HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Apr 25, 2002, 08:23 AM
suffering gravity surge
joey221's Avatar
Westminster, CO
Joined Oct 2001
152 Posts
Compufoil question about optimum angle

hehehe, this is a hard one!

I downloaded Compufoil and loaded the SD7037 airfoil.

The program says:

"Zero-lift angle of attack = -3.29 degrees, ideal angle of attack = 0.83 degrees..."

Where does this information come from? I opened up the file which has the coordinates for the 7037 and all it is is numbers for the data points.

So, how are these numbers calculated? Does anyone know?

Joe
joey221 is offline Find More Posts by joey221
Reply With Quote
Sign up now
to remove ads between posts
Old Apr 25, 2002, 10:45 AM
Ascended Master
Sparky Paul's Avatar
Palmdale, CA
Joined Oct 2000
13,371 Posts
Go to this link.
http://www.nasg.com/afdb/search-airfoil-e.phtml
Type in your airfoil name, and select "polar"..
For the Reynolds number of interest...
http://www.nasg.com/afdb/show-polar.phtml
You'll get an image like this:
Sparky Paul is offline Find More Posts by Sparky Paul
Reply With Quote
Old Apr 25, 2002, 12:15 PM
suffering gravity surge
joey221's Avatar
Westminster, CO
Joined Oct 2001
152 Posts
Sparky Paul,

WOW! This is the mother lode! Exactly the type of stuff I'm looking for, thanks so much!

Joe
joey221 is offline Find More Posts by joey221
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Question Question about motor placement/thrust angle on wing Jagzilla Flying Wings 0 Apr 20, 2006 06:30 PM
Beginner with question about max rudder/elevator angle macafied Beginner Training Area (Aircraft-Electric) 4 Nov 20, 2004 03:25 PM
weird question about foam Mark Fitz Electric Plane Talk 6 Jun 02, 2001 02:16 PM
Question about Astro 15 geared motor ? Tom Smith Electric Plane Talk 2 May 31, 2001 10:26 PM
Question about the flash 5x jtthebiggafigga Electric Plane Talk 5 May 27, 2001 09:14 AM