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Wing root fairings

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Jaybannist(at)cs.com
Guest

Posted: Thu Mar 29, 2007 3:52 pm Post subject: Wing root fairings

Klaus,



For those of us building XLs (with flaps), what do you think would be the effect of adding only the forward part of the wing root fairings?



Jay in Dallas

alex_001

Joined: 14 Jan 2007
Posts: 61

Posted: Fri Mar 30, 2007 1:53 am Post subject: Re: Wing root fairings

i would like to hear all info about wing root fairings for xl as i am about to make some but if someone has allready done some please contact me.



Thanks

klaus(at)utdallas.edu
Guest

Posted: Fri Mar 30, 2007 11:29 am Post subject: Wing root fairings

Hi,



1. The question about efficiency of the forward portion of the wingroot 

fairing

relative to the rear portion is difficult to answer.

My guess is that much of the improvement in

low speed behavior (minimum sink rate, stall speed, climb rate with high 

payload)

comes from the rear portion, since it reduces the amount of induced drag.

The front portion reduces the extent to which the air above the wing

gets compressed by the expanding fuselage.

Thus, these are really different effects. For details,

see the paper "Finding Hidden Drag" listed on the website



http://www.utdallas.edu/~klaus/Airplane/wing_root_fairing.html



2. If I were building an XL, I would forget about flaps altogether and 

instead

would add fixed trailing edges and the wing root fairings.

This would eliminate the flap mechanism entirely.



Maybe, just maybe, somebody will make fairings for the XL, then make 

molds, and

make additional fairings available to others at reasonable expense. It would

be a nice modification.



Best wishes,



Klaus



-- 

Klaus Truemper

Professor Emeritus of Computer Science

University of Texas at Dallas

Erik Jonsson School of Engineering and

  Computer Science EC31

P.O. Box 830688

Richardson, TX 75083-0688

(972) 883-2712

klaus(at)utdallas.edu

www.utdallas.edu/~klaus

Canatukker

Joined: 03 Feb 2007
Posts: 12
Location: Mission(Hatzic lake)B.C. Canada

Posted: Sat Nov 03, 2007 2:22 am Post subject: Re: Wing root fairings

 	  Jaybannist(at)cs.com wrote: 	
		  Klaus,



For those of us building XLs (with flaps), what do you think would be the effect of adding only the forward part of the wing root fairings?



Jay in Dallas 	
  



 I have had my zodiac 601 UL from Feb. this Year and found the plane to glide like a rock and fly  with a  nose high attitude ,also the stall speed I found somewhat high . after reading Klaus's report on the Wing-root fairings and the phenomenal numbers of improvement on his HDS  i could not wait to try it so weaponed  with a roll of ductape  I went to the airport and made fairings on the front part of the wing-root (works like magic) and went flying , the airplane is NOT the same anymore , she fly's like all the (Canadian 1232 lb max) ultralights I have been flying with a level attitude (I can now see over the nose ) specially on landing  because we have a much better glide ,I have had not a lot off time to test all exact numbers ,but think Thad stall speed has not much changed yet(no fairing on back part of wing YET )  I LOVE MY REBORN PLANE !! and can hardly wait to bring out the fiberglass and make the fairings permanent   Thanks Klaus for your research . if any of You guy's have experience with wing-root fairing please let me know .  Ron Smit from a rainy Abbotsford  Canada B.C.  C-FNSR

_________________
Have fun fly safe

daveaustin2(at)primus.ca
Guest

Posted: Sat Nov 03, 2007 3:34 am Post subject: Wing root fairings

Ron Smit,

I made fibreglas wing root fairings ten years ago.  Somewhat like a 

Spitfire.  Found the biggest effect was on climbout (better) and less 

turbulence on the horizontal stab/elevators.

Will send a picture if you send me your email.

Dave Austin  601HDS - 912, Spitfire Mk VIII   daveaustin2(at)primus.ca

gfmjr_20(at)HOTMAIL.COM
Guest

Posted: Sat Nov 03, 2007 4:39 am Post subject: Wing root fairings

Dave

   I'd like to see your fairings and I'm sure other on the list would also. Can you post those pictures for everyone to see?

  

 George May

 601XL 912s 166 hours



 	  Quote: 	
		   From: daveaustin2(at)primus.ca

 To: zenith-list(at)matronics.com

 Subject: Re: Re: Wing root fairings

 Date: Sat, 3 Nov 2007 07:31:03 -0400

 

 --> Zenith-List message posted by: "Dave Austin" <daveaustin2(at)primus.ca>

 

 Ron Smit,

 I made fibreglas wing root fairings ten years ago. Somewhat like a 

 Spitfire. Found the biggest effect was on climbout (better) and less 

 turbulence on the horizontal stab/elevators.

 Will send a picture if you send me your email.

 Dave Austin 601HDS - 912, Spitfire Mk VIII daveaustin2(at)primus.ca 

 

===
	


 	  Quote: 	
		   

 

 


	


Boo! Scare away w' target='_new'>Try now!  [quote][b]

zodierocket(at)hsfx.ca
Guest

Posted: Sat Nov 03, 2007 6:09 am Post subject: Wing root fairings

The pictures of Daves wing root fairings are on www.ch601.org   

     

Mark Townsend  Alma, Ontario  

Zodiac 601XL C-GOXL, CH701 just started  

www.ch601.org / www.ch701.com/ www.Osprey2.com  

  

--

purplemoon99(at)bellsouth
Guest

Posted: Sat Nov 03, 2007 6:58 am Post subject: Wing root fairings

Intrested in your wings    Joe N101HD

---

Canatukker

Joined: 03 Feb 2007
Posts: 12
Location: Mission(Hatzic lake)B.C. Canada

Posted: Sat Nov 03, 2007 9:21 am Post subject: Re: Wing root fairings

Ok don`t laugh I have a link to some pictures of this very successful test .

  

http://picasaweb.google.ca/10avion/WingRootTest

Fly save have fun  Ron.

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_________________
Have fun fly safe

zodierocket(at)hsfx.ca
Guest

Posted: Sat Nov 03, 2007 3:28 pm Post subject: Wing root fairings

You must be Canadian, If not then Red Green would be just so proud!!!



Mark Townsend  Alma, Ontario

Zodiac 601XL C-GOXL, CH701 just started

www.ch601.org / www.ch701.com / www.Osprey2.com

do not archive

--

daveaustin2(at)primus.ca
Guest

Posted: Sat Nov 03, 2007 3:44 pm Post subject: Wing root fairings

Wing root fairings.

Dave Austin  601HDS - 912, Spitfire Mk VIII

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