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Sabrina Re: pitching the H-stab
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gcfinlay(at)rogers.com
Guest

Posted: Tue Feb 19, 2008 8:35 am Post subject: Sabrina Re: pitching the H-stab

Seems to me, I heard Chris H. at a seminar  talking about measuring the distance of the joystick from the panel when trimmed  at cruise, then checking how streamlined the elevator looks when on the  ground... assuming then you reiterately adjust the stabilizer?

  

 I have a poor memory so "results may vary"  (;^>

  

 Cheers,

              Greg

 [quote]   --

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NYTerminat(at)aol.com
Guest

Posted: Tue Feb 19, 2008 8:45 am Post subject: Sabrina Re: pitching the H-stab

Dave, That is my dilemma, I'm not sure it will work.  With all the chat about the 601's and their improvement in cruise it has me  wondering.

  

 Bob

  

  

 In a message dated 2/19/2008 11:23:24 A.M. Eastern Standard Time,  daveaustin2(at)primus.ca writes:

  	  Quote: 	
		     Bob,

   The slot was about 1/4 inch long before I got it    the way I wanted.  Be sure to leave good edge clearance to the    slot!

   Re other notes, I haven't been able to figure out    how you can put the nose down without losing height, since the wing incidence    would change from level flight.  If the flaps or ailerons are adjusted    for greatest speed, I understand that, but then wouldn't you want to adjust    the hor. stab for trim neutral?

   Dave Austin  601HDS - 912, Spitfire Mk    VIII

 	  Quote: 	
		  



	
	


 

  



Delicious ideas to please the pickiest eaters. Watch the video on AOL Living.

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bryanmmartin

Joined: 10 Jan 2006
Posts: 1018

Posted: Tue Feb 19, 2008 9:02 am Post subject: Sabrina Re: pitching the H-stab

Re-pitchingLowering the flaps usually brings the nose down in the same way as changing the angle of incidence of the main wing. Re-pitching the horizontal stabilizer will not have much effect on the nose high attitude of the plane, it will just change the trim geometry.



On Feb 19, 2008, at 8:07 AM, n801bh(at)netzero.com (n801bh(at)netzero.com) wrote:

 	  Quote: 	
		  

Hi Bob. I built my 801 as close to the specs as I could and measured my wing and horizontal stabilizer incidence multiple times. I am very confident I have my plane right and it to flys nose up. If I set it up in level  cruise flight and add just a little bit of flaps the nose drops a couple of degrees and it picks up about 4 mph. I don't know if I want to try to change the tail setting cause mine is all painted and it will be major surgery to switch.



 

  





 	  Quote: 	
		  Hi all,

  

 With all the talk of pitching the horizontal stabilizer lately I have a quick question. I am doing my conditional inspection on my 701 and decided to replace the front horizontal stabilizer brackets to the .063 material. There were no cracks in my old ones but I figured I might as well bite the bullet now while the weather is keeping me from flying anyway. I have always felt that I was flying in a nose high attitude while at cruise and that I do not see the higher MPH that others see. I purchased a digital level and have discovered that my horizontal stabilizer was about a half of a degree low in the front (approx 3 mm). I plan on raising it one degree so that I will be a half of a degree higher in the front based on the A-E line. I am wondering if this is a good idea as I believe this will get me flying in a better attitude at cruise and pick up some speed. Any thoughts?

  

 Bob Spudis

 N701Zx/ CH-701/ 912S/ 140hrs

  

	


	




 -- 

Bryan Martin

N61BM, CH 601 XL,

RAM Subaru, Stratus redrive.

do not archive.



 



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_________________
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive.

jmcburney(at)pobox.com
Guest

Posted: Wed Feb 20, 2008 6:55 am Post subject: Sabrina Re: pitching the H-stab

Hi, Ben,



Have you considered adjusting the flap pushpull tube to position the

flaperons to give you that little bit that gives you the "sweet spot" pitch

attitude and the 4 mph?  Seems to me that would be your best "no-flap"

setting.



Blue skies and tailwinds



Jim

CH-801

DeltaHawk diesel

Augusta GA

90% done, 90% left

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n801bh(at)netzero.com
Guest

Posted: Wed Feb 20, 2008 2:26 pm Post subject: Sabrina Re: pitching the H-stab

Hi Jim.. My conditional inspection is coming up next month and that is exactly what I am going to do, The adjustment is rather simple as all I need to do is slide the limit switch in the flap motor to make it stop sooner. As you being a fellow 801 builder knows we cannot change the main wing angle of incidence because the area we have to drill through for the spar bolts is not a large enough surface to make any adjustments. There will be an edge distance issue in both the front and rear spars if I alter it. 

Tailwinds and do not archive

Ben Haas

N801BH

www.haaspowerair.com



-- "Jim McBurney" <jmcburney(at)pobox.com> wrote:

--> Zenith-List message posted by: "Jim McBurney" <jmcburney(at)pobox.com>



Hi, Ben,



Have you considered adjusting the flap pushpull tube to position the

flaperons to give you that little bit that gives you the "sweet spot" pitch

attitude and the 4 mph?  Seems to me that would be your best "no-flap"

setting.



Blue skies and tailwinds



Jim

CH-801

DeltaHawk diesel

Augusta ================================================================================================================================================                      -Matt Dralle========================================

 



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