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Tailplane slots in fuselage

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fklein(at)orcasonline.com
Guest

Posted: Tue Oct 23, 2007 3:22 pm Post subject: Tailplane slots in fuselage

Hi All,



Step 7 on build manual pg. 19-7 describes the required travel (4 

degrees up, 12 degrees down) of the trailing edge of the tailplane from 

a neutral position. My fuselage had a faint but discernible ridge line 

which I interpreted to be a cut-out line for the slots for the tab 

link-rod TS05 which I previously followed when cutting out the slots. 

As I now have the tailplanes mounted and am measuring to ensure they 

can achieve the required travel, I'm finding that my slots are grossly 

oversized, and most probably will be quite inviting for small birds and 

varmints. Have any of you faced the same situation?



Now that I have marked the location of the tab link-rod in the extreme 

up and down positions, and after taking into account the fore and aft 

movement of the tab link-rod and adding 1/8" clearances, my intention 

is to do some bid patching so that the slot is no larger than required.



I'm unclear as to the meaning of the last sentence on pg. 19-7 where it 

states,



	"...as the trailing edge of the tailplane is raised the trailing edge 

of the tab raises even further, the ratio being approximately 1.3 to 1. 

Therefore, when you have raised the trailing edge of the tailplane by 

12 degrees, the tab should have raised 15.6 degrees relative to the 

tailplane or 27.6 degrees from the zero start position.

A maximum total movement of 18 degrees and a minimum of 14.4 degrees 

relative to the tailplane is acceptable."



Does the last sentence intend: A maximum total movement of the trim tab 

of 18 degrees and a minimum of 14.4 degrees relative to the tailplane 

is acceptable."



Or am I really missing the point?



Fred

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rob(at)hyperion-ef.com
Guest

Posted: Tue Oct 23, 2007 4:17 pm Post subject: Tailplane slots in fuselage

In re: cutting the slots  

   

The scribe lines on my fuselage were likewise “slightly” off from the actual location (and size) so I had to practice my fiberglass repair technique in order to reduce the ridiculously large gap.  

   

   

In re: trim tab movement  

   

Read on a bit further and the intent is made clear.  The next paragraph in the manual concludes with this sentence:  “A maximum total movement of 6 degrees and a minimum of 4.8 degrees OF TAB MOVEMENT (emphasis added) relative to the tailplane is acceptable  

   

   

Best regards,  

   

Rob Housman  

Irvine, California  

Europa XS Tri-Gear  

S/N A070  

Airframe complete  

     

From: owner-europa-list-server(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of Fred Klein

 Sent: Tuesday, October 23, 2007 4:22 PM

 To: europa-list(at)matronics.com

 Subject: Tailplane slots in fuselage  

  

   

Hi All,

 

 Step 7 on build manual pg. 19-7 describes the required travel (4 degrees up, 12 degrees down) of the trailing edge of the tailplane from a neutral position. My fuselage had a faint but discernible ridge line which I interpreted to be a cut-out line for the slots for the tab link-rod TS05 which I previously followed when cutting out the slots. As I now have the tailplanes mounted and am measuring to ensure they can achieve the required travel, I'm finding that my slots are grossly oversized, and most probably will be quite inviting for small birds and varmints. Have any of you faced the same situation?

 

 Now that I have marked the location of the tab link-rod in the extreme up and down positions, and after taking into account the fore and aft movement of the tab link-rod and adding 1/8" clearances, my intention is to do some bid patching so that the slot is no larger than required.

 

 I'm unclear as to the meaning of the last sentence on pg. 19-7 where it states, 

 

 "...as the trailing edge of the tailplane is raised the trailing edge of the tab raises even further, the ratio being approximately 1.3 to 1. Therefore, when you have raised the trailing edge of the tailplane by 12 degrees, the tab should have raised 15.6 degrees relative to the tailplane or 27.6 degrees from the zero start position.

 A maximum total movement of 18 degrees and a minimum of 14.4 degrees relative to the tailplane is acceptable."

 

 Does the last sentence intend: A maximum total movement of the trim tab of 18 degrees and a minimum of 14.4 degrees relative to the tailplane is acceptable."

 

 Or am I really missing the point?

 

 Fred

 

 Navigator to much much the Web ===========  

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topglock(at)cox.net
Guest

Posted: Tue Oct 23, 2007 6:40 pm Post subject: Tailplane slots in fuselage

Fred,

 

 Realizing that the lines were only an approximation, I took care to start very small with the cuts to the fuse.  When checking for clearance, one should check full deflection in both full up trim and full down trim positions.  There is a noticeable difference in the clearance at each extreme.  I allowed approximately 1/8" all around the range...

 

 Keep pluggin' away, brother.  You'll be flying soon enough... 

 

 Jeff - Baby Blue

 336 hours

 

 Fred Klein wrote: [quote]Hi All,   

   

 Step 7 on build manual pg. 19-7 describes the required travel (4 degrees up, 12 degrees down) of the trailing edge of the tailplane from a neutral position. My fuselage had a faint but discernible ridge line which I interpreted to be a cut-out line for the slots for the tab link-rod TS05 which I previously followed when cutting out the slots. As I now have the tailplanes mounted and am measuring to ensure they can achieve the required travel, I'm finding that my slots are grossly oversized, and most probably will be quite inviting for small birds and varmints. Have any of you faced the same situation?   

   

 Now that I have marked the location of the tab link-rod in the extreme up and down positions, and after taking into account the fore and aft movement of the tab link-rod and adding 1/8" clearances, my intention is to do some bid patching so that the slot is no larger than required.   

   

 I'm unclear as to the meaning of the last sentence on pg. 19-7 where it states, 

   

 "...as the trailing edge of the tailplane is raised the trailing edge of the tab raises even further, the ratio being approximately 1.3 to 1. Therefore, when you have raised the trailing edge of the tailplane by 12 degrees, the tab should have raised 15.6 degrees relative to the tailplane or 27.6 degrees from the zero start position.   

   A maximum total movement of 18 degrees and a minimum of 14.4 degrees relative to the tailplane is acceptable."   

   

   Does the last sentence intend:   A maximum total movement of the trim tab of 18 degrees and a minimum of 14.4 degrees relative to the tailplane is acceptable."   

   

   Or am I really missing the point?   

   

 Fred   

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fklein(at)orcasonline.com
Guest

Posted: Tue Oct 23, 2007 7:08 pm Post subject: Tailplane slots in fuselage

On Tuesday, October 23, 2007, at 07:42  PM, Rman wrote:



 	  Quote: 	
		   Realizing that the lines were only an approximation, I took care to 

 start very small with the cuts to the fuse. 


	


Jeff...thanks bro'...and thank you too Rob,



Old Pennsylvania Dutch Saying: "Why Oh Why do I get so late smarter?"



Fred



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