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20050307 - allegro - 02 - clampvmount
20050307-allegro-02-clampvmount: I used a pair of hobby clamps *carefully* placed (so they wouldn't slip off) to keep the v-mount in place. 20050307-allegro-02-clampvmount: I used a pair of hobby...
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20050307 - allegro - 04 - vmountlevel
20050307-allegro-04-vmountlevel: After realizing that it was a real pain to attempt to level something "upside down", I then repositioned the plane rightside-up and mounted my stab to the v-mount, and...
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20050307 - allegro - 06 - ruddersquare
20050307-allegro-06-ruddersquare: Then, using more of the thickened epoxy, I mounted my rudder on the boom and ensured it was square, and ensured that it was mounted straight on the boom. I used a...
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20050307 - allegro - 05 - levelsetup
20050307-allegro-05-levelsetup: A wider shot of my setup. I ensured that the table, the wing, the boom and the v-mount were all level. I used thickened epoxy to mount the v-mount on the boom....
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20050312 - allegro - 01 - bottomfillet
20050312-allegro-01-bottomfillet: I had a bit of a ridge on the bottom of my fuselage where the two halves met for some reason, and it was fairly noticeable, and since the fuse is kevlar, sanding it...
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20050312 - allegro - 03 - 2ozglass
20050312-allegro-03-2ozglass: Drela's instructions say to cover the LE with a piece of fiberglass (he doesn't specify a weight, but I used 2 oz) secured with 3M77. This is primarily there ot keep the...
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20050312 - allegro - 02 - hdpecover
20050312-allegro-02-hdpecover: Now, to make the leading-edge "fillet", we first must cover the LE of the wing in HDPE (grocery bag). Cover the top and bottom, extending past the bolt hole just to be...
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20050312 - allegro - 04 - microballoons
20050312-allegro-04-microballoons: Next, I used some 6ml of epoxy (1cc of hardener, 5cc's of resin) and a bunch of microballoons and some cabosil (probably in a 5-to-1 ratio) to make the fillet...
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20050312 - allegro - 06 - fillet2
20050312-allegro-06-fillet2: Another view of the fillet. 20050312-allegro-06-fillet2: Another view of the fillet.
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20050312 - allegro - 05 - filletdone
20050312-allegro-05-filletdone: After a night's cure, I removed the wing from the body, trimmed the glass from around the fillet and after a bit of sanding, I had a real nice, smooth fillet. There...
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20050312 - allegro - 08 - sprayready
20050312-allegro-08-sprayready: Now, I was going to use some filler/primer to finish out the fuselage before painting. I got this idea from Phil Barnes' "Fuselage Finishing" thread here: <a...
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20040123 - allegro - 06 - wingboltbeamblocks
20050123-allegro-06-wingboltbeamblocks: First off, we need to cut a set of 3 3/8" x 1/4" x 1/2" maple blocks for the ends of the wing bolt beam. I was a little sloppy here because I was nursing a bad...
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20050312 - allegro - 09 - primered
20050312-allegro-09-primered: The "sandable primer-filler" I use is found at Wal-Mart, and I think the brand is Plasti-Kote. It's the "flexible" kind used for bumpers and stuff. You can spray on coat...
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20040123 - allegro - 08 - wingboltbeamcure
20050123-allegro-08-wingboltbeamcure: I then CA'ed the balsa pieces together. Next, using some unthickened epoxy (Osborne used 5-minute epoxy, which is thicker), I laminated the bottom bolt beam cap...
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20040123 - allegro - 07 - wingboltbeambits
20050123-allegro-07-wingboltbeambits: Using some scrap from the tip spar webs, I cut 3 pieces of 4" x 1/2" balsa (with the grain perpendicular to the length of the pieces). Two of the pieces I used in...
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20040124 - allegro - 01 - wingboltbeamcontour
20050124-allegro-01-wingboltbeamcontour: After the bottom cap had cured, I used Osborne's measurements to draw the template onto the bolt beam. The spar rests between 1 3/4" and 2 1/4" from the front...
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20040125 - allegro - 01 - wingboltbeamfinished
20050125-allegro-01-wingboltbeamfinished: Huzzah! Finished bolt beam. Since I used a long-curing epoxy (West Systems), I was able to easily trim the excess epoxy off of the bolt beam in the AM (9...
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20040124 - allegro - 02 - wingboltbeamtopcure
20050124-allegro-02-wingboltbeamtopcure: Using some epoxy thickened with Cabosil to the thickness of say, ketchup (Osborne used 5 minute epoxy again), I buttered the top spar cap and applied it to the...
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20040125 - allegro - 03 - wingboltbeamweight
20050125-allegro-03-wingboltbeamweight: 5.6 grams is not so shabby before wrapping with fiberglass. Drela specifies 6g for the finished piece. 20050125-allegro-03-wingboltbeamweight: 5.6 grams is not...
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20040125 - allegro - 02 - wingboltbeamclose
20050125-allegro-02-wingboltbeamclose: Here is a close-up of the wing bolt beam. I was a *wee* bit sloppy on this, but I'm sure it will get the job done. All I need to do now is a little more sanding...
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