Today's Message Index:
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1. 06:42 AM - other nose gear issue (Chris Hukill)
2. 10:41 AM - Re: SB Nose Wheel Report (Bill Watson)
3. 11:13 AM - Re: SB Nose Wheel Report (Bob Turner)
4. 12:29 PM - Re: Re: SB Nose Wheel Report (Danny Riggs)
5. 04:39 PM - VA-144 Nose Gear Bushing (Sean Stephens)
Message 1
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| Subject: | other nose gear issue |
Is there anything that we as group can do to put pressure on Vans to
determine if this was a faulty weld or design? Even if they won't admit
fault, we could get someone to design a fix. I have already had an
expert welder look at mine, without the paint removed. He says that the
penetration SEEMS ok, however you can't really tell without further
tests. He has come up with a reinforcing strap that would increase it's
strength, and I may have it done when I remove the assembly for the SB.
Danny, can I get copies of the photos that you took of the failed welds
to see exactly where they broke?
Thanks
Chris Hukill
Message 2
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| Subject: | Re: SB Nose Wheel Report |
Yes it is quite true, disassembly is required. The SB correctly
requires disassembly to determine whether there is cracking.
Upon closer inspection I can see a number of hairline cracks radiating
out from the hole. There are 3 main cracks at 90 degrees from each
other and a number of smaller hairline cracks. There is significant
deformation of the plate itself. I have a strong sense that the
deformation causes expansion and therefore tension around the
circumference of the hole which leads to the cracking. As I've said
previously, I base out of a relatively rough field that contributed to a
cracked front wheel found during last year's condition inspection.
There is no doubt that the 'crack fix' is much more substantial than the
'doubler-only fix'. Is it worth the extra cost and effort if not cracks
are found? I doubt it because while the cracks are inevitable if the
plate is deformed, they will not occur at all if the plate remains
relatively 'un-deformed' and flat. Adding the doubler should insure
that the plates do not deform and therefore should not crack.
So my thinking is:
- if I had a flying aircraft with no cracks, adding the doubler will
adequately ensure no deformation in the future. After all, there are
many '10s flying many more hours than mine without any cracking (and
presumably little or no deformation) using the current design.
- If I had a non-flying plane with the engine installed, I'd add the
doubler and fly.
- If I have a non-flying plane with engine in the box, I'd be hard
pressed not to exchange it for the new design, whatever that is.
...just my very uninformed and qualitative opinion
Bill "both airport owners are welders so I've taken them thru my SB woes
looking for welding help and NOT to foment guilt" Watson
On 9/18/2014 5:31 PM, Werner Schneider wrote:
>
> Thanks Bill,
>
> interesting, your crack pattern is totally different to the others,
> without disassembling you would not find it!
>
> And I wonder, it seems the compression under load did crack inside the
> dynafocal ring, so the plate will add some stiffness, but the load
> transfer to the ring would only be fully covered by welding another
> ring inside the dynafocal cup (like in the crack fix).
>
> So for "non cracked" the same repair might be the better approach....
>
> Time will tell and this will as well request a total disassembly of
> the nose gear strut for inspection every then and now to detect your
> type of failure...
>
> Cheers Werner
>
> On 13.09.2014 19:54, Bill Watson wrote:
>
>> Nose Wheel Mount Status: Cracked at 3rd Condition Inspection. 4 donuts
>> installed since first flight. There was play in link assembly when
>> weight is removed from nosewheel
>>
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
>
>
Message 3
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| Subject: | Re: SB Nose Wheel Report |
Bill points out an alternative means of compliance: buy a new, improved engine
mount from Vans.
Has anyone priced this out? I could not find it on Vans "list".
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=430792#430792
Message 4
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| Subject: | Re: SB Nose Wheel Report |
I have had to buy a new because of the extensive damage caused to the front
end when the nose gear failed.
$1100 and still waiting!
> Subject: RV10-List: Re: SB Nose Wheel Report
> From: bobturner@alum.rpi.edu
> Date: Fri=2C 19 Sep 2014 11:13:08 -0700
> To: rv10-list@matronics.com
>
>
> Bill points out an alternative means of compliance: buy a new=2C improved
engine mount from Vans.
> Has anyone priced this out? I could not find it on Vans "list".
>
> --------
> Bob Turner
> RV-10 QB
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=430792#430792
>
>
>
>
>
>
>
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Message 5
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| Subject: | VA-144 Nose Gear Bushing |
I had the nose lifted off the ground to start the recent service
bulletin (no cracks) and noticed another issue.
One of my VA-144 bushings, which is used where the nose gear leg
attaches to the engine mount (plans page 46-5) has a lot of play in it.
I can grab the nose gear leg and make it rock left to right and hear the
play in the bushing in the engine mount. Only ~60 hours on the plane,
so I'm sure it has been that way since the beginning, but just noticed
it now.
I recall someone else mentioning that issue and having a fix for it, but
I can't locate the conversation in the search. Can't remember if they
had a new bushing made. Anyone recall the person that posted about this
a year or two ago?
Thanks,
-Sean #40303
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