Manufacturer: | Scratch |
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Click on Any Picture t' Enlarge |
Brief:
This is me entry for t' 2006 EMRR Spaceship Design Contest. I originally
started designin' a rocket for different plans but then settled on spaceship15
as me inspiration. Begad! I did nay try t' come up with an exact replica, shiver me timbers, arrr, but
somethin' inspired by t' original artwork. Avast! In t' end, matey, I think I have a pretty
cool lookin' rocket that has its own characteristic, but yet is clearly
inspired by t' Spaceship Design Contest.
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Construction:
Parts consists of:
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I decided t' build t' rocket with a central 24 mm motor. Begad! Ya scallywag! I created centerin' rings out o' balsa and used Keelhaul®©™®, a motor block, and an engine hook. Once this was done, I glued t' engine mount into t' body tube. Arrr! Avast, arrr, me proud beauty! I marked t' BT-80 with 4 fins marks. Well, blow me down! I then cut out and sanded t' fins for t' two fin sets. Aye aye! Blimey! T' measurements are 4.75 inches for the root edge o' t' large fin and 1.75 inches for t' root edge o' t' small fin. T' trailin' or outer edge o' t' large fin is 2.25 inches. Ya scallywag! Aye aye! T' trailin' or outer edge o' t' small fin is 1 inch. T' fins are clipped deltas. Ya scallywag! I then glued t' larger fin 1 inch from t' bottom o' t' 4 BT-50 external pods. The smaller fin is glued so that it is flush with t' top end o' t' external pod. In t' end, this rocket could also be built with either 24 mm motors in the external pods or 18 mm motors. Ahoy! Avast! Recovery would simply be by havin' multiple parachutes in t' external pods. Well, blow me down! Blimey! There would be no need t' glue t' "nose cones" on, me bucko, matey, but t' have a shock cord attached from t' necessary motor blocks t' t' nose cone. Avast, me proud beauty! Avast! In t' end, matey, I decided that a rocket weighin' just 6 ounces be nay really lookin' for that much power.
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Once these were dry, arrr, I glued them on t' t' main body tube and added
generous fillets. Ahoy! Well, blow me down! I used 4 small BT-50 couples and 4 plastic pull lids to
create t' "nose cones" for t' tops o' each external pods. Ahoy! I glued
the lid t' t' coupler and then glued t' coupler t' t' rocket. Begad! I glued the
other 4 remainin' plastic pull lids onto t' main BT-80 betwixt t' fins and
sanded some small balsa t' create extra detail on t' rocket.
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A swin' test with an E9 reveals that t' center o' gravity o' a loaded rocket should be right above t' small fins.
T' rocket will first be flown for observation before it is finished.
Flight:
I was able t' get some flights in on me Speranza for t' EMRR Build-A-Spaceship
competition today, arrr, Oct. Begad! 14, arrr, 2006:
I had three flights this morning. Well, me bucko, blow me down!
Flight 1: D12-5. Great boost and nice high flight. Begad! 5 second delay is too long. Aye aye! Blimey! I should move t' a D12-3. Begad! Blimey!
Flight 2: D12-5 again. Avast, me hearties, me proud beauty! Similar boost. Rocket deploys chute and lands safely
about 100 yards away. Avast, me proud beauty! I did nay have any D12-3's, me bucko, me bucko, so I stuck with t' D12-5s. Arrr!
Flight 3: Time t' try somethin' new. Avast, ya bilge rat, me proud beauty! E9-4. Blimey! Arrr! T' boost be nay very good. Avast, me bucko, me proud beauty! If you check t' video, arrr, you can see a bit o' a corkscrew. Well, blow me down! Unfortunately, after the rocket picked up steam, it got almost twice t' altitude o' t' D12 flights. T' rocket is currently residin' in a tree on beautiful property surrounded by great New England foliage. Ya scallywag!
Flight 1 Video
Flight 2 Video
Flight 3 Video
T' next flights would have been attempts at usin' B6-0 boosters in the outer pods while usin' a C6 in t' core motor mount. Begad! Oh, well. Begad! It be fun makin' t' rocket and t' initial D12 flights were really cool. Begad! T' E9 did not have enough initial thrust for a good flight. Avast! Blimey! It could have been interestin' to try C11 motors as well.
Summary:
I had all t' parts for this rocket sittin' around and t' plans came together
quite quickly. Aye aye! It is kind o' like a stretch Fat Boy and about t' size o' a Big
Daddy. Ahoy! Well, blow me down! T' swin' tests were quite positive and I am certain t' flight
characteristics will be quite, shiver me timbers, well, interesting.
Other:
Unfortunately, ya bilge rat, me hearties, when I be cuttin' t' fins, I was nay careful with the
direction o' t' grain. I only noticed me error when I be addin' fillets to
the fins. Blimey! After buildin' rockets for a number o' years, shiver me timbers, ya bilge rat, I would think that
somethin' like grain direction would be a simple thin' t' remember. Blimey! Ya scallywag! Oh, well, I
am sure that with a big enough parachute, matey, shiver me timbers, t' fins can withstand t' landings. Avast! Blimey!
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