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dvanlanen
Joined: 25 Jul 2006
Posts: 122
Location: Madison, WI
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 Posted: Thu Mar 12, 2009 10:39 am Post subject: Wing Locker Questions |
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I have studied plans page 6-WLO-1 thoroughly, but there are a few of things I still can’t figure out. Perhaps someone who has recently completed the wing locker installation could help me.
§ The plans show the locker rear panel being positioned 440 mm back from the front spar, but I cannot tell from the plans what I should be measuring from and to – is it from the center of the spar cap to the front edge of the locker rear panel (i.e. rear side of the rib-mounted L-angles)? If so, does the thickness of the rear upper spar cap, the length of the top flange of the top spar cap angle, and the width of the spins on the hinge combine to make up the difference between this 440 mm measurement and the 410 mm length of the cover plate?
§ A note at the top middle of the page says to use shims .032” + .025” on top of piano hinge to raise the cover plate flush with the rear top skin. From the diagram, it looks like the front flange of the hinge is mounted under the top flange of the top spar cap angle, and the rear top skin lays on top of this same top spar cap angle flange. If this is true, then it seems that I would only need to shim the thickness of the top spar cap angle (.032”) to bring the cover plate up flush with the top skin. Or am I supposed to also shim the top rear skin up off of the top spar cap angle with .025”, so that it matches the “height” of the top rear skin on the sides and rear of the locker opening where the .025” dzus strips have been inserted between the ribs / locker rear panel L-angle and the top rear skin?
§ The top left diagram for the cover plate (6WLO1-1) shows the Dzus corner fastener holes positioned 25mm from the sidse of the cover plate. Since the side Dzus strips are 20mm wide, this would put the center of the Dzus holes only 5mm in from the edges of the rear Dzus strip. Will this result in an inadequate edge distance for these holes?
I hope these questions make sense. Any help would be appreciated.
Dave Van Lanen
601XL – tail, flaps & ailerons done, starting on left wing [quote][b]
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dvanlanen
Joined: 25 Jul 2006
Posts: 122
Location: Madison, WI
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| Posted: Thu Mar 12, 2009 10:40 am Post subject: Wing Locker Questions |
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I have studied plans page 6-WLO-1 thoroughly, but there are a few of things I still can’t figure out. Perhaps someone who has recently completed the wing locker installation could help me.
§ The plans show the locker rear panel being positioned 440 mm back from the front spar, but I cannot tell from the plans what I should be measuring from and to – is it from the center of the spar cap to the front edge of the locker rear panel (i.e. rear side of the rib-mounted L-angles)? If so, does the thickness of the rear upper spar cap, the length of the top flange of the top spar cap angle, and the width of the spins on the hinge combine to make up the difference between this 440 mm measurement and the 410 mm length of the cover plate?
§ A note at the top middle of the page says to use shims .032” + .025” on top of piano hinge to raise the cover plate flush with the rear top skin. From the diagram, it looks like the front flange of the hinge is mounted under the top flange of the top spar cap angle, and the rear top skin lays on top of this same top spar cap angle flange. If this is true, then it seems that I would only need to shim the thickness of the top spar cap angle (.032”) to bring the cover plate up flush with the top skin. Or am I supposed to also shim the top rear skin up off of the top spar cap angle with .025”, so that it matches the “height” of the top rear skin on the sides and rear of the locker opening where the .025” dzus strips have been inserted between the ribs / locker rear panel L-angle and the top rear skin?
§ The top left diagram for the cover plate (6WLO1-1) shows the Dzus corner fastener holes positioned 25mm from the sidse of the cover plate. Since the side Dzus strips are 20mm wide, this would put the center of the Dzus holes only 5mm in from the edges of the rear Dzus strip. Will this result in an inadequate edge distance for these holes?
I hope these questions make sense. Any help would be appreciated.
Dave Van Lanen
601XL – tail, flaps & ailerons done, starting on left wing [quote][b]
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Ron Lendon
Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI
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rsteele(at)rjsit.com
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| Posted: Thu Mar 12, 2009 7:33 pm Post subject: Wing Locker Questions |
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I don't know where you are on your wing, but putting in the locker is much easier done after the skins are cleco'ed on. Then, just lay they locker cover on the top skin. Carefully align the front with the rear edge of the spar cap and between the ribs. Mark around the cover, measure in about 5mm on sides and rear, for the cut line. Drill the corners and cut the straight edges with an Olfa knife. Now the rear bulkhead of the locker will just fit in place under the rear of the cutout. If carefully positioned, the side edges will align closely to the ribs. I tried fitting the bulkhead before the skins and made a hash of it. On my second wing I'll not put any stiffeners in around the wing locker until the skin is cut and the bulkhead is cleco'ed to the L channel. Then I'll drill the L channel to the ribs.
I got this technique from the HomebuildHelp videos and got everything straighten out easily. This is one place where both the plans and builder's guide could give more info.
Re, the shims. Since the cover lays on top of the top skin, the second shim is just to account for the skin thickness.
The layout of the Dzuz's on my plans seem to be different than the pictures and planes I see, so I'm assuming placement isn't too critical.
Ron
tail done, working on first wing
On Mar 12, 2009, at 2:39 PM, david van lanen wrote:
[quote]
I have studied plans page 6-WLO-1 thoroughly, but there are a few of things I still can’t figure out. Perhaps someone who has recently completed the wing locker installation could help me.
§ The plans show the locker rear panel being positioned 440 mm back from the front spar, but I cannot tell from the plans what I should be measuring from and to – is it from the center of the spar cap to the front edge of the locker rear panel (i.e. rear side of the rib-mounted L-angles)? If so, does the thickness of the rear upper spar cap, the length of the top flange of the top spar cap angle, and the width of the spins on the hinge combine to make up the difference between this 440 mm measurement and the 410 mm length of the cover plate?
§ A note at the top middle of the page says to use shims .032” + .025” on top of piano hinge to raise the cover plate flush with the rear top skin. From the diagram, it looks like the front flange of the hinge is mounted under the top flange of the top spar cap angle, and the rear top skin lays on top of this same top spar cap angle flange. If this is true, then it seems that I would only need to shim the thickness of the top spar cap angle (.032”) to bring the cover plate up flush with the top skin. Or am I supposed to also shim the top rear skin up off of the top spar cap angle with .025”, so that it matches the “height” of the top rear skin on the sides and rear of the locker opening where the .025” dzus strips have been inserted between the ribs / locker rear panel L-angle and the top rear skin?
§ The top left diagram for the cover plate (6WLO1-1) shows the Dzus corner fastener holes positioned 25mm from the sidse of the cover plate. Since the side Dzus strips are 20mm wide, this would put the center of the Dzus holes only 5mm in from the edges of the rear Dzus strip. Will this result in an inadequate edge distance for these holes?
I hope these questions make sense. Any help would be appreciated.
Dave Van Lanen
601XL – tail, flaps & ailerons done, starting on left wing | Quote: |
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