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ME 442 Senior Project. Week 9 Dr. Joseph Vignola Pangborn G43, Phone 202-319-6132, [email protected] Tuesdays & Thursdays, 9:40-12:20 AM, Pangborn G43 Office Hours: Tuesdays, 1:00-2:00 PM. The Rest of the Semester. Welcome back from break. The Rest of the Semester.

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ME 442 Senior Project

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ME 442 Senior Project

Week 9

Dr. Joseph Vignola

Pangborn G43, Phone 202-319-6132, [email protected]

Tuesdays & Thursdays, 9:40-12:20 AM, Pangborn G43

Office Hours: Tuesdays, 1:00-2:00 PM


The Rest of the Semester

Welcome back from break


The Rest of the Semester

Each 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


Purchases

I need to see the Excel budgets today and everyday

I want to be sure we are keeping

careful track of all expenses.


The Rest of the Semester

Presentations


The Rest of the Semester

Presentations

I will make a schedule and send it out


The Rest of the Semester

Presentations

I will make a schedule and send it out

I will try to do this by tomorrow.


Things to Purchase

DC-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 tester

Heat gun, iron, and monocoat

Tools each team must have their own flight toolbox


First Presentations

The first set of Individuals presentations starting next week.

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


First Presentations

The first set of Individuals presentations starting next week.

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


First Presentations

We 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


What to Include

We 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


What to Include

We 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


What Not to Include

No need to discuss

safety issues

How you used your time

Where 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


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

Issue 1: Information Rich Title Pages

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


Writing & Presentation Issues

Issue 2: 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.


Writing & Presentation Issues

Issues 1&2 Corollary: Sections Titles

Use logical sections and subsections

Title each so that so that the content is obvious


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.


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.


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


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.


Section Titles

Use logical sections and subsections

Title each so that so that the content is obvious


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


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.


Refine Documentation

Each member of the group should be sure that you bring ALL electronic files everyday

SolidWorks drawings


Documentation

Each member of the group should be sure that you bring all electronic files everyday

SolidWorks drawings

Excel budget and receipts

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


Documentation

Each member of the group should be sure that you bring all electronic files everyday

SolidWorks drawings

Excel budget, must be this version or have this information

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


Documentation

Each member of the group should be sure that you bring all 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


Documentation

Please bring all your electronic files everyday

SolidWorks drawings

Excel budget

It’s best to use the document that I started

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


Documentation

Please bring all your electronic files everyday

SolidWorks drawings

Excel budget

It’s best to use the document that I started

It’s on the class web page

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


Design Support Documents

  • 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.

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


Design Support Documents

3) Cost budget & parts inventory

A 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 inventory

A 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 protocols

Read 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.

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


Design Support Documents

3) Cost budget & parts inventory

A 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 inventory

A 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 protocols

Read 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

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


Group Purchases

We need to purchase:

charger

Charge level indicator

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


SAE Reports

Please don’t resubmit last semesters reports

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


Materials and Purchasing

It is very import that we straighten the budget today

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


Materials and Purchasing

It is very import that we straighten the budget today

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


Materials and Purchasing

It is very import that we straighten the budget today


Materials and Purchasing

It is very import that we straighten the budget today


Materials

I can cut materials for you to any dimension, exactly to the dimensions you give me.


Expediency

Be sure you are making design decisions based on engineering principles.

Please don’t

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


Materials

Ask Ken to bring specific material you need

Ken

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


Materials and Purchasing

It is very import that we straighten the budget today

There are problems with the credit card

MNEY


Materials and Purchasing

It is very import that we straighten the budget today

There are problems with the credit card

MNEY

The card problems include the lost receipts from this class


Materials and Purchasing

e-mail Hong right away to schedule time

She is nicer that I am and will help you


Flight Testing

Jim and Ed want to test Tuesday, Feb 25

That’s 7 days off

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


Flight Testing

I’m hoping that Ken will schedule and do the technical inspection and taxi tests with you

…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

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


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


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


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


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


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


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


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


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


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


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


Money

Lets start with the group that has the most people here

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


Money

Thanks for the help resolving the credit card issues

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


Flight Testing

Jim and Ed want to test Monday, Feb 24

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


Flight Testing

Jim and Ed want to test Monday, Feb 24

I’m still working on this but the big issues is

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


Flight Testing

Jim and Ed want to test Monday, Feb 24

…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

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


So Given the Calendar

Work with Ken, Hong, Don, and Me

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


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


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


Myths and Truths

Myths

Gorilla Glue is no stronger than ordinary carpenters glue

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


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


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

Ken

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


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


Myths and Truths

Truths

Round holes are easier to make then not round holes

Taken from http://patheoldminer.rootsweb.ancestry.com/faybuffington.html


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


You need to know where the CG is

Weighted averages.

y

x


Mass and Aerodynamic Centers

Weighted averages.

y

x


Mass and Aerodynamic Centers

Weighted averages. Pick an origin

y

x


Mass and Aerodynamic Centers

Weighted averages. Pick an origin, make a table

y

x


Mass and Aerodynamic Centers

Weighted averages. Pick an origin, make a table

y

x

51.2 cm


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

z

x

These drag forces occur at specific locations

These location must be determined

Once you have them

51.2 cm


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

z

x

These drag forces occur at specific locations

These location must be determined

Once you have them

51.2 cm


Mass and Aerodynamic Centers

Once you have them…

z

DRAW A FREE BODY DIAGRAM

x

51.2 cm


Mass and Aerodynamic Centers

Once you have them

Then sum forces and

moments

tail drag

Wing drag

fuselage drag

thrust

mg


Mass and Aerodynamic Centers

Once you have them

Then sum forces and

moments

tail drag

z

Wing drag

x

fuselage drag

thrust

mg


Mass and Aerodynamic Centers

Once you have them

Then sum forces and

moments

tail drag

z

Wing drag

x

fuselage drag

thrust

mg


Mass and Aerodynamic Centers

Once you have them

Then sum forces and

moments

tail drag

z

Wing drag

x

fuselage drag

thrust

mg


Mass and Aerodynamic Centers

Once you have them

Then sum forces and

moments

tail drag

z

Wing drag

x

fuselage drag

thrust

mg


Mass and Aerodynamic Centers

This summing for moments is precisely the same as the weighted average

z

x

51.2 cm


You MUST include this information

This summing for moments is precisely the same as the weighted average

z

x

So have a figure with YOUR plane, a coordinate system, and the location of the centers

51.2 cm


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


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


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


ME 442 Senior Project

Week 3

Dr. Joseph Vignola

Pangborn 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

[email protected]

Today I would like to see Excel budgets


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