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Balanced ailerons

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VE3LVO(at)rac.ca
Guest

Posted: Sat Nov 11, 2006 2:13 pm Post subject: Balanced ailerons

Cheers........

            I balanced the ailerons by guessing at the added weight of two 

layers of colour, and when the Family Painter finished with them, they now 

hang off the hinges about 20deg off the horizontal, trailing edge up. That 

means to me that the finish is lighter than expected. Since both are the 

same, I conclude that balanced or not, I'm "pretty close".

            My understanding (meagre as it is) of flutter leads me to 

believe that balanced or not they oppose one another - so - What is the harm 

in leaving them slightly lighter than the weights?

            I would be interested in some discourse on the topic. Remember 

I'm a flier, not a builder, so not too many 'sigmas' or 'mu to the one point 

three power'.  The fact is the finish is superb and I am loath to start 

drilling into these creatures just to be mathematically perfect.

            Have at me.

Ferg Kyle

Europa A064 914 Classic

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NevEyre(at)aol.com
Guest

Posted: Sat Nov 11, 2006 3:21 pm Post subject: Balanced ailerons

Hi Ferg,

 The fact that the ailerons are connected [ via rigid pushrods] will have no  effect if one of them decides to flutter, it will thrash the pushrods for the  few nano seconds it is still attached to the wing, and departs........

 The ideal situation is for them to be 100 percent balanced, ie the CHORD  line of the aileron is level, underbalanced [ hanging down at the trailing edge]  is an absolute No No, overbalanced is OK, but not the amount you have  described.Book Read Engineers will be able to tell you the flutter speeds [250  plus kts...] just do it as per the manual, the flight test program [ Pete Clark]  took it way past what was needed.

 It really is an easy job drilling out the exess lead, use a sharp drill  at very slow speed, and if you can , clamp a piece of 1/8'' ply to the face  [ inboard is best, less visible] and drill through the ply into the arm. Keep  the ply clamped tightly,[ protect the other face with a similar piece of ply to  protect the paint] don't let the drill bit ''grab''.Start with about  3/16'', work up in stages to 1/2'.

 Chances are you will need two 1/2'' holes drilled nearly through both arms  to get close, if you do not break out the other end, all that is needed is a  plug of blue foam 5 minuted in, a smear of Expancell, and a lick of paint to  refinnish the inboard face.

 Best way I have found for drilling, is to fold a towel up , place it on the  floor and stand the outboard tip of the aileron on the towel, and drill down  into the inboard face of the arms, tape a plastic bag around the arm so most of  the swarfe gets caught, rather than getting inbedded in the towel / tip.

 Cheers,

 Nev.

  [quote][b]

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96victor(at)gmail.com
Guest

Posted: Sat Nov 11, 2006 3:22 pm Post subject: Balanced ailerons

Hi Ferg

  

 I think that you are probably correct in that they must be pretty close to balance and since they both deviate the same way flutter should cancel out.  Still it might always deep inside "bug you."  It would be easy to drill a small amount until they were perfect and the holes would be easy to fill and if they were on the upper surface no one would know. 

  

 Just think how much lighter the bird would be!

  

 Tom Friedland (Now back in the NorthWest)

 

 On 11/11/06, Fergus Kyle <VE3LVO(at)rac.ca (VE3LVO(at)rac.ca)> wrote: [quote]--> Europa-List message posted by: "Fergus Kyle" <VE3LVO(at)rac.ca  (VE3LVO(at)rac.ca)>



Cheers........

           I balanced the ailerons by guessing at the added weight of two

layers of colour, and when the Family Painter finished with them, they now

hang off the hinges about 20deg off the horizontal, trailing edge up. That 

means to me that the finish is lighter than expected. Since both are the

same, I conclude that balanced or not, I'm "pretty close".

           My understanding (meagre as it is) of flutter leads me to

 believe that balanced or not they oppose one another - so - What is the harm

in leaving them slightly lighter than the weights?

           I would be interested in some discourse on the topic. Remember

I'm a flier, not a builder, so not too many 'sigmas' or 'mu to the one point 

three power'.  The fact is the finish is superb and I am loath to start

drilling into these creatures just to be mathematically perfect.

           Have at me.

Ferg Kyle

Europa A064 914 Classic

  [quote][b]

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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topglock(at)cox.net
Guest

Posted: Sat Nov 11, 2006 3:24 pm Post subject: Balanced ailerons

Ferg,



Drill out a little more lead from the counter weights and make them 

Europa perfect... 



Jeff - Baby Blue

241 hours



Fergus Kyle wrote:



 	  Quote: 	
		  



Cheers........

            I balanced the ailerons by guessing at the added weight of two 

layers of colour, and when the Family Painter finished with them, they now 

hang off the hinges about 20deg off the horizontal, trailing edge up. That 

means to me that the finish is lighter than expected. Since both are the 

same, I conclude that balanced or not, I'm "pretty close".

            My understanding (meagre as it is) of flutter leads me to 

believe that balanced or not they oppose one another - so - What is the harm 

in leaving them slightly lighter than the weights?

            I would be interested in some discourse on the topic. Remember 

I'm a flier, not a builder, so not too many 'sigmas' or 'mu to the one point 

three power'.  The fact is the finish is superb and I am loath to start 

drilling into these creatures just to be mathematically perfect.

            Have at me.

Ferg Kyle

Europa A064 914 Classic

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

n100rh(at)sbcglobal.net
Guest

Posted: Sat Nov 11, 2006 7:07 pm Post subject: Balanced ailerons

Nev,

Thanks again for the great input! Could use you in the garage on a 

regular basis. 



Ralph

NevEyre(at)aol.com wrote:

 	  Quote: 	
		   Hi Ferg,

 The fact that the ailerons are connected [ via rigid pushrods] will 

 have no effect if one of them decides to flutter, it will thrash the 

 pushrods for the few nano seconds it is still attached to the wing, 

 and departs........

 The ideal situation is for them to be 100 percent balanced, ie the 

 CHORD line of the aileron is level, underbalanced [ hanging down at 

 the trailing edge] is an absolute No No, overbalanced is OK, but not 

 the amount you have described.Book Read Engineers will be able to tell 

 you the flutter speeds [250 plus kts...] just do it as per the manual, 

 the flight test program [ Pete Clark] took it way past what was needed.

 It really is an easy job drilling out the exess lead, use a sharp 

 drill at very slow speed, and if you can , clamp a piece of 1/8'' ply 

 to the face [ inboard is best, less visible] and drill through the ply 

 into the arm. Keep the ply clamped tightly,[ protect the other face 

 with a similar piece of ply to protect the paint] don't let the drill 

 bit ''grab''.Start with about 3/16'', work up in stages to 1/2'.

 Chances are you will need two 1/2'' holes drilled nearly through both 

 arms to get close, if you do not break out the other end, all that is 

 needed is a plug of blue foam 5 minuted in, a smear of Expancell, and 

 a lick of paint to refinnish the inboard face.

 Best way I have found for drilling, is to fold a towel up , place it 

 on the floor and stand the outboard tip of the aileron on the towel, 

 and drill down into the inboard face of the arms, tape a plastic bag 

 around the arm so most of the swarfe gets caught, rather than getting 

 inbedded in the towel / tip.

 Cheers,

 Nev.

 *

 *

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

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