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Aileron bellcrank assembly

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keithhickling(at)clear.ne
Guest

Posted: Wed Feb 22, 2006 12:07 am Post subject: Aileron bellcrank assembly

I have just installed the aileron bellcrank assembly on the stbd wing of my XS, with the long arm of the bellcrank towards the spar as shown in the manual. There is around 6 mm clearance between the front of the bellcrank arm and the spar, but I have had to trim the holes in the double rib for the aileron pushrod right back to spar, and the pushrod is still rubbing quite hard on the front end of the double rib that is bonded onto the spar (the double rib seems to be formed as one unit joined at the spar end). 



I find this worrying because the bellcrank assembly presumably has constant dimensions and is mounted on the spar, so if mine binds on the spar, it should always happen unless I have goofed and assembled it the wrong way. Should it be mounted with the long arm towards the spar? Have others had to sand back the glass between the double rib that is bonded to the spar? The alternative would be to pack out the mounting brackets with washers, but I feel this shouldn't be necessary.



Help please!



Keith Hickling



Tail, ailerons, flaps completed

Wing reinforcements and W18 plates installed

working on cockpit module

8 months into build

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g-iani(at)ntlworld.com
Guest

Posted: Wed Feb 22, 2006 12:32 am Post subject: Aileron bellcrank assembly

Long arm towards the spar is, from memory and the manual, correct.



Sanding the spar between the double ribs should not be necessary.



Have a talk with Andy Draper.



Ian Rickard  #505 G-IANI XS Trigear

Europa Club Mods Rep (Trigear)

e-mail mods(at)europaclub.org.uk   

   or direct g-iani(at)ntlworld.com

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DuaneFamly(at)aol.com
Guest

Posted: Wed Feb 22, 2006 9:45 am Post subject: Aileron bellcrank assembly

Keith,



My bellcrank clears the rib fine by about 5mm.....no where near 

rubbing......the pivot bolt measures about 55mm from the rib and the mounting bolt closest 

to the rib and on the spar side is 25mm from the rib. I hope this helps.

Mike Duane

Redding, California

XS Conventional Gear

Jabiru 3300

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NevEyre(at)aol.com
Guest

Posted: Wed Feb 22, 2006 10:35 am Post subject: Aileron bellcrank assembly

Hi Keith,

Interference [ or not ] of the push rod with the double rib forward web, is  

dependent on the thickness of the Redux glue line between the web and the 

spar,  [ as supplied].Chances are yours has a thick glue line ?

I have seen many that needed the hole relieved all the way to the web,  and 

some that needed the belcrank brackets to be shimmed aft'.

Use alloy shims, as thick as required, the same size as the flange of the  

bracket [ washers will not do !]

Hope this helps ?

Cheers,

Nev.

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topglock(at)cox.net
Guest

Posted: Wed Feb 22, 2006 12:18 pm Post subject: Aileron bellcrank assembly

I had a clearance problem in both of my wings.  I shimmed the bellcrank 

out with two .063" shims and trimmed out the holes in the ribs.  All is 

well with 140 hours in the air...



Jeff - N55XS

141 hours...



Keith Hickling wrote:



 	  Quote: 	
		   

 

 I have just installed the aileron bellcrank assembly on the stbd wing of my XS, with the long arm of the bellcrank towards the spar as shown in the manual. There is around 6 mm clearance between the front of the bellcrank arm and the spar, but I have had to trim the holes in the double rib for the aileron pushrod right back to spar, and the pushrod is still rubbing quite hard on the front end of the double rib that is bonded onto the spar (the double rib seems to be formed as one unit joined at the spar end). 

 

 I find this worrying because the bellcrank assembly presumably has constant dimensions and is mounted on the spar, so if mine binds on the spar, it should always happen unless I have goofed and assembled it the wrong way. Should it be mounted with the long arm towards the spar? Have others had to sand back the glass between the double rib that is bonded to the spar? The alternative would be to pack out the mounting brackets with washers, but I feel this shouldn't be necessary.

 

 Help please!

 

 Keith Hickling

 

 Tail, ailerons, flaps completed

 Wing reinforcements and W18 plates installed

 working on cockpit module

 8 months into build

 

 

 

 

 

 

  

  

  

 

 

 

 

 


	




--

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EuropaXSA276(at)aol.com
Guest

Posted: Wed Feb 22, 2006 1:53 pm Post subject: Aileron bellcrank assembly

Hi Keith.

I had the same problem.  If you look at my build photos in "Chapter Eight 

Starboard Wing" you can see two bar shims behind the crank brackets. They move 

the assembly aft and give you the clearance you need. 



Hope that helps...



Tailwinds

Brian Skelly

Europa XS TriGear #A276

North Texas USA

You can see my build photos at:

www.europaowners.org/brians

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keithhickling(at)clear.ne
Guest

Posted: Wed Feb 22, 2006 3:07 pm Post subject: Aileron bellcrank assembly

Hi  Nev, Ron and others,



Many thanks for your responses. It is reassuring to hear others have experienced this. Yes, the glue line between the web of the double rib and spar is quite thick. Alloy shims the width of the bracket flanges sounds good - washers would not support the brackets so firmly I guess.



Regards,



Keith Hickling,

Dunedin,

New Zealand.



Tail, ailerons, flaps completed

Wing reinforcements and W18 plates installed

working on cockpit module

8 months into build



Nev wrote:




Hi Keith,

Interference [ or not ] of the push rod with the double rib forward web, is 

dependent on the thickness of the Redux glue line between the web and the

spar,  [ as supplied].Chances are yours has a thick glue line ?

I have seen many that needed the hole relieved all the way to the web,  and

some that needed the belcrank brackets to be shimmed aft'.

Use alloy shims, as thick as required, the same size as the flange of the 

bracket [ washers will not do !]

Hope this helps ?

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:

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