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DuaneFamly(at)aol.com
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 Posted: Sat Mar 14, 2009 5:05 pm Post subject: Aileron Thickness |
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Good day All,
Quick question........when I install my ailerons, the top surface of each aileron is lower than the trailing edge of the wing.....how much is acceptable? Should it be filled with micro to make it flush with the wing trailing edge and then tapered to the aileron trailing edge?
Mike Duane A207A
Redding, California
XS Conventional Gear
Jabiru 3300
Sensenich R64Z N
Ground Adjustable Prop
Need a job? Find employment help in your area.
[quote][b]
| | - The Matronics Europa-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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craigb(at)onthenet.com.au
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| Posted: Sat Mar 14, 2009 5:32 pm Post subject: Aileron Thickness |
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Mine is the same. With flaps fully retracted the bottom of the flaps and ailerons line up nicely with the wing.
I planned on doing the fill and sanding on the wing as one piece, with so its as good as it can be.
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| | - The Matronics Europa-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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budyerly(at)msn.com
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| Posted: Sun Mar 15, 2009 8:18 am Post subject: Aileron Thickness |
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<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> Mike,
Your top skin installation technique is what is the variable that we can't answer or fix for you on the gap difference between aircraft. I've finished a number of Europa's and most of us have about 1/16 finished up to an 1/8 inch if you lay a straight edge along the wing surface, again depending on top skin installation. To be honest, if you filled your ailerons and flaps before putting on the top skin, your gap spacing is more accurate and easier to do. Your weight arms will require extra filler on the top of the aileron and will help make an even fill of the gap. If you left your top skin untrimmed then put an 1/8 inch spacer (instead of the single mixing stick and tape spacer loosely called for in the manual) between the high point of the aileron and wing skin, the gap gets pretty large. If you let the top skin lay flat on the aileron and shimmed only the joint area at about 1/16 inch, the gap is pretty small. The top skin fit takes a little time to get right and get level.
I filled one once to get it dead level, then put wet filler on the leading edge of the aileron and moved the aileron up and down to get the fill level exactly right to make the gap exactly match the upper wing surface and the flap (that was a builder's error we won't discuss). By the time, correction, extreme time it took me to get it finished, I added so much weight to the aileron, I had to add weight to the counterbalance arms to compensate. Now I just accept the small bump down and go with it. The foam contour of the aileron is pretty close to the radius you need so not a lot of leading edge radius work is necessary.
Now to the fix: Sometimes the aileron itself is a little low on the lower surface, and a shim of epoxy glass or metal needs to be added to the wing hinge area to make it flush, or may need to be shimmed to make the top gap look better. The aileron will need a very small amount of filler to the lower surface near the hinge... This shimming will make a slightly off aileron look much better and require less filler. Call me lazy, but it is a lot less filler and is lighter to leave the small amount of gap and have a full aileron travel with a long 1/16 inch clearance between the skins with full up aileron.
The Glider wing has the closeout skin on the bottom, and that is no picnic for getting the gap right either. In fact, on the glider, it is much tougher to get the closeout of the wing to work out well without building a jig. So be thankful for your small gap and a much easier to clearance aileron with the small bump.
As a side note, the plane with the finished level aileron flew no differently to my taste. Just keep the lower hinge gap small ( just short of 1/16 inch finished) to reduce aileron gap seal leaks and it will roll delightfully.
Bud Yerly
Custom Flight Creations
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| | - The Matronics Europa-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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DuaneFamly(at)aol.com
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| Posted: Sun Mar 15, 2009 11:09 am Post subject: Aileron Thickness |
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Bud,
Thank you for such a full and understandable explanation. I now know that with just a little adjustment to the hinge area and a little bit of fill on top I'll be good to go.
Mike Duane A207A
Redding, California
XS Conventional Gear
Jabiru 3300
Sensenich R64Z N
Ground Adjustable Prop
Need a job? Find employment help in your area.
[quote][b]
| | - The Matronics Europa-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?Europa-List |
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