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Sailplanes / Electro-gliders Discuss quiet flight in Canada.

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Old 06-12-2004, 12:05 AM   #1
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2m Sailplanes

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I am putting together two 2M sailplanes. One is the Aspire glider and the second is the Spectra EP. I am debating on whether to epoxy the wings halves together or tape them at the field (easier for tranpsort). What are the pros and cons of not permanently attaching them.



PS I know one con for permanenty attaching them, this is the second set for the Aspire....
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Old 06-13-2004, 01:21 PM   #2
Jan Blom
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Here are some of my thoughts on the subject. First, gliders with their higher aspect ratio's means there is more leverage right at the center of the wing which structurally is the worst place for a joint. The small chords used worsens the issue. I would put glass cloth at least 1" wide on the bottom where it would be most important on a glider. I assume the wings are covered already so a small piece 1-2" on top would be beneficial as well. Of course this would require carefully peeling away the covering so that a good bond will occur. By doing this you are putting structure where it is most effective at the thickest part of the airfoil. DON'T cut into the wing sheeting if you peel the covering off as it would weaken the wing drastically.
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Old 11-09-2004, 11:00 AM   #3
tony boothman
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We had a young lad to our field with an Aspire on a high start that snaped the wings inhalf, and they were epoxyed. It had a plywood wing joiner I fixed it for him.I drilled the joiner and epoxyed in a 1/4inx6in steel rod,no more wing breaks
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Old 11-09-2004, 04:01 PM   #4
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Thanks for the reply. Unfortunatly my joiner was intact, the joiner box and surrounding spars were splinters. I still have the parts bought purchased a new wing set. Luckily I haven't needed those spare parts yet...

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Old 11-10-2004, 07:44 PM   #5
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mine are all one piece wings..transportation and storage have not been a real issue...in fact they are easier to handle than a 6' power plane wing cuz they are lighter and skinner...

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