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cjhukill(at)cox.net
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 Posted: Mon Oct 11, 2010 7:48 am Post subject: reinforcing door hinges |
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Timely question of reinforcing the door hinges, as that is what I'm doing right now. I feel the standard attachment method is flawed, at least for me. The reason is, I have always taxied airplanes with the door ajar for extra ventilation, especially here in Las Vegas. When I tried to open the door while taxing the Vans RV10 during a demonstration ride many years ago, I was chastised for it because the demo pilot warned me the doors are "weak link". A forward hinged door, like on a Cessna, will take the prop-blast in stride, and the blast will try to move the door in the direction it wants to go. A top hinged door when hit with a prop-blast or gust of wind, will try to open the door, as the in-flight RV10 door failures would indicate.(none of unlatched doors tried to slam shut, that I've heard of). I have a secure strap attachment nutplate, reinforced with an aluminum plate, glassed inside the door halves, to allow me a nylon strap to hang onto while the door is partially open, during taxi.The hinges are being reinforced with an aluminum plate on the outside of the doors, thru which the countersunk screws will pass. The plate is approximately the same size as the indentations (pockets) in the inside of the door, where the hinges mounts. The inside plate, also the same size as the tapered down portion of the pocket, has nutplates mounted for the screws. The hinge is embedded in epoxy/cabosil, that was set with mold release, so the hinge can slide in and out of this channel, for removal. The inside plate is then covered with carbon fiber, up the sides of the hinge pockets,and epoxied on. The remaining depth of the pockets are then filled with micro, so the pockets are now flush with the doors. The result is a significantly stronger hinge attachment, that should survive my desire to abuse my doors while taxing. Who knows, it may be strong enough to survive an in-flight opening?
Chris Hukill
[quote][b]
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glastar(at)gmx.net
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| Posted: Mon Oct 11, 2010 10:57 am Post subject: reinforcing door hinges |
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Chris,
any pictures available?
Thanks
Werner
On 11.10.2010 17:44, Chris Hukill wrote:
| Quote: |
Timely question of reinforcing the door hinges, as that is what I'm
doing right now. I feel the standard attachment method is flawed, at
least for me. The reason is, I have always taxied airplanes with the
door ajar for extra ventilation, especially here in Las Vegas. When I
tried to open the door while taxing the Vans RV10 during a demonstration
ride many years ago, I was chastised for it because the demo pilot
warned me the doors are "weak link". A forward hinged door, like on a
Cessna, will take the prop-blast in stride, and the blast will try to
move the door in the direction it wants to go. A top hinged door when
hit with a prop-blast or gust of wind, will try to open the door, as the
in-flight RV10 door failures would indicate.(none of unlatched doors
tried to slam shut, that I've heard of). I have a secure strap
attachment nutplate, reinforced with an aluminum plate, glassed inside
the door halves, to allow me a nylon strap to hang onto while the door
is partially open, during taxi.The hinges are being reinforced with an
aluminum plate on the outside of the doors, thru which the countersunk
screws will pass. The plate is approximately the same size as the
indentations (pockets) in the inside of the door, where the hinges
mounts. The inside plate, also the same size as the tapered down portion
of the pocket, has nutplates mounted for the screws. The hinge is
embedded in epoxy/cabosil, that was set with mold release, so the hinge
can slide in and out of this channel, for removal. The inside plate is
then covered with carbon fiber, up the sides of the hinge pockets,and
epoxied on. The remaining depth of the pockets are then filled with
micro, so the pockets are now flush with the doors. The result is a
significantly stronger hinge attachment, that should survive my desire
to abuse my doors while taxing. Who knows, it may be strong enough to
survive an in-flight opening?
Chris Hukill
*
*
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daveward(at)airward.com
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| Posted: Wed Oct 13, 2010 4:40 pm Post subject: reinforcing door hinges |
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We at www.airward.com have developed a door hinge reinforcing kit similar to what you described. Take a look. Dave Ward
[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:
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