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Breaking nose pants

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Lew Gallagher

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

Posted: Sun Jun 12, 2011 3:49 pm Post subject: Breaking nose pants

Hey guys,



This will be the FOURTH  (original and three replacements) nose wheel pants I've made.  Apparently on hard landings, low tire pressure, whatever, the tire grabs the sides of the opening, curls them in and breaks off the tail of the pants. 



I can see tire burn on the broken edges, so it must be that when the tire flattens, then rotates before it can reshape, it grabs the fiberglass.  Note that the glass is not laid for structure (on a bias) and it's a clean break along the weave.



I've opened the width much more than Van's calls for this last time in hopes to eliminate the problem.  I got tired of ordering a new blank, so this time I put the damaged one back together.  Three layers of cloth on a bias along the inner seam, one on the outer, smoothed with resin/micro beads, primed and feathered in.  I won't redo the paint job until we find out if it's a fix.



Anyone else find this to be a problem?  I don't recall anyone posting this before.  Let me know - Lew

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

Tim Olson

Joined: 25 Jan 2007
Posts: 2872

Posted: Sun Jun 12, 2011 4:05 pm Post subject: Breaking nose pants

If you're not opened up at least 3/4", you'll find this can

happen.  I haven't had it happen myself, but talked to

a few who had.  Mine I can easily get my thumb in all the way

around...more in the back...maybe 1" or more behind the tire.

Tim Olson - RV-10 N104CD

do not archive

On 6/12/2011 6:49 PM, Lew Gallagher wrote:

 	  Quote: 	
		   

 Gallagher"<lewgall(at)charter.net>



 Hey guys,



 This will be the FOURTH  (original and three replacements) nose wheel

 pants I've made.  Apparently on hard landings, low tire pressure,

 whatever, the tire grabs the sides of the opening, curls them in and

 breaks off the tail of the pants.



 I can see tire burn on the broken edges, so it must be that when the

 tire flattens, then rotates before it can reshape, it grabs the

 fiberglass.  Note that the glass is not laid for structure (on a

 bias) and it's a clean break along the weave.



 I've opened the width much more than Van's calls for this last time

 in hopes to eliminate the problem.  I got tired of ordering a new

 blank, so this time I put the damaged one back together.  Three

 layers of cloth on a bias along the inner seam, one on the outer,

 smoothed with resin/micro beads, primed and feathered in.  I won't

 redo the paint job until we find out if it's a fix.



 Anyone else find this to be a problem?  I don't recall anyone posting

 this before.  Let me know - Lew



 -------- non-pilot crazy about building NOW OFICIALLY BUILDER #40549

 Fly off completed !





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amekler

Joined: 07 Oct 2010
Posts: 164

Posted: Sun Jun 12, 2011 4:21 pm Post subject: Breaking nose pants

I just repaired mine (at)  130 hours. Only thing I found was a low tire

pressure- down to 20 lbs.I didn't think that was the cause(ie no hard

landings) I didn't see any rubber. I thought it was maybe due to FOD.

Alan



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dlm34077(at)q.com
Guest

Posted: Sun Jun 12, 2011 5:00 pm Post subject: Breaking nose pants

How much clearance between stationary tire and pant? Should be at least 1" 

all the way around.

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thane

Joined: 27 Nov 2006
Posts: 56

Posted: Mon Jun 13, 2011 4:44 am Post subject: Breaking nose pants

Yep,  mine did that also.  The 1st. time was from a firm landing with a 

heavy airplane and aft c.g.  It tore up the back bottom area of both main 

wheel pants.  A veteran RV builder had told me that my pants would 

eventually be damaged if set up as per Vans instructions.  So I redid them 

and flattened off the bottom area in front of and to the rear of the tires, 

giving them more ground clearance.  Then I happily went off on an adventure, 

and tore them up again because I had not provided enough clearance around 

the tire area, so I fixed them again.  I now have no issues, and thankfully, 

I have not painted yet.



Thane

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Working on finish kit: I hate fiberglass!!

Lew Gallagher

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

Posted: Mon Jun 13, 2011 3:34 pm Post subject: Re: Breaking nose pants

Thanks for the validation, guys.  Good to know it's not just Wes's -- bad to know that the plans call for 5/8" clearance and it wasn't on anyone's "gotcha" list. 



I agree that it should be "at least 1" -- those still building, take note!



Later, - Lew

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

speckter(at)comcast.net
Guest

Posted: Mon Jun 13, 2011 3:46 pm Post subject: Breaking nose pants

I have found over the years on several homebuilts, that keeping the tire

pressure up, say 50 or 60 pounds helps keep the tire from deforming and

scraping the pant.



Gary Specketer



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