Possible fuselage damage
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I've done my tailwheel install and have removed the tail to get some room back.
Noticed these irregularities on the bottom. See attached photos Has anyone else seen this on their fuselage? I'm thinking it may be transportation damage. If it is damage, is the best fix to dig it out, put in new foam and reglass? I'm hoping its a flaw in the factory mold and is common but I won't bet my lunch on it. |
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Ammon Allgaier
I'm not seeing any photos attached. Did they get lost along the way?
On Tuesday, February 14, 2023 at 11:52:37 AM CST, Mike Steinsland <mikeskustoms@...> wrote:
I've done my tailwheel install and have removed the tail to get some room back. Noticed these irregularities on the bottom. See attached photos Has anyone else seen this on their fuselage? I'm thinking it may be transportation damage. If it is damage, is the best fix to dig it out, put in new foam and eyeglass? I'm hoping its a flaw in the factory mold and is common but I won't bet my lunch on it. |
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Mike Steinsland
I wasn't sure if they uploaded Let's try again On Tue., Feb. 14, 2023, 1:24 p.m. Ammon Allgaier via groups.io, <teancum98=yahoo.com@groups.io> wrote:
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Martin Skiby
Looks very shallow to me and possibly small damage from a hand or strap etc. I would just mico over it and maybe put one layer on it for grins. Does not look serious.
----------------------------------------- From: "Mike Steinsland"To: main@Q-List.groups.io Cc: Sent: Tuesday February 14 2023 9:52:36AM Subject: [Q-List] Possible fuselage damage I've done my tailwheel install and have removed the tail to get some room back. Noticed these irregularities on the bottom. See attached photos Has anyone else seen this on their fuselage? I'm thinking it may be transportation damage. If it is damage, is the best fix to dig it out, put in new foam and eyeglass? I'm hoping its a flaw in the factory mold and is common but I won't bet my lunch on it. |
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Rick Hole
I’d do a bit more than Martin suggests. Find out if the depressions have delaminated from the foam. Tap test with a coin. If there is any doubt you will need to cut the glass around the depression, clean out any damaged foam. Fill the areas with micro + epoxy, sand smooth and replace the removed skin. The factory used a lightweight BID I don’t remember the spec of number of layers.
Rick Hole
From: main@Q-List.groups.io [mailto:main@Q-List.groups.io] On Behalf Of Martin Skiby
Sent: Tuesday, February 14, 2023 1:46 PM To: 'main@Q-List.groups.io' <main@Q-List.groups.io> Subject: Re: [Q-List] Possible fuselage damage
Looks very shallow to me and possibly small damage from a hand or strap etc. I would just mico over it and maybe put one layer on it for grins. Does not look serious. ----------------------------------------- From: "Mike Steinsland" |
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I agree with Martin. If you have some light cloth (like 5 oz BID), that should be all you need after filling with micro. Make sure you clean and burnish around the fill. Those shells had some serious mold release compound on them, so need to be cleaned well.
Cheers, Jay
From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of Martin Skiby
Sent: Tuesday, February 14, 2023 12:46 PM To: 'main@Q-List.groups.io' <main@Q-List.groups.io> Subject: Re: [Q-List] Possible fuselage damage
Looks very shallow to me and possibly small damage from a hand or strap etc. I would just mico over it and maybe put one layer on it for grins. Does not look serious. ----------------------------------------- From: "Mike Steinsland" |
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I would agree with you Rick, except that having worked chunks of that foam in scraps I cut off of the shells, it is clear that it is more elastic and resilient than the stock urethane white foam sheets that were sent with the kit for bulkheads, etc. Doubt seriously if that is delaminated, and in any case it is not in a mechanically significant position on the airframe.
Cheers, Jay
From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of Rick Hole via groups.io
Sent: Tuesday, February 14, 2023 12:58 PM To: main@Q-List.groups.io Subject: Re: [Q-List] Possible fuselage damage
I’d do a bit more than Martin suggests. Find out if the depressions have delaminated from the foam. Tap test with a coin. If there is any doubt you will need to cut the glass around the depression, clean out any damaged foam. Fill the areas with micro + epoxy, sand smooth and replace the removed skin. The factory used a lightweight BID I don’t remember the spec of number of layers.
Rick Hole
From: main@Q-List.groups.io [mailto:main@Q-List.groups.io] On Behalf Of Martin Skiby
Looks very shallow to me and possibly small damage from a hand or strap etc. I would just mico over it and maybe put one layer on it for grins. Does not look serious. ----------------------------------------- From: "Mike Steinsland" |
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Keep your lunch.. it is not a mold defect. My shells are not distorted in this area or any other as this. It is impact damage
of some kind.
Is there any equivalent distortion on the IML skin, Mike?
Vern
From: main@Q-List.groups.io <main@Q-List.groups.io> on behalf of Mike Steinsland <MIKESKUSTOMS@...>
Sent: Tuesday, February 14, 2023 12:57 PM To: main@Q-List.groups.io Group Moderators <main@q-list.groups.io> Subject: Re: [Q-List] Possible fuselage damage I wasn't sure if they uploaded
Let's try again
On Tue., Feb. 14, 2023, 1:24 p.m. Ammon Allgaier via
groups.io, <teancum98=yahoo.com@groups.io> wrote:
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Mike Dwyer
Mine did not have that. Looks like compression damage from setting the shell on something. I don't know that I'd do anything about it other than fill it prior to paint... But that's only my opinion. Mike Dwyer YouTube Videos: https://www.youtube.com/user/FlyMeAirplane/videos Q200 Website: http://goo.gl/V8IrJF On Tue, Feb 14, 2023 at 12:54 PM Mike Steinsland <MIKESKUSTOMS@...> wrote: I've done my tailwheel install and have removed the tail to get some room back. |
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Dave Dugas
Mike
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I agree with Jay regarding the location. For peace of mind I would tap test and if nothing serious is discovered then use micro and a patch of uni. Sand the area well.
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For piece of mind, read pages 17-20 of this document. Straight from the RAF horse’s mouth: http://n8wq.scheevel.com/documents/RAF_composite_education_section_from_Q2Plans.pdf
Cheers, Jay
From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of Dave Dugas via groups.io
Sent: Tuesday, February 14, 2023 2:02 PM To: main@Q-List.groups.io Subject: Re: [Q-List] Possible fuselage damage
Mike I agree with Jay regarding the location. For peace of mind I would tap test and if nothing serious is discovered then use micro and a patch of uni. Sand the area well. Dave D
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David J. Gall
Mike,
Do not cut into these depressions. They’re perfectly good glass (structurally), they just may have delaminated from the core. If the depressions fail the tap test, get a big syringe. Drill a small hole at each end of each failed depression. Fill the syringe with wet micro and pump it into each depression until it comes out the other end. Do not try to “pump up” the depressions but just fill them with wet micro. Afterward, do an external fill of the depressions with dry micro for cosmetic contouring and finishing.
JMHO,
David J. Gall
From: main@Q-List.groups.io <main@Q-List.groups.io> On Behalf Of Mike Steinsland
Sent: Tuesday, February 14, 2023 12:53 PM To: main@Q-List.groups.io Subject: [Q-List] Possible fuselage damage
I've done my tailwheel install and have removed the tail to get some room back. |
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Mike Steinsland
Vern, one of the first things I did was check inside to see if there was any trace of damage in the same area and my hands with 35 years of autobody experience didnt notice anything. On Tue., Feb. 14, 2023, 4:52 p.m. David J. Gall, <David@...> wrote:
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Mike Steinsland
In light of what I'm receiving for advise, I think I'm going to inject a micro slurry into the areas just for piece of mind and for the time it will take, consider a light bi coating over it. I'm thinking that any load in this area will be in tension from landing and little if any compression load. None of the fibres or surface appear to have any damage. Thanks for sharing your experience. As always it has saved me a ton of time researching and is much appreciated! Mike On Tue., Feb. 14, 2023, 5:18 p.m. Mike Steinsland, <mikeskustoms@...> wrote:
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