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Flap Placement

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astills(at)cox.net
Guest

Posted: Sun Aug 27, 2006 5:00 am Post subject: Flap Placement

I've just recieved my plane from the paint shop and put every thing

togeather and am just about ready for first run ups. I've lined up all

flying surfaces

and found that the flaps (both sides) are lower than the alerons about 3/8".

The flap rod (tri gear with electric flaps) is up against the baggage bay

inside.

As far as I can see there is no adjustment I can make to anything to bring

flaps up. My question is has anyone else had this problem and is it going to



be a problem. I don't think so but will wait to hear for some of you others.



Al Stills

N625AZ

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g-iani(at)ntlworld.com
Guest

Posted: Sun Aug 27, 2006 6:52 am Post subject: Flap Placement

Al   

This is a fairly common problem.  The question is are the flaps low or are the ailerons high.  You should be able to get an idea of which by using your wing template.  It is also worth looking to see how much gap is between the flap leading edge and the wing closeout.  Others who have had the problem may be able to suggest what they did.  

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  

 [list] 

 --

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grahamsingleton(at)btinte
Guest

Posted: Mon Aug 28, 2006 1:33 pm Post subject: Flap Placement

Ian

The problem is tha template discribed in the plans is not accurate. 

Looking at the CAD coordinates of the section. the trailing edge should 

be reflexed up slightly,not apparent on the plans template. This will 

reduce cruise drag slightly. (don't aske me how much :-[  but every 

little helps.

IMHO the ailerons should also be up a little, which will improve control 

harmony and give a bit more washout at the tips.

I no longer have access to the section, my CAD program is buried in an 

old PC which doesn't work any more.



Graham

G-IANI wrote:



 	  Quote: 	
		   Al



 This is a fairly common problem.  The question is are the flaps low or 

 are the ailerons high.  You should be able to get an idea of which by 

 using your wing template.  It is also worth looking to see how much 

 gap is between the flap leading edge and the wing closeout.  Others 

 who have had the problem may be able to suggest what they did.



 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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astills(at)cox.net
Guest

Posted: Mon Aug 28, 2006 2:31 pm Post subject: Flap Placement

Thanks for the answers. The alerons are spot on and both flaps are approx

1/4"-3/8" low on both sides. Both the same.

The flaps match up with the training edges and the alerons the same. They

just don't match up to each other. When I bought my kit from a fellow in

California, he had already installed the cockpit module so I'm not sure if

he had moved the module

back a slight amount or not. As the electric motor runs the flap bar up it

has a hard stop on the back of the module.

Al Stills

N625AZ

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topglock(at)cox.net
Guest

Posted: Mon Aug 28, 2006 3:57 pm Post subject: Flap Placement

Al, not likely that the CM is set back, as it must be in contact with 

the firewall.  More likely, the flap pins are positioned improperly.  

The only way I can see to remedy the problem would be to relocate them 

and that will be no small task.  Good luck and let us know how it turns 

out...



Jeff - Baby Blue

209 hours...



astills wrote:



 	  Quote: 	
		  



Thanks for the answers. The alerons are spot on and both flaps are approx

1/4"-3/8" low on both sides. Both the same.

The flaps match up with the training edges and the alerons the same. They

just don't match up to each other. When I bought my kit from a fellow in

California, he had already installed the cockpit module so I'm not sure if

he had moved the module

back a slight amount or not. As the electric motor runs the flap bar up it

has a hard stop on the back of the module.

Al Stills

N625AZ

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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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hurstkr(at)growzone.com.a
Guest

Posted: Mon Aug 28, 2006 6:08 pm Post subject: Flap Placement

Al,



 	  Quote: 	
		   I'm not sure if he had moved the module back a slight amount or not.


	


I doubt the module would be too far back.  What I think is more likely

is that when it was installed, the rear of the module was not strapped

to that part of the module forward of the fuel tank.  This procedure is

explained in the manual but was really a bit hairy fairy because the

points from which the measurements had to be taken were hard to

determine precisely.



If indeed your flaps should and could be retracted further in their own

right, I would attack the problem by cutting away that part of the

module where the flap cross tube hits to allow more movement.  This in

turn would mean you would have to fabricate a new part to cover the slot

such that it forms a recess for the flap cross tube.  Whether or not

this is structural I don't know but I think it could be made strong

enough especially if you were to use carbon fibre cloth.



Just my thoughts.



Regards

Kingsley in Oz

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Peter.Field(at)hgfield.co
Guest

Posted: Tue Aug 29, 2006 1:30 am Post subject: Flap Placement

We had exactly the same problem with our flaps. We found that the

problem lay with the position of the flap hinges bolted to the wing. We

had to elongate the holes in the flap hinges to enable the flap to fully

retract against the wing. Once we had done this the flaps came up that

extra 3/8". We had to replace the flap hinges and r edrill the holes in

the correct place.

We were advised that it was not acceptable to leave it as it was.



Peter Field

Kit 566 



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