Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Delta designing

Reply

Old 06-15-2003, 05:12 PM
  #1  
JoelD
Junior Member
Thread Starter
 
Join Date: Jun 2003
Location: Columbia, MS
Posts: 15
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Delta designing

I searched as many post as I can find and it seems that SD8020 is a pretty good airfoil for a delta and I guess about 90 angle for the LE sweep? Its gonna be a 40 so I guess about 35" span 23"long and 5.5" outer edge (sorta trying to copy Whiplash but have no actual specs other than span)
I finally found a program to print the airfoil and its about 2.25" thick and that seems like a lot so am I supposed to flatten the airfoil some kinda way?

Joel
JoelD is offline  
Reply With Quote
Old 06-16-2003, 12:54 AM
  #2  
Rudeboy
 
Rudeboy's Avatar
 
Join Date: Dec 2002
Location: Kortessem, BELGIUM
Posts: 3,508
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Delta designing

2.25".... Waaaaaayyy to thick...

You need a 5% thickness airfoil...

These planes don't fly like normal planes... you have a big ass engine on a small ass plane... a thick wing is needed to fly slow... you don't need to fly slow...

So choose thinner airfoil... something like a NACA 64A005...
Rudeboy is offline  
Reply With Quote
Old 06-16-2003, 05:33 AM
  #3  
JoelD
Junior Member
Thread Starter
 
Join Date: Jun 2003
Location: Columbia, MS
Posts: 15
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Delta designing

uhhhh......you got any idea where to find at least a drawing of it? I can't find anything about 64A005, other than it exist. Its not here " http://www.aae.uiuc.edu/m-selig/ads/coord_database.html " I looked around some more and it seems that the max thickness should be about 40% of chord for speed and I found NA64-006 that seems pretty good.....what do yall think?

Thanks,
Joel
JoelD is offline  
Reply With Quote
Old 06-16-2003, 09:29 AM
  #4  
Rudeboy
 
Rudeboy's Avatar
 
Join Date: Dec 2002
Location: Kortessem, BELGIUM
Posts: 3,508
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Delta designing

The NACA 64A-006 is basically the same airfoil as a NACA 64A-005, except for the fact that it is 1% thicker of course... That one would serve your purpose too.

Did you know you can generate NACA airfoils with Profili 2.11? NACA airfoil shapes are calculated mathematically, so the combinations are virtually infinite...
Rudeboy is offline  
Reply With Quote
Old 06-17-2003, 01:14 AM
  #5  
JoelD
Junior Member
Thread Starter
 
Join Date: Jun 2003
Location: Columbia, MS
Posts: 15
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Delta designing

Thanks.....I didn't see that....I was using profili to find an airfoil (library) and I didn't realize you could make any naca airfoil by just putting in the # that is awesome. now I just need some more ink for my printer and I'm set.

Thanks,
Joel
JoelD is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service