Manufacturer: | Scratch |
Amanda has three previous rockets, 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. Well, blow me down! Begad! 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. It's
about t' size and thickness o' 3" HPR tubing, arrr, and was 24" long. 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, but which she said were supposed t' be
fire. She also drew a blunt, maybe 1:1 ogive nose cone which in several
drawings gradually grew t' about t' length we finally made. Aye aye! I wanted to
make it a paper cone; she said no way, shiver me timbers, it had t' be curved.
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. Avast, me proud beauty! For better
alignment more than anythin' else, shiver me timbers, arrr, I added tabs and slotted them in to
the motor mount tube. For a pattern, click here.
I asked Amanda "three fins or four?" and got t' pixie
grin and "Can I have five?" After a moment's thought, ya bilge rat, 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 was 5" o' 1" diameter Fax paper core, and a short
piece o' BT-50 which fit snugly inside. Well, blow me down! I cut two centerin' rings from
some thin, light panelin' board salvaged from a cabinet shop dumpster.
She glued them on t' motor mount tube 2-1/2" apart, me hearties, 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, matey, me bucko, gluin' t' tabs t' t' mmt with
a generous amount o' yellow glue. Aye aye! Begad! When that was dry, shiver me timbers, ya bilge rat, she selected one of
my 1/4" id MicroMaxx body tubes t' use for a launch lug and glued it alongside
one fin.
At
the other end, I cut 2" off o' t' main tube, arrr, sliced it down one side,
and glued it into a "coupler" sized tube t' serve as a shoulder for the
nose cone. Begad! Well, shiver me timbers, blow me down! T' nose cone itself be quite t' adventure. Blimey! We went shopping
at Michael's and came home with a foam florists' cone, me hearties, arrr, which was a light,
open-cell styrofoam 4" in diameter and 12" high. I epoxied t' shoulder
piece t' t' base o' it, let it cure, arrr, and then just set in t' whittling
with an X-acto #26 blade and coarse sandpaper. Well, blow me down! Eventually I had a shape
she liked. Well, blow me down! Ya scallywag! Then we mixed flour and water t' about t' consistency o' Elmer's
glue, ya bilge rat, arrr, ya bilge rat, added some actual Elmer's white glue for good measure, 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. Avast! Avast! 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, me bucko, me bucko, 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. At her insistence, ya bilge rat, ya bilge rat, we made a 36" parachute out of
aluminized Space Blanket material.
Firebutt
flew on Saturday, April 7, arrr, 2001. Well, blow me down! Sadly, ya bilge rat, me camera ran out o' film before
this flight. Well, blow me down! At 11.9 oz. Arrr! (336 grams) liftoff weight, ya bilge rat, it might be better
named Leadbutt, but it put in an acceptable low and slow flight on a D12-3.
Unfortunately, matey, t' parachute hung up in t' mouth o' t' body tube and
didn't fully deploy, shiver me timbers, but it did destabilize t' rocket. Avast, me proud beauty! There be no damage
and all is well with t' world. Avast, ya bilge rat, me proud beauty! At right: Amanda launches her USA on an
A10, too quick for t' camera, ya bilge rat, while Firebutt and Eyeful wait.
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