CAD 101/102 - Scale Model Airplane Design

Right to Use

This class is now free to use, but please don't download and distribute. Also, I retain the copyright, so this material cannot be used for any commercial purposes or sale of any kind without my permission.

I don't want to see this material up for sale on eBay by someone else :-) That's what will happen if people start passing it around.

If you have trouble downloading or viewing the files, please send me email at gary.hethcoat@gmail.com

For general info about this class, see CAD Class Information.

The CAD files from the class are available for download here:
D4Y2_Judy_color.bmp
D4Y2_Judy_work4.TCW
D4Y2_Judy_work5.dxf
D4Y2_Judy_work5.TCW
Klemm35_work4.dxf
Klemm35_work4.TCW
Klemm_35_01.bmp
Klemm_35_02.bmp
Klemm_35_03.bmp
Klemm_35_04.bmp
right_hand_rule.png

If you want to participate in the Google group that was created for the original class, you can request membership here:
http://groups.google.com/group/cad-class-registered
Look for the "Join Group" link.

If you have any feedback or suggestions, please also let me know.

Gary Hethcoat, Wings on the Web

Class Content - CAD 101 (four sessions)

For details on the course and software, see:
CAD Class Information.

CAD 101 - Session 1

To download files, either Shift-left-click or Right-click then "Save As".

WebEx (ARF) Recording - CAD 101 Section 1 Session 1

WebEx (ARF) Recording - CAD 101 Section 2 Session 1

TurboCAD Interface

• Menus
• Toolbars
• Coordinate Entry
• Message Bar
• Coordinate Space
• Method - list vs. discovery

Importing and Tracing Raster Images

• Image Formats (JPG, BMP, etc.)
• Tools (Image editor) http://www.freeserifsoftware.com/software/photoplus/
• Insert -> Picture -> As Object
• Reference Lines

CAD 101 - Session 2

To download files, either Shift-left-click or Right-click then "Save As".

WebEx (ARF) Recording - CAD 101 Section 1 Session 2

WebEx (ARF) Recording - CAD 101 Section 2 Session 2

Justifying & Aligning the Raw Tracings

• Rotation & Scaling
• Cleaning up the drawing
• Grouping Objects

Scale & Size considerations

• Using reference lines and symmetry
• Scaling commands and procedures
• Model size considerations (Giant/peanut, accessories, Reynolds number)
• Removing unnecessary detail
• Power requirements
• Accessories (availability)
• Stock & sheet sizes

Bulkhead (former) and Rib/Spar placement

• Spacing formers & ribs
• Interior components
• Wing/fuse and wing/tail interface

Laying out Fuselage Formers

• Thickness (offset)
• Making reference polylines (bounding box)
• Cross section - splines
• Interpolation - lofting
• Fuse construction method (e.g. crutch)

CAD 101 - Session 3

Former Design; Lofting

• Dividing line segments
• Construction methods; crutch, box, stilts/jig
• Fuselage shape & curvature
• Offset command; sheeting
• Stringer size & placement

To download files, either Shift-left-click or Right-click then "Save As".

WebEx (ARF) Recording - CAD 101 Section 1 Session 3

WebEx (ARF) Recording - CAD 101 Section 2 Session 3

CAD 101 - Session 4

Misc. Commands

• Explode-Join (polylines, figures)

Wing Design

• Airfoil selection - using Profili2 - UIUC Airfoil Database - http://www.ae.uiuc.edu/m-selig/ads.html
• Incidence - wing & stab
• LE & Spar layout
• Rib design & layout
• Aileron & Flap placement
• Landing gear support

Printing & Plotting

To download files, either Shift-left-click or Right-click then "Save As".

WebEx (ARF) Recording - CAD 101 Section 1 Session 4

WebEx (ARF) Recording - CAD 101 Section 2 Session 4

Class Content - CAD 102 (four sessions)

Class Project Review