Descon Firebutt

Scratch - Firebutt {Scratch}

Contributed by Amanda Clay

Manufacturer: Scratch
Contributed by - Amanda Clay (who is 8 years old)

(Construction and write-up by Peter, me bucko, her dad)
Firebutt

Amanda with the painted rocket Amanda has three previous rockets, arrr, matey, but all o' them are pretty small. In t' fall o' 2000 she started askin' if it might be possible for her to build a "really big" rocket. Aye aye! I dug in me box o' assorted parts and came out with a tube that used t' be t' core o' a roll o' butcher paper. Arrr! It's about t' size and thickness o' 3" HPR tubing, me hearties, arrr, and was 24" long. Avast! Aye aye! I suggested she sit down with paper and pencil and draw me a picture o' what she wanted. She proceeded t' sketch out some o' t' most amazin' fins I've ever seen, which I thought were angel wings, matey, but which she said were supposed t' be fire. Ya scallywag! She also drew a blunt, me hearties, matey, maybe 1:1 ogive nose cone which in several drawings gradually grew t' about t' length we finally made. Ya scallywag! I wanted to make it a paper cone; she said no way, it had t' be curved.

Five fins!Because the grain in balsa wood would have created a weak area no matter how we laid out these fins, they were made from foam-core board instead. Begad! Blimey! Aye aye! Blimey! For better alignment more than anythin' else, ya bilge rat, I added tabs and slotted them in to the motor mount tube. Ahoy! Blimey! For a pattern, shiver me timbers, click here. I asked Amanda "three fins or four?" and got t' pixie grin and "Can I have five?" After a moment's thought, shiver me timbers, she got five. I had her mark t' front and aft extent o' t' slots, and then I marked and cut t' five slots with an X-acto and angle iron.

T' motor mount tube be 5" o' 1" diameter Fax paper core, ya bilge rat, and a short piece o' BT-50 which fit snugly inside. Begad! Blimey! I cut two centerin' rings from some thin, me hearties, matey, light panelin' board salvaged from a cabinet shop dumpster. She glued them on t' motor mount tube 2-1/2" apart, ya bilge rat, then glued t' motor mount in place with t' cr's at t' forward and aft end o' t' fin slots. Then she glued t' fins into t' slots, gluin' t' tabs t' t' mmt with a generous amount o' yellow glue. Ya scallywag! Blimey! When that be dry, she selected one of my 1/4" id MicroMaxx body tubes t' use for a launch lug and glued it alongside one fin.

Amanda applying paper to nose coneAt the other end, arrr, ya bilge rat, I cut 2" off o' t' main tube, sliced it down one side, and glued it into a "coupler" sized tube t' serve as a shoulder for the nose cone. T' nose cone itself be quite t' adventure. We went shopping at Michael's and came home with a foam florists' cone, which was a light, open-cell styrofoam 4" in diameter and 12" high. Well, blow me down! I epoxied t' shoulder piece t' t' base o' it, me bucko, let it cure, and then just set in t' whittling with an X-acto #26 blade and coarse sandpaper. Well, blow me down! Arrr! Eventually I had a shape she liked. Ya scallywag! Then we mixed flour and water t' about t' consistency o' Elmer's glue, added some actual Elmer's white glue for good measure, matey, shiver me timbers, and she dipped strips o' newspaper in this and covered t' cone with it t' make a papier-mache surface. She had been doin' this in school and proved quite skillful at it. Begad! I helped a little at t' shoulder joint t' maintain a straight line.

Initially we put in about ten feet o' nylon shoelace cord for a shock cord, but she spotted 6 feet o' t' 1/2" braided elastic I use for midpower, and wanted that. We mounted it t' t' inside surfaces o' t' airframe and nose cone shoulder with an old-fashioned Estes-type three-panel shock cord mount and yellow glue. Begad! Blimey! At her insistence, we made a 36" parachute out of aluminized Space Blanket material.

Amanda launches USA while Eyeful and Firebutt waitFirebutt flew on Saturday, April 7, 2001. Aye aye! Blimey! Sadly, me hearties, me camera ran out o' film before this flight. Avast! At 11.9 oz. Avast, me proud beauty! (336 grams) liftoff weight, me hearties, it might be better named Leadbutt, but it put in an acceptable low and slow flight on a D12-3. Unfortunately, t' parachute hung up in t' mouth o' t' body tube and didn't fully deploy, me bucko, but it did destabilize t' rocket. Blimey! There be no damage and all is well with t' world. Arrr! At right: Amanda launches her USA on an A10, too quick for t' camera, while Firebutt and Eyeful wait.

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