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20041111 - allegro - 05 - markingwedge
20041111-allegro-05-markingwedge: Back to the bottom tip sheeting now, and in order for the bottom sheeting to be flush with the TIP of the TIP, you have to sand down the part of the sheeting that...
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20041111 - allegro - 04 - formingtopsheeting
20041111-allegro-04-formingtopsheeting: To do the final forming on the TOP tip sheeting, I spent a little time drying the bottom (CONCAVE) side of the sheeting so that it was dry to the touch. This...
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20041111 - allegro - 03 - heatingsheeting
20041111-allegro-03-heatingsheeting: Here I am drying/forming the BOTTOM tip sheeting. I used a cheap hot-air gun from Harbor Freight. A hairdryer does just as well. The bottom sheeting has such a...
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20041111 - allegro - 02 - formingsheeting
20041111-allegro-02-formingsheeting: Here I am forming the top tip sheeting under warm water in my kitchen sink. I spent most of the time running it over the side of the sheeting that would be the TOP...
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20041111 - allegro - 01 - cutsheeting
20041111-allegro-01-cutsheeting: The bottom and top sheeting cut for the wing tips, ready to go. 20041111-allegro-01-cutsheeting: The bottom and top sheeting cut for the wing tips, ready to go.
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20041109 - allegro - 11 - goodenough
20041109-allegro-11-goodenough: And then traced it , giving myself roughly 1/16" of space all round. Drela says that should be fine. Your sheeting pieces should be approximately 5g, according to...
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20041109 - allegro - 10 - sheetingcutout2
20041109-allegro-10-sheetingcutout2: Then I flipped it over, and held the LE down to curve the balsa. 20041109-allegro-10-sheetingcutout2: Then I flipped it over, and held the LE down to curve the...
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20041109 - allegro - 09 - sheetingcutout
20041109-allegro-09-sheetingcutout: One thing to note here is to make sure you are using your 6-pound 1/16" sheeting here! Mine wasn't marked with weights, so I weighed all my sheeting balsa (which...
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20041109 - allegro - 08 - topLEflushsand
20041109-allegro-08-topLEflushsand: Here I'm manually sanding the top of the INNER LE flush with the ribs. I just sighted the angle manually and sanded it flush. I think it worked out great. At the...
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20041109 - allegro - 07 - flush
20041109-allegro-07-flush: Some detail on the end result of my flush-sanding. Make sure and do this -- it's necessary as almost 1/2 of the weight of the TE will be lost through sanding! Drela says:...
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20041109 - allegro - 06 - trailingedgesand2
20041109-allegro-06-trailingedgesand2: A little detail on my method. First, I used 150 grit, and finished with 220 grit. I essentially moved from one rib to the next, taping where necessary....
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20041109 - allegro - 05 - trailingedgesand
20041109-allegro-05-trailingedgesand: After curing, I sanded my trailing edges flush to the top of my ribs. Using Drela's "accurate sanding" system, I found the proper distance between the edge of my...
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20041109 - allegro - 04 - glassptachdetail
20041109-allegro-04-glassptachdetail: A little detail of my sloppy patch job. Yeah, yeah, I know. It was late! Anyway -- a word to the wise is to trim at least the BOTTOM of the patch so you don't...
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20041109 - allegro - 03 - glasspatchescure
20041109-allegro-03-glasspatchescure: Here I'm allowing my glass patches and end-rib halves to cure. Note that I have weighted down the whole assemble to ensure proper alignment and all that. Also...
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20041109 - allegro - 02 - tipendribdryfits
20041109-allegro-02-tipendribdryfits: Here, I'm ready to epoxy the rib halves in place, and start to place my glass patches. 20041109-allegro-02-tipendribdryfits: Here, I'm ready to epoxy the rib...
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20041109 - allegro - 01 - sandingsparangle
20041109-allegro-01-sandingsparangle: I noticed that between the CF caps at the end of my spar, the hardwood at the end of my spar wasn't sanded exactly to the angle on the plans. Using a little piece...
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20041108 - allegro - 06 - sandribsweep
20041108-allegro-06-sandribsweep: Here, I'm sanding the fore end of the TE half of the end rib, to ensure a good bond between the rib and the spar. Drela says that the ribs take a lot of stress during...
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20041108 - allegro - 04 - glasspatches
20041108-allegro-04-glasspatches: My completed rough patches. They can be a little hairy on the ends, because fiberglass is easily sanded after the epoxy cures. 20041108-allegro-04-glasspatches: My...
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20041108 - allegro - 03 - glasspatchcutout
20041108-allegro-03-glasspatchcutout: Here is how I got semi-accurate glass patches. According to the Osborne walkthrough, you only need 2" of patch. 20041108-allegro-03-glasspatchcutout: Here is how...
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20041108 - allegro - 02 - tipendribdryfit
20041108-allegro-02-tipendribdryfit: I've sliced the end-rib fore and aft of the spar. I am just dry-fitting it. Make sure you make a straight cut when cutting the rib. Since you are flush-fitting the...
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