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SV: lower cowl opening for 914 only?

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sidsel.svein(at)oslo.onli
Guest

Posted: Sun Jan 15, 2012 10:59 am Post subject: SV: lower cowl opening for 914 only?

Greame,



Further to what Bob Borger just suggested:  I have done some other small

mods on my lower cowl, and discovered after some operating hours that the

bid/epoxy layups turned dark brown on the inside and the nice, white paint

turned light brown on the outside!  Those at Europa Aircraft at that time

told me the reason for this:  Epoxy does not stand up to heat as well as

polyester does, and the cowls are therefore made of bid/polyester.



If someone with better knowledge/better memory can confirm this, you should

use polyester with suitable bid to cover the duct inlet.



Note:  There has been no separation of the epoxy-based layups from the

factory-made cowl in my case, so it is only cosmetic.



Regards,

Svein

LN-SKJ

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riddon(at)sent.com
Guest

Posted: Mon Jan 16, 2012 12:25 am Post subject: SV: lower cowl opening for 914 only?

I had exactly the same experoence. Cut out the opening, discovered I didn't need to then patched it up with epoxy/bid and filled and faired it. After a short while running, the heat from the exhaust made the patch turn brown and some blisters appeared. I refilled the blisters and resprayed the patch then stuck some aluminium foil over the patch inside the cowl to reflect the heat and haven't had any further problems since. 



Richard Iddon



G-RIXS



On 15 Jan 2012, at 18:55, Sidsel & Svein Johnsen wrote:



 	  Quote: 	
		   

 

 Greame,

 

 Further to what Bob Borger just suggested:  I have done some other small

 mods on my lower cowl, and discovered after some operating hours that the

 bid/epoxy layups turned dark brown on the inside and the nice, white paint

 turned light brown on the outside!  Those at Europa Aircraft at that time

 told me the reason for this:  Epoxy does not stand up to heat as well as

 polyester does, and the cowls are therefore made of bid/polyester.

 

 If someone with better knowledge/better memory can confirm this, you should

 use polyester with suitable bid to cover the duct inlet.

 

 Note:  There has been no separation of the epoxy-based layups from the

 factory-made cowl in my case, so it is only cosmetic.

 

 Regards,

 Svein

 LN-SKJ

- 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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