IncludeTalk aboutHow you made design decisions and show the fabricated result
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What to IncludeTalk aboutHow you made design decisions and show the fabricated result
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What to IncludeTalk aboutHow you made design decisions and show the fabricated result
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Close the LoopYou must use your analysis to refine your design through several cycles and then show that you met objectives.
design analysis
Input:requirements
&constraints
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Close the LoopYou must use your analysis to refine your design through several cycles and then show that you met objectives.
design analysis
Input:requirements
&constraints
Open loop system
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Close the LoopYou must use your analysis to refine your design through several cycles and then show that you met objectives.
design analysis
Input:requirements
&constraints
This is not the design process
Open loop system
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Close the LoopYou must use your analysis to refine your design through several cycles and then show that you met objectives.
design analysis
Input:requirements
&constraints
This is not the design process
Open loop system
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Close the LoopYou must use your analysis to refine your design through several cycles and then show that you met objectives.
design analysis
Input:requirements
&constraints
Question: does design meet goals?
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Close the LoopYou must use your analysis to refine your design through several cycles and then show that you met objectives.
design analysis
Input:requirements
&constraints
Question: does meet goals?
if no
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Close the LoopYou must use your analysis to refine your design through several cycles and then show that you met objectives.
design analysis
Input:requirements
&constraints
if no
Question: does meet goals?
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Close the LoopYou must use your analysis to refine your design through several cycles and then show that you met objectives.
design analysis
Input:requirements
&constraints
if no
Question: does meet goals?
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Close the LoopYou must use your analysis to refine your design through several cycles and then show that you met objectives.
design analysis
Input:requirements
&constraints
if no
Question: does meet goals?
+
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Close the LoopYou must use your analysis to refine your design through several cycles and then show that you met objectives.
design analysis+
Input:requirements
&constraints
if no
Question: does meet goals?
Cycle until requirements and constraints are met and the answer is yes
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Close the LoopYou must use your analysis to refine your design through several cycles and then show that you met objectives.
design analysis+
Input:requirements
&constraints
output:design
output:proof designmeetsgoals
Question: does meet goals?
If yes
Now you have a complete design
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What to IncludeTalk aboutHow you made design decisions and show the fabricated result
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What to IncludeTalk aboutHow you made design decisions and show the fabricated result
List of design goals for the full plane and each subsystem
Remember that the design requirementsdrive the design
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What to IncludeTalk aboutHow 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
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What to IncludeTalk aboutHow 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
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What to IncludeTalk aboutHow 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
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Detail drawings
Overall drawings
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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
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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
No gesticulation to describe a mechanical system
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Be Ready Don’t look helpless
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Be Ready Don’t look helpless
Be ready to go
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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 73
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.
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Issue 2: Separate Different Topics
Writing & Presentation Issues
• Use logical sections and subsections
• Title each so that so that the content is obvious
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Issues 1&2 Corollary: Sections Titles
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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.
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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.
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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
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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.
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Section Titles
• Use logical sections and subsections
• Title each so that so that the content is obvious
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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
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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.
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Refine DocumentationEach member of the group should be sure that you bring ALL electronic files everydaySolidWorks drawings
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DocumentationEach member of the group should be sure that you bring all electronic files everydaySolidWorks drawingsExcel budget and receipts
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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
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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
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DocumentationPlease bring all your electronic files everyday
SolidWorks drawingsExcel budget
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It’s best to use the document that I started
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DocumentationPlease bring all your electronic files everyday
SolidWorks drawingsExcel budget
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It’s best to use the document that I startedIt’s on the class web page
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Design Support Documents
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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.
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Design Support Documents
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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.
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Design Support Documents
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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
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Group Purchases
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We need to purchase:
chargerCharge level indicator
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SAE Reports
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Please don’t resubmit last semesters reports
95
Materials and PurchasingIt is very import that we straighten the budget today
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Materials and PurchasingIt is very import that we straighten the budget today
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97
Materials and PurchasingIt is very import that we straighten the budget today
98
Materials and PurchasingIt is very import that we straighten the budget today
99
MaterialsI can cut materials for you to any dimension, exactly to the dimensions you give me.
100
ExpediencyBe sure you are making design decisions based on engineering principles.
Please don’t
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101
MaterialsAsk Ken to bring specific material you need
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Ken
102
Materials and PurchasingIt is very import that we straighten the budget today There are problems with the credit card
MNEY
103
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
104
Materials and Purchasinge-mail Hong right away to schedule time
She is nicer that I am and will help you
105
Flight Testing
Jim and Ed want to test Tuesday, Feb 25
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That’s 7 days off
106
Flight TestingI’m hoping that Ken will schedule and do the technical inspection and taxi tests with you
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…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
107
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
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108
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
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109
Assignment 2Fix assignment 1
A number of groups did not submit assignment 2 or didn’t really update anything
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110
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
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111
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
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112
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
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113
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
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114
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
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115
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
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116
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
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117
Money
Lets start with the group that has the most people here
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118
Money
Thanks for the help resolving the credit card issues
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119
Flight Testing
Jim and Ed want to test Monday, Feb 24
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120
Flight Testing
Jim and Ed want to test Monday, Feb 24
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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
121
Flight Testing
Jim and Ed want to test Monday, Feb 24
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…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
122
So Given the Calendar
Work with Ken, Hong, Don, and Me
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123
Flight Test
I would like you to make all the arrangements regarding getting up to the airfield Tuesday.
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124
Money
Thanks for the help resolving the credit card issues
Today we can start with group ?
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125
Myths and TruthsMyths Gorilla Glue is no stronger than ordinary carpenters glue
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126
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
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127
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
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Ken
128
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
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129
Myths and TruthsTruthsRound holes are easier to make then not round holes
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130
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
131
You need to know where the CG isWeighted averages.
x
y
132
Mass and Aerodynamic Centers Weighted averages.
x
y
133
Mass and Aerodynamic Centers Weighted averages. Pick an origin
x
y
134
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
135
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
136
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
137
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
138
Mass and Aerodynamic Centers
x
z
51.2 cm
Once you have them…
DRAW A FREE BODY DIAGRAM
139
Mass and Aerodynamic Centers Once you have them Then sum forces andmoments
mg
thrust
Wing drag
tail drag
fuselage drag
140
Mass and Aerodynamic Centers Once you have them Then sum forces andmoments
mg
thrust
Wing drag
tail drag
fuselage dragx
z
141
Mass and Aerodynamic Centers Once you have them Then sum forces andmoments
mg
thrust
Wing drag
tail drag
fuselage dragx
z
142
Mass and Aerodynamic Centers Once you have them Then sum forces andmoments
mg
thrust
Wing drag
tail drag
fuselage dragx
z
143
Mass and Aerodynamic Centers Once you have them Then sum forces andmoments
mg
thrust
Wing drag
tail drag
fuselage dragx
z
144
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
145
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
146
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
147
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
148
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…
151
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
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