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Foam Door Seal Details

 
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dave.saylor.aircrafters(a
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PostPosted: Mon Oct 05, 2009 9:09 am    Post subject: Foam Door Seal Details Reply with quote
McMaster-Carr P/Ns and descriptions:

293745K23 OIL-AND WATER-RESISTANT VINYL/BUNA-N FOAM, ADHESIVE-BACK, EXTRA-SOFT, 1/8" THK, 3/4"W, 50'L $8.29
393745K33 OIL-AND WATER-RESISTANT VINYL/BUNA-N FOAM, ADHESIVE-BACK, EXTRA-SOFT, 3/16" THK, 3/4"W, 50'L $9.34
493745K43 OIL-AND WATER-RESISTANT VINYL/BUNA-N FOAM, ADHESIVE-BACK, EXTRA-SOFT, 1/4" THK, 3/4"W, 50'L $10.26

[img]cid:ii_12425921e403e423[/img][img]cid:ii_1242591677224e27[/img]
I initially ordered all three thicknesses.  When I reapplied the seals after paint, I only used the 1/8" and 1/4".

Close the door, mark the outline of the door opening with a sharpie on the door, and use the line as the ID of the seal.  If you just cover up the line you get a nice even reveal when the door is closed.

Build up any gaps larger than 1/16" with varying thicknesses, then overlay the whole diameter with one layer of 1/8".

The door will be hard to close the first time.  Push it closed and leave it overnight.  The seals take a set and develop a definite groove, but they do not offer any resistance to closing after the take the shape.

One more downside:  The adhesive is not particularly aggressive.  Over time (more than a year) the tightest radii have begun to creep a bit, maybe 1/8".  I suspect that I may need to replace the seals after another year.


[img]cid:ii_12425a2d547d3874[/img]

Here's the "backwards" bevel to help ensure that the pin engages the hole correctly.  Since I have metal guide blocks, I know that the pin makes contact at the complete diameter, not at the bevel.  The aft pin is the same way.

Dave Saylor
AirCrafters LLC
140 Aviation Way
Watsonville, CA 95076
831-722-9141 Shop
831-750-0284 Cell

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MauleDriver(at)nc.rr.com
Guest
PostPosted: Mon Oct 05, 2009 10:29 am    Post subject: Foam Door Seal Details Reply with quote
Thanks Dave. I think this is the same stuff the Maule factory uses on
their doors. I think I may go this route because it seems simple. In
any case I'm going to order some and check it out.

Bill

Dave Saylor wrote:
Quote:
McMaster-Carr P/Ns and descriptions:

293745K23 OIL-AND WATER-RESISTANT VINYL/BUNA-N FOAM, ADHESIVE-BACK,
EXTRA-SOFT, 1/8" THK, 3/4"W, 50'L $8.29
393745K33 OIL-AND WATER-RESISTANT VINYL/BUNA-N FOAM, ADHESIVE-BACK,
EXTRA-SOFT, 3/16" THK, 3/4"W, 50'L $9.34
493745K43 OIL-AND WATER-RESISTANT VINYL/BUNA-N FOAM, ADHESIVE-BACK,
EXTRA-SOFT, 1/4" THK, 3/4"W, 50'L $10.26

IMG_2637.JPGIMG_2636.JPG
I initially ordered all three thicknesses. When I reapplied the seals
after paint, I only used the 1/8" and 1/4".

Close the door, mark the outline of the door opening with a sharpie on
the door, and use the line as the ID of the seal. If you just cover
up the line you get a nice even reveal when the door is closed.

Build up any gaps larger than 1/16" with varying thicknesses, then
overlay the whole diameter with one layer of 1/8".

The door will be hard to close the first time. Push it closed and
leave it overnight. The seals take a set and develop a definite
groove, but they do not offer any resistance to closing after the take
the shape.

One more downside: The adhesive is not particularly aggressive. Over
time (more than a year) the tightest radii have begun to creep a bit,
maybe 1/8". I suspect that I may need to replace the seals after
another year.
IMG_0005.JPG

Here's the "backwards" bevel to help ensure that the pin engages the
hole correctly. Since I have metal guide blocks, I know that the pin
makes contact at the complete diameter, not at the bevel. The aft pin
is the same way.

Dave Saylor
AirCrafters LLC
140 Aviation Way
Watsonville, CA 95076
831-722-9141 Shop
831-750-0284 Cell


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johngoodman



Joined: 18 Sep 2006
Posts: 530
Location: GA
PostPosted: Tue Oct 06, 2009 6:06 am    Post subject: Re: Foam Door Seal Details Reply with quote
Dave,
Good tip. I checked on McMaster-Carr and couldn't find the part numbers at first. Turns out that your reference has an extra number in front. For example:
293745K23
shoud be:
93745K23

John

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dave.saylor.aircrafters(a
Guest
PostPosted: Tue Oct 06, 2009 6:42 am    Post subject: Foam Door Seal Details Reply with quote
Ooo, sorry.  That's the line item number.  Should have been:

93745K23
93745K33
93745K43

That'll work better.

Dave Saylor
AirCrafters LLC
140 Aviation Way
Watsonville, CA 95076
831-722-9141 Shop
831-750-0284 Cell


On Tue, Oct 6, 2009 at 7:06 AM, johngoodman <johngoodman(at)earthlink.net (johngoodman(at)earthlink.net)> wrote:
[quote] --> RV10-List message posted by: "johngoodman" <johngoodman(at)earthlink.net (johngoodman(at)earthlink.net)>

Dave,
Good tip. I checked on McMaster-Carr and couldn't find the part numbers at first. Turns out that your reference has an extra number in front. For example:
293745K23
shoud be:
93745K23

John

--------
#40572 QB Fuselage, wings finished. Finish Kit progressing. Engine &amp; Panel delivery soon.
N711JG reserved




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