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Hot Topic (More than 10 Replies) Leland Snow and the Air Tractor (Read 18787 times)
Sky9pilot
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Re: Leland Snow and the Air Tractor
Reply #4 - Jan 5th, 2014 at 11:40am
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great stuff Simpleflyer,

thanks for the links and I like the "Ace" scheme! Smiley

Tom
  

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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simpleflyer
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Re: Leland Snow and the Air Tractor
Reply #3 - Jan 4th, 2014 at 1:12pm
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Tom, here are some links to articles about Leland Snow.

This one gives a concise and thorough history of Snow and his aircraft.

http://www.livestockweekly.com/papers/97/10/16/whllsnow.asp

Two good pages at the Air Tractor site.

This one is about a scholarship at TX A&M in his name.  briefly describes his aircraft building as a student.

http://www.airtractor.com/es/news/2011/04/leland-snow-aerospace-engineering-scho...

Nice memorial article.

http://www.airtractor.com/about-us/history-innovation

Good video at U-tube

http://www.youtube.com/watch?v=Ev0JPb4rWUI&feature=youtu.be

Also, Al Cleave's two part article about Leland was published in a back issue of Joe Joseph's Windy Sock, now gone.  Part of it may be found at this Polish site, if the URL works.

http://modelarstwo.alianet.pl/Dokumentacja-PZL-11/pdf/the%20Windy%20Sock...pdf
  
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simpleflyer
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Re: Leland Snow and the Air Tractor
Reply #2 - Jan 4th, 2014 at 12:48pm
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Thanks, Tom, for your interest and comments.

In the initial reference sheet we worked, we were estimating an appros 5 degree incidence.  Measuring it with a protractor is comes pretty close to that.  We generally set the swingers to about 3 to 5 degrees, on some designs as little as 0 degrees has worked out OK.

Made good progress this morning in working up a set of plans to build from.  This is the first pic.

Thanks also, for the 'Dusty' idea.  I think I will go with Air Tractor's "Ace".  See him at:

http://www.airtractorforkids.com/

The bottom pic below shows how we cleaned up their cartoon and altered the smile a bit.

Al
  

( 43 KB | 113 Downloads )
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AT_ace_duo.jpg
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Sky9pilot
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Re: Leland Snow and the Air Tractor
Reply #1 - Jan 3rd, 2014 at 1:41pm
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Thanks for the step by step and the link. 

It looks like there is some positive incidence on the main wing and neg or 0 degree on the stab.  Do you have any specific incidence specs that you work from?

Looks like Disney's Dusty... any possibility of marking pens decorating you model in that scheme?
Found this at Wikipedia on the Air Tractor by  Leland Snow:
http://en.wikipedia.org/wiki/Air_Tractor

Google Leland Snow and you'll find a Memorial Tribute also but it won't let me link to it.
Tom
  

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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simpleflyer
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Leland Snow and the Air Tractor
Jan 3rd, 2014 at 12:53pm
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Leland Snow and the story of the Air Tractor is an impressive and fascinating event.  We've been an admirer of his accomplishments for a while.

We hope to model some of the aircraft that he has designed.  The first is the AT-402B.  Its simple design almost cries out to be modeled.  First we start out with a 3-vu of the plane.



One can obtain a nice PDF of this 3-vu at:

http://www.airtractor.com/aircraft/402b

Just click on the PDF link on the right side of the page.

Next we make a pattern of the aircraft shapes by making a JPG of the 3-vu and modifying it in MS paint.



From this we will make cutting patterns and a simple building plan.
  
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