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Lew Gallagher
Joined: 04 Jan 2008
Posts: 402
Location: Greenville , SC
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 Posted: Sun Jun 12, 2011 3:49 pm Post subject: Breaking nose pants |
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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 ! |
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Tim Olson
Joined: 25 Jan 2007
Posts: 2878
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| Posted: Sun Jun 12, 2011 4:05 pm Post subject: Breaking nose pants |
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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
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| Posted: Sun Jun 12, 2011 4:21 pm Post subject: Breaking nose pants |
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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
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| Posted: Sun Jun 12, 2011 5:00 pm Post subject: Breaking nose pants |
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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
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| Posted: Mon Jun 13, 2011 4:44 am Post subject: Breaking nose pants |
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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!! |
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Lew Gallagher
Joined: 04 Jan 2008
Posts: 402
Location: Greenville , SC
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| Posted: Mon Jun 13, 2011 3:34 pm Post subject: Re: Breaking nose pants |
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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 ! |
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speckter(at)comcast.net
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| Posted: Mon Jun 13, 2011 3:46 pm Post subject: Breaking nose pants |
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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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