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

No Airfoil deltas

Reply

Old 03-23-2003, 07:46 PM
  #1  
micboy
Member
Thread Starter
 
Join Date: Jan 2003
Location: Qormi, MALTA
Posts: 55
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default No Airfoil deltas

Hi i am new to these fast planes and i only have one question.

If i make a delta plane with no airfoil (flat) from 4m corex would it be faster from the same design but with a bit of airfoil.

both planes are powered with the same engine and prop.


thank you
michael
micboy is offline  
Reply With Quote
Old 03-24-2003, 01:54 AM
  #2  
banktoturn
Senior Member
 
Join Date: Aug 2002
Location: Bloomington, MN,
Posts: 762
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default No Airfoil deltas

micboy,

A decent airfoil should be faster.

banktoturn
banktoturn is offline  
Reply With Quote
Old 03-24-2003, 02:59 AM
  #3  
Rudeboy
 
Rudeboy's Avatar
 
Join Date: Dec 2002
Location: Kortessem, BELGIUM
Posts: 3,508
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default No Airfoil deltas

4mm correx is not sturdy enough to go really fast in my opinion... otoh if it fails in flight you haven't wasted a lot of $...
Rudeboy is offline  
Reply With Quote
Old 03-24-2003, 03:01 AM
  #4  
Bob Payne
Senior Member
My Feedback: (8)
 
Join Date: Sep 2002
Location: Charlotte, TN
Posts: 348
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default No Airfoil deltas

I bought a Arf of a Delta SPAD at the huntsville swap meet
yesterday and put an os fp15 this thing hauls but
its yellow with a black tail fin looks like a bumble bee coming at you,
i'd say its running about 60-70mph plenty fast for the size and 15fp.
Attached Thumbnails Click image for larger version

Name:	65223_14633.jpg
Views:	6
Size:	44.2 KB
ID:	39961  
Bob Payne is offline  
Reply With Quote
Old 03-24-2003, 03:18 AM
  #5  
FlooredCOBRA
Senior Member
 
Join Date: Aug 2002
Location: Hampton, GA
Posts: 1,551
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default No Airfoil deltas

I would try both designs and see what you like better. Try one flat and other with airfoil. You would be surprised on how much drag you save by keeping the servos inside of fuse, or wing.

low drag = more speed
FlooredCOBRA is offline  
Reply With Quote
Old 03-24-2003, 08:08 AM
  #6  
micboy
Member
Thread Starter
 
Join Date: Jan 2003
Location: Qormi, MALTA
Posts: 55
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default No Airfoil deltas

the moment I am building the flat one with no airfoil from 4mil corex regarding the stiffness is ok because I have reinforced it
With two L channels of aluminum the total weight with the fuel tank empty is 1.5kg what do you think of the total weight?

BTW: I only have a OS46Fx standard muffler what do you think is the best prop for it. On this delta planes

Thank you,
micboy is offline  
Reply With Quote
Old 03-24-2003, 11:48 PM
  #7  
FlooredCOBRA
Senior Member
 
Join Date: Aug 2002
Location: Hampton, GA
Posts: 1,551
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default No Airfoil deltas

APC 9 X 7

Topflight wooden Pylon 9 X 7

I had good results with both these props on my OS 46FX. I liked the wooden better because it had instant revs. Kind of acted like a light weight flywheel.
FlooredCOBRA is offline  
Reply With Quote
Old 03-25-2003, 12:23 AM
  #8  
Rudeboy
 
Rudeboy's Avatar
 
Join Date: Dec 2002
Location: Kortessem, BELGIUM
Posts: 3,508
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default No Airfoil deltas

A light wooden prop IS a lightweight flywheel... that's why it acts like one...
Rudeboy is offline  
Reply With Quote
Old 03-25-2003, 12:41 AM
  #9  
FlooredCOBRA
Senior Member
 
Join Date: Aug 2002
Location: Hampton, GA
Posts: 1,551
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default No Airfoil deltas

I guess it is a flywheel....lol...

well anyways y'all know what I mean. :bananahea
FlooredCOBRA 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