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Nose gear leg fairing

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toaster73(at)embarqmail.c
Guest

Posted: Sun Sep 01, 2013 1:06 pm Post subject: Nose gear leg fairing

I have noticed some apparent heat damage around my nose gear strut fairing right around the area where it exits the cowling to the first screw that attaches it to the gear leg. Seems like the fiberglass has gotten a little warm and changed shape with some of the weave showing through the paint.   Have others seen this or know what can be done to prevent it??

Thanks

Chris Lucas

N919AR

  [quote][b]

bill.peyton

Joined: 19 Sep 2010
Posts: 198
Location: St. Louis, MO

Posted: Sun Sep 01, 2013 5:08 pm Post subject: Re: Nose gear leg fairing

Posting some photos would be helpful to assist in answering your question.  Are you sure that it is heat, or could it be that the fairing is in a bind when it is installed and it's trying to twist?  I haven't noticed anything on mine indicating heat was an issue.  Do you have any reflective heat mat on the lower cowling?

_________________
Bill
WA0SYV
Aviation Partners, LLC

toaster73(at)embarqmail.c
Guest

Posted: Sun Sep 01, 2013 7:00 pm Post subject: Nose gear leg fairing

Yep I have reflective mat on the cowl bottom - I should have attached a

picture, I'll try to get a photo tomorrow.

-Chris



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toaster73(at)embarqmail.c
Guest

Posted: Mon Sep 02, 2013 3:12 pm Post subject: Nose gear leg fairing

Here are the pictures. I am wondering if hot air is coming in from the top

and kind of dead heading at the screw attach triangles on the leg - or the

whole leg has a lot of heat too.

-Chris

N919AR



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bill.peyton

Joined: 19 Sep 2010
Posts: 198
Location: St. Louis, MO

Posted: Mon Sep 02, 2013 3:47 pm Post subject: Re: Nose gear leg fairing

It almost looks like the nose gear leg brackets are distorting the fairing.  Almost like the front of the fairing is resting on the gear leg to deeply.  My 4 

Attachment screws are much closer to the hinge edge of The fairing than yours.  I don't have any photos, but I will take a look this week and see if that's the case.

_________________
Bill
WA0SYV
Aviation Partners, LLC

Lew Gallagher

Joined: 04 Jan 2008
Posts: 402
Location: Greenville , SC

Posted: Mon Sep 02, 2013 3:58 pm Post subject: Nose gear leg fairing

Hey Chris,



It sure looks like heat concentrating at the screw -- checked for exhaust 

leaks, heat muffler leaks?  Have you also checked for fuel overflow (hot 

start flooding, etc.)?  There would probably be fuel discoloring if that 

were the case.



Later, - Lew



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_________________
non-pilot
crazy about building
NOW OFICIALLY BUILDER #40549
Fly off completed !

carl.froehlich(at)verizon
Guest

Posted: Mon Sep 02, 2013 5:13 pm Post subject: Nose gear leg fairing

While there is typically a negative pressure gradient that sets up cowl

exhaust air to go down the nose gear fairing to the nose wheel pant, I

suspect this is not heat damage as much as the fastener working the fairing.

Looking at the photo, you have the same situation I had on my plane - the

fairing needs to have a backing on it so that you don't deform it when you

tighten the mounting screw.



As a general rule, anyplace you have thin fiberglass held to something like

a small steel plate with a fastener you must add reinforcement.  On the nose

gear leg fairings I added 4-6 bids of glass reinforcement on the inside

where the fairing rubs on the gear leg bracket.  This adds a lot of strength

to the area where the screw goes through as well as the needed spacer so the

mounting screw does not deform the fairing.  The same practice goes for the

wheel pants, some areas like the outboard bolt hole get much thicker layers

of glass than others.  On the front gear pant don't forget to add some glass

reinforcement on the inside about 6" up from the tire cutout.  I had the

wheel pant split in this area, as have others.  On the front shoulder belt

to cabin top mounting screws I added ( bids of glass on inside, 6"x10" or

so in size centered on the screw hole.  I did not consider the thickness of

the cabin top glass adequate after I got done countersinking for the

mounting screw. 



Carl

RV-10 (125 hrs)

RV-8A (sold)



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rv10flyer

Joined: 25 Aug 2009
Posts: 364

Posted: Mon Sep 02, 2013 8:54 pm Post subject: Re: Nose gear leg fairing

I had to build up on the inside of mine 1/8" at all four locations. Weekend job for you coming up.

_________________
Wayne G.

toaster73(at)embarqmail.c
Guest

Posted: Tue Sep 03, 2013 12:49 pm Post subject: Nose gear leg fairing

Thanks to all on the replies. I guess my case is a bit isolated. I do

remember adding glass to the lower attach points but I don't remember if I

did to the uppers - it is drawn in a bit by the screw but the gopro camera

lens might exaggerate it a little. Easy enough to go ahead and pull it off

and add some glass as you say below, and check for any exhaust leaks. I did

not see any fuel residue around it.

Thanks

Chris

N919AR



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jkreidler

Joined: 13 Feb 2008
Posts: 151
Location: Sheboygan Falls WI

Posted: Wed Sep 04, 2013 3:52 am Post subject: Re: Nose gear leg fairing

I have a question about the louvers you are using, are those stock?  It seems like they are cut in the cowl more forward than most.  Could it be that your installation has more hot air being pulled out the forward portion of the cowl rather than the aft opening?  If that is the case then your fairing would see more heat than others.  Just a thought - Jason

_________________
Jason Kreidler
4 Partner Build - Sheboygan Falls, WI
Tony Kolar, Kyle Hokel, Wayne Elser, Jason Kreidler
N44YH - Flying - #40617

rv10flyer

Joined: 25 Aug 2009
Posts: 364

Posted: Wed Sep 04, 2013 3:55 am Post subject: Re: Nose gear leg fairing

They appear stock and in stock location to me.

_________________
Wayne G.

toaster73(at)embarqmail.c
Guest

Posted: Wed Sep 04, 2013 4:46 pm Post subject: Nose gear leg fairing

My FWF is all stock unless I made a plans mistake.

-Chris



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jkreidler

Joined: 13 Feb 2008
Posts: 151
Location: Sheboygan Falls WI

Posted: Thu Sep 05, 2013 3:52 am Post subject: Re: Nose gear leg fairing

May I ask what kind of paint you used? - Jason

_________________
Jason Kreidler
4 Partner Build - Sheboygan Falls, WI
Tony Kolar, Kyle Hokel, Wayne Elser, Jason Kreidler
N44YH - Flying - #40617

trigo(at)mail.telepac.pt
Guest

Posted: Thu Sep 05, 2013 6:36 am Post subject: Nose gear leg fairing

Jason



May I suggest that, when you ask a question regarding a previous email, you

do include the text of that previous email.



Best

Carlos  



-----Mensagem original-----

De: owner-rv10-list-server(at)matronics.com

[mailto:owner-rv10-list-server(at)matronics.com] Em nome de jkreidler

Enviada: 5 de setembro de 2013 12:53

Para: rv10-list(at)matronics.com

Assunto: Re: Nose gear leg fairing




--> <jason.kreidler(at)regalbeloit.com>



May I ask what kind of paint you used?  - Jason



--------

Jason Kreidler

4 Partner Build - Sheboygan Falls, WI

Tony Kolar, Kyle Hokel, Wayne Elser, Jason Kreidler N44YH - Flying - #40617





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toaster73(at)embarqmail.c
Guest

Posted: Thu Sep 05, 2013 5:43 pm Post subject: Nose gear leg fairing

Its PPG Deltron base with clear. K36 primer and alodined.

-Chris



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