Advanced Cambered Wing Tractor (oz3802)
About this Plan
Goldberg Advanced Tractor.
Quote: "Here are plans for a 150 sq inch indoor microfilm covered tractor by the great Carl Goldberg published in a Chicago Park District handbook from 1938. I got it as a reprint by Charlie Bauer of 4Pi, Inc. The airfoil has about 6.7% camber (3/8 inch per 5.5 inch chord) and is TLAR, matching a French curve I have. These days a 4-6% camber Simplex (logarithmic spiral) airfoil would probably be used, since it is easier to trim to the elliptical plan. In those days, when a computer had 2 legs and a pencil behind his/her ear, French curves were much in use. An article on wing design by Avrum Zier on wing design in Flying Aces November 1934 called for a No.13 French curve to make airfoils, with high point at 30% of chord.
Did we get something wrong with these details about this plan (especially the datafile)?
That happens sometimes. You can help us fix it.
Add a correction
Advanced Cambered Wing Tractor
by Carl Goldberg
from Chicago Park District handbook
all formers complete :)
Found online 19/12/2012 at:
Format: • PDFbitmap
Do you have a photo you'd like to submit for this page? Then email firstname.lastname@example.org
User commentsNo comments yet for this plan. Got something to say about this one?
Add a comment
* Credit field
The Credit field in the Outerzone database is designed to recognise and credit the hard work done in scanning and digitally cleaning these vintage and old timer model aircraft plans to get them into a usable format. Currently, it is also used to credit people simply for uploading the plan to a forum on the internet. Which is not quite the same thing. This will change soon. Probably.
This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.
© Outerzone, 2011-2020.
All content is free to download for personal use.
For non-personal use and/or publication: plans, photos, excerpts, links etc may be used, provided that full and clear credit is given to Outerzone with appropriate and specific direction to the original content i.e. a direct hyperlink back to the Outerzone source page.
Unauthorized use and/or duplication of this material without express and written permission from this site's owner is strictly prohibited. If we discover that content is being stolen, we will consider filing a formal DMCA notice.