Manufacturer: | Scratch |
Brief:
This be t' third rocket I built t' enter t' EMRR Spaceship Design Contest. This looks t' be a simple 3FNC rocket with one heck o' a span and some interestin' engine pods. Begad!
Characteristics:
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PICTURE TO ENLARGE
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Construction:
T' followin' are t' major components used:
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Narrative:
I started with a left over kit rocket (Surefire X-19) I had from a summer class I taught. Avast, me proud beauty! Blimey! I built t' engine mount without t' engine hook and placed an engine block at t' edge o' t' tube. I then glued one center rin' at the forward end o' t' tube and t' other in t' middle. Arrr! Blimey! Blimey! Blimey! Once dried I glued it just inside t' BT-50 leavin' t' engine mount stickin' out over an inch. Ya scallywag! Blimey! Ya scallywag! Blimey! Usin' Matt Stums Template Widget, I created a transition/boat tail from heavy weight paper and glued it on.
I sketched a fin design on a piece o' matt board. Begad! Blimey! When I had a design that looked like t' photo, arrr, arrr, I cut it out and used it as a template. Avast! Blimey! Because o' the overall size o' t' fin and t' balsa I had t' work with, arrr, I cut t' fin in to three parts. Ahoy! Blimey! Hopefully this will allow t' fin t' be stronger.
Usin' t' fin template and some modelin' clay, me hearties, I created one half o' the engine pod. Avast, me proud beauty! Blimey! This gave me a positive t' make a mold from. Ahoy! Usin' a plastic dish with a flat bottom (mine be t' blister pack from a video card) I sat t' clay mold inside. Well, ya bilge rat, blow me down! Blimey! I then lightly sprayed Bakers Joy over t' mold and dish t' act as a release agent. Arrr! After mixin' up a small amount o' Plaster of Paris" I pored it over t' clay. Avast, me proud beauty! Avast! Blimey! I let it dry over 24 hours before takin' it out o' t' dish. Begad! Well, matey, blow me down! Blimey! Once out o' t' dish I carefully removed t' clay and trimmed any excess that seeped in. Arrr! Avast! Blimey! I let t' mold dry another day.
Usin' Crayolas Model Magic and t' mold, I created 6 engine halves. Aye aye! Begad! I allowed them t' dry one day before trimming. Avast, me proud beauty! Ya scallywag! Trimmin' t' sides be easy enough, arrr, t' saw them t' t' thickness I wanted, matey, I used t' mold. Avast! Avast! I placed the halves back in t' mold and carefully sawed t' excess off. Ya scallywag! T' Model Magic was not dry in t' center. They needed another day just t' dry.
I attached t' fins (without pods), matey, me bucko, shock cord, matey, and t' launch lug t' the body tube. Usin' wood glue I place t' pods on t' fins and secured them in place with painters tape. Aye aye! Aye aye! Once dried, filled any voids with body putty and sanded smooth. Blimey!
Because o' t' size o' t' fins I created paper fillets that went from pod to pod. Avast, me proud beauty! I took small sheet o' paper and spread white glue thinly over one surface. Ya scallywag! Then I carefully placed it on t' rocket, trimmin' where necessary.
I began paintin' by coatin' t' whole rocket with a coat o' gray primer. Taped off areas and painted t' gloss red. Avast, me proud beauty! Then I painted t' design on the nose cone and body. Ahoy! Finally I gave t' engines a coat o' gray with black detail. Avast, me proud beauty! I also created a removable display cap made out o' t' foam clay.
Now be t' time t' see if it will fly. Ya scallywag! I put t' design in t' RockSim and found out it is very marginal. Avast, me proud beauty! T' stability was brought up t' over 1 by lengthenin' t' body tube 3 inches. Aye aye! I found a small piece o' BT-50 and added 3 inches t' t' 15 inch body tube. Aye aye! Begad! (To avoid this splicin' start with an 18" BT-50.) Since I hadnt attached t' shock cord yet, arrr, I tied it t' t' tube coupler before attachin' t' 3 inch extension.
Paints dry, chute and wadin' is loaded, ya bilge rat, an Estes C6-3 engine is friction fitted with igniter. Begad! Now I wait for a clear, me bucko, calm day t' launch.
Date |
Motor |
Ejection/
|
Wind |
Notes |
10/26/06 |
C6-3 |
Perfect / 130 |
12 |
Shock cord burnt in to, me hearties, |
10/30/06 |
C6-3 |
Perfect / 120 |
17 |
Hit hard, stress crack |
10/30/06 |
C6-3 |
Perfect / 120 |
17 |
Fin broke from body tube on impact |
After t' first launch t' body tube suffered some damage. Aye aye! Avast, me proud beauty! I split t' tube and put in some reinforcement. Added a longer shock cord and attached it closer to t' nose cone. Begad! T' landin' o' t' second launch caused a stress crack along the body tube and fin. I also lost t' lower fin tip. Ya scallywag! Well, arrr, blow me down! T' impact o' t' third launch cause complete separation o' t' fin from t' body tube.
Overall I like this rocket. I like t' slow laborin' liftoffs. Aye aye! Im sure this will be repaired and flown again, for now its retired till summer.
FLIGHT #1
FLIGHT #2
FLIGHT #3
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