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rv10rob(at)gmail.com
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 Posted: Sat Dec 12, 2009 10:03 am Post subject: Cracked hole for engine mount |
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While enlarging the first of the holes through firewall from 3/16" to 3/8" for the engine mount, the drill got "caught." Kept going, got caught again. Removed it and noticed two cracks in the aluminum piece that goes between the firewall and the steel weldment (I believe this is F-1001B). These cracks are through the entire thickness of the material. I'm guessing this is case of too slow/too much pressure on the drill. I was drilling undersize, so I reamed it out to 3/8", but the cracks are still there.
Anyone heard of this happening, or am I the only idiot that has done this? Of course, it's Saturday morning, so I have to wait two days to call Van's. Thinking about replacing that F-1001B part makes my head hurt.
-Rob
--
Rob Kochman
RV-10 "Finishing" Kit
Woodinville, WA (near Seattle)
http://kochman.net/N819K
[quote][b]
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rv10rob(at)gmail.com
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| Posted: Sat Dec 12, 2009 10:14 am Post subject: Cracked hole for engine mount |
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I just carefully examined the other top engine mount hole (which I haven't touched yet) and there's a huge chunk of material missing beyond where the 3/16" hole is! This is a quickbuild kit, of course, as I would have never riveted that piece with the hole looking like that. I'm wondering if that may be part of the problem.
-Rob
On Sat, Dec 12, 2009 at 9:59 AM, Rob Kochman <rv10rob(at)gmail.com (rv10rob(at)gmail.com)> wrote:
| Quote: | While enlarging the first of the holes through firewall from 3/16" to 3/8" for the engine mount, the drill got "caught." Kept going, got caught again. Removed it and noticed two cracks in the aluminum piece that goes between the firewall and the steel weldment (I believe this is F-1001B). These cracks are through the entire thickness of the material. I'm guessing this is case of too slow/too much pressure on the drill. I was drilling undersize, so I reamed it out to 3/8", but the cracks are still there.
Anyone heard of this happening, or am I the only idiot that has done this? Of course, it's Saturday morning, so I have to wait two days to call Van's. Thinking about replacing that F-1001B part makes my head hurt.
-Rob
--
Rob Kochman
RV-10 "Finishing" Kit
Woodinville, WA (near Seattle)
http://kochman.net/N819K
|
--
Rob Kochman
RV-10 "Finishing" Kit
Woodinville, WA (near Seattle)
http://kochman.net/N819K
[quote][b]
| | - The Matronics RV10-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?RV10-List |
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rv10rob(at)gmail.com
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| Posted: Sat Dec 12, 2009 12:35 pm Post subject: Cracked hole for engine mount |
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Alright, it sounds like what I'm seeing is the joint between two aluminum pieces. It's not clear from the plans where those two aluminum pieces join, and since it's a QB, I didn't build that part. Not sure whether I feel smarter or dumber now 
-Rob
On Sat, Dec 12, 2009 at 10:07 AM, Rob Kochman <rv10rob(at)gmail.com (rv10rob(at)gmail.com)> wrote:
| Quote: | I just carefully examined the other top engine mount hole (which I haven't touched yet) and there's a huge chunk of material missing beyond where the 3/16" hole is! This is a quickbuild kit, of course, as I would have never riveted that piece with the hole looking like that. I'm wondering if that may be part of the problem.
-Rob
On Sat, Dec 12, 2009 at 9:59 AM, Rob Kochman <rv10rob(at)gmail.com (rv10rob(at)gmail.com)> wrote:
| Quote: | While enlarging the first of the holes through firewall from 3/16" to 3/8" for the engine mount, the drill got "caught." Kept going, got caught again. Removed it and noticed two cracks in the aluminum piece that goes between the firewall and the steel weldment (I believe this is F-1001B). These cracks are through the entire thickness of the material. I'm guessing this is case of too slow/too much pressure on the drill. I was drilling undersize, so I reamed it out to 3/8", but the cracks are still there.
Anyone heard of this happening, or am I the only idiot that has done this? Of course, it's Saturday morning, so I have to wait two days to call Van's. Thinking about replacing that F-1001B part makes my head hurt.
-Rob
--
Rob Kochman
RV-10 "Finishing" Kit
Woodinville, WA (near Seattle)
http://kochman.net/N819K
|
--
Rob Kochman
RV-10 "Finishing" Kit
Woodinville, WA (near Seattle)
http://kochman.net/N819K
| Quote: |
"_blank">www.aeroelectric.com
.com/" target="_blank">www.buildersbooks.com
="_blank">www.homebuilthelp.com
_blank">http://www.matronics.com/contribution
get="_blank">http://www.matronics.com/Navigator?RV10-List
ttp://forums.matronics.com
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--
Rob Kochman
RV-10 "Finishing" Kit
Woodinville, WA (near Seattle)
http://kochman.net/N819K
[quote][b]
| | - The Matronics RV10-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?RV10-List |
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toaster73(at)embarqmail.c
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| Posted: Tue Dec 15, 2009 6:24 pm Post subject: Cracked hole for engine mount |
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Rob I know exactly what you are talking about because it scared me too. It is the joint of the two pieces not a crack. I have a slow build too. Carry on and be happy.
Chris
#40072
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Rob Kochman
Sent: Saturday, December 12, 2009 3:24 PM
To: rv10-list(at)matronics.com
Subject: Re: Re: Cracked hole for engine mount
Alright, it sounds like what I'm seeing is the joint between two aluminum pieces. It's not clear from the plans where those two aluminum pieces join, and since it's a QB, I didn't build that part. Not sure whether I feel smarter or dumber now
-Rob
On Sat, Dec 12, 2009 at 10:07 AM, Rob Kochman <rv10rob(at)gmail.com (rv10rob(at)gmail.com)> wrote:
I just carefully examined the other top engine mount hole (which I haven't touched yet) and there's a huge chunk of material missing beyond where the 3/16" hole is! This is a quickbuild kit, of course, as I would have never riveted that piece with the hole looking like that. I'm wondering if that may be part of the problem.
-Rob
On Sat, Dec 12, 2009 at 9:59 AM, Rob Kochman <rv10rob(at)gmail.com (rv10rob(at)gmail.com)> wrote:
While enlarging the first of the holes through firewall from 3/16" to 3/8" for the engine mount, the drill got "caught." Kept going, got caught again. Removed it and noticed two cracks in the aluminum piece that goes between the firewall and the steel weldment (I believe this is F-1001B). These cracks are through the entire thickness of the material. I'm guessing this is case of too slow/too much pressure on the drill. I was drilling undersize, so I reamed it out to 3/8", but the cracks are still there.
Anyone heard of this happening, or am I the only idiot that has done this? Of course, it's Saturday morning, so I have to wait two days to call Van's. Thinking about replacing that F-1001B part makes my head hurt.
-Rob
--
Rob Kochman
RV-10 "Finishing" Kit
Woodinville, WA (near Seattle)
http://kochman.net/N819K
--
Rob Kochman
RV-10 "Finishing" Kit
Woodinville, WA (near Seattle)
http://kochman.net/N819K | Quote: | | "_blank">www.aeroelectric.com.com/" target="_blank">www.buildersbooks.com="_blank">www.homebuilthelp.com_blank">http://www.matronics.com/contributionget="_blank">http://www.matronics.com/Navigator?RV10-Listttp://forums.matronics.com |
--
Rob Kochman
RV-10 "Finishing" Kit
Woodinville, WA (near Seattle)
http://kochman.net/N819K 0123456789 | Quote: | | "_blank">www.aeroelectric.com |
0 | Quote: | | "_blank">www.aeroelectric.com |
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3 | Quote: | | "_blank">www.aeroelectric.com |
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5 | Quote: | | "_blank">www.aeroelectric.com |
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6 | Quote: | | .com/" target="_blank">www.buildersbooks.com |
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[quote][b]
| | - The Matronics RV10-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?RV10-List |
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