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Mounting horrizonal stab

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madriver(at)wildblue.net
Guest

Posted: Fri Jan 01, 2010 11:04 am Post subject: Mounting horrizonal stab

OK you Gurus of 701;

  

 I'm in a quandary on two points:

  

 One - when you figure the elevator deflection up and down.  Do you start from neutral on the top of the elevator and use an electronic level?  Or do you (if your using a level) start from a line from the hinge pin - center of rotation - to the center of the trailing edge.  Don't want to build the jig as shown on Zenith drawings if I don't have to.

   

 Now the next question - when mounting the horizontal stabilizer to the fuselage it shows a dimension of 135 mm from the top of the spar - front and rear - to an A-E reference line.  If I do this the lower elevator horn seems  to have a lot of interference to the upper  rudder mounting plate.  It shows to "cut out the offending area" but that would really "bite" into the elevator horn structure in my situation. Can you mount the stab higher to aviod some of this or what.

   

 Is there a trick that I can't seem to resolve - let me know ASAP - I've already spent the morning in the shop trying to sort this out.

  

 Thanks

  

 Phil

  

 701 - Buhl ID - only a few more bolts

  [quote][b]

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agibeaut

Joined: 21 Mar 2007
Posts: 64

Posted: Fri Jan 01, 2010 12:50 pm Post subject: Mounting horrizonal stab

I had the same quandary, but it all worked out in the end. Mounting the horiz. stab. too high will cause problems later when you install the cables. There won't be adequate clearance and you'll end up cutting the hole in the front of the stab. lower. 



One of the guys that responded to my problem here advised me NOT to alter the elevator horn but rather make accommodations with the L angle that it interferred with and that was the right solution. I just added a backer to the angle and cut out for clearance.



I made the top of the Horizontal Stab. parallel to the AE line and then measured my elevator deflections from the top of the stabilizer. The guys here told me that I'll never see full down deflection anyway so not to worry about it. 



They were right and it all worked itself out. It is like a whole series of small compromises, none too radical, and making sure you are looking far enough ahead before you make a cut or drill a hole. Good luck and let us know how it works out. 



--- On Fri, 1/1/10, philip smith <madriver(at)wildblue.net> wrote:



 	  Quote: 	
		   From: philip smith <madriver(at)wildblue.net>

 Subject: Mounting horrizonal stab

 To: zenith701801-list(at)matronics.com

 Date: Friday, January 1, 2010, 12:23 PM

 OK you Gurus of 701;

  

 I'm in a quandary on two points:

  

 One - when you figure the elevator deflection up and

 down.  Do you start from neutral on the top of the

 elevator and use an electronic level?  Or do you (if your

 using a level) start from a line from the hinge pin - center

 of rotation - to the center of the trailing edge. 

 Don't want to build the jig as shown on Zenith drawings

 if I don't have to.

 

  

 Now the next question - when mounting the horizontal

 stabilizer to the fuselage it shows a dimension of 135 mm

 from the top of the spar - front and rear - to an A-E

 reference line.  If I do this the lower elevator

 horn seems  to have a lot of interference to the upper

  rudder mounting plate.  It shows to "cut out the

 offending area" but that would really "bite"

 into the elevator horn structure in my situation. Can you

 mount the stab higher to aviod some of this or what.

 

  

 Is there a trick that I can't seem to resolve -

 let me know ASAP - I've already spent the morning in the

 shop trying to sort this out.

  

 Thanks

  

 Phil

  

 701 - Buhl ID - only a few more bolts

 

 

 

 

 


	


__________________________________________________

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ggower_99(at)yahoo.com
Guest

Posted: Sun Jan 03, 2010 11:24 pm Post subject: Mounting horrizonal stab

I installed everything as the plans,  made the Jig (no big deal).

 280 hrs of great fun flying...  is worth it.

  

 Saludos

 Gary Gower

 701 912S

 Flting from Chapala, Mexico.



--- On Fri, 1/1/10, philip smith <madriver(at)wildblue.net> wrote:



  	  Quote: 	
		  

From: philip smith <madriver(at)wildblue.net>

Subject: Mounting horrizonal stab

To: zenith701801-list(at)matronics.com

Date: Friday, January 1, 2010, 1:23 PM



  OK you Gurus of 701;

  

 I'm in a quandary on two points:

  

 One - when you figure the elevator deflection up and down.  Do you start from neutral on the top of the elevator and use an electronic level?  Or do you (if your using a level) start from a line from the hinge pin - center of rotation - to the center of the trailing edge.  Don't want to build the jig as shown on Zenith drawings if I don't have to.

  

 Now the next question - when mounting the horizontal stabilizer to the fuselage it shows a dimension of 135 mm from the top of the spar - front and rear - to an A-E reference line.  If I do this the lower elevator horn seems  to have a lot of interference to the upper  rudder mounting plate.  It shows to "cut out the offending area" but that would really "bite" into the elevator horn structure in my situation. Can you mount the stab higher to aviod some of this or what.

  

 Is there a trick that I can't seem to resolve - let me know ASAP - I've already spent the morning in the shop trying to sort this out.

  

 Thanks

  

 Phil

  

 701 - Buhl ID - only a few more bolts

 	  Quote: 	
		  



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