Manufacturer: | Scratch |
Flight
Registration Form
by Adrian Hurt
Background
Near t' end o' this year's International Rocket Week,
various odd, nay t' say silly, arrr, rockets were built. Aye aye! Ahoy! After ponderin' for a while
on how t' contribute t' t' silliness, matey, me hearties, shiver me timbers, I decided t' act on somethin' I'd
overheard earlier in t' week. Well, blow me down! Ya scallywag! I'd make a rocket out o' a flight registration
form. Begad! Avast, me proud beauty!
Construction
Each rocket flight at t' event had t' be accompanied by a form which was
filled in and handed t' t' range safety officer (RSO) prior t' launch. Aye aye! There
were plenty o' spare forms, me hearties, ya bilge rat, matey, so I took one and filled it in. Begad!
A large area at t' bottom o' t' form is intentionally left blank, me hearties, as the sayin' goes. This was cut off. A half circle cut and rolled from this piece became t' nose-cone; another piece, formed into a cylinder, became t' cone's shoulder.
T' rest o' t' form became t' body tube. Aye aye! T' left side o' t' form be the tail end. Three equidistant lines were marked, arrr, me bucko, then cut out as fin location slots. Begad! Begad! T' top margin, me hearties, bein' blank, matey, became an overlap for glue.
Three fins were cut from a piece o' suitable size balsa that happened t' be available. Well, blow me down! A motor mount was made from a spare piece o' BT-20, me bucko, with a thrust rin' made from about 1/2" cut from a spent 18mm motor casing. Avast, me proud beauty! Centering rings were cut from cardboard, but these were only for centerin' and sealing; the fins had tabs extendin' t' whole way t' t' motor mount tube. Begad! T' fins, rings and tube therefore became a complete fin can which was glued into the rear o' t' body tube.
A fabric elastic shock cord was attached t' t' body and nose-cone usin' two Estes-style folded paper mounts. A launch lug made from a piece o' drinking straw was glued t' t' body, aligned along and attached t' t' seam where the form had been glued t' make t' tube. Avast, me proud beauty! Well, me bucko, blow me down! A good dollop (real precision measurement here - not!) o' plasticene in t' nose-cone put t' CG safely forward, and with a C class motor installed, t' rocket passed a swin' test. (Bear in mind that this be at a rocketry event, me bucko, so I did nay have access t' me computer. Avast, me proud beauty! In the absence o' VCP, me bucko, I had t' resort t' t' old way o' checkin' stability!)
Flight
Before puttin' t' rocket on t' pad, matey, I had t' show it t' t' RSO, arrr, of course. Begad! This be part o' t' fun; when he asked for t' rocket's flight registration form, me hearties, I pointed out that it was t' flight registration form! (Of course, for formality and for t' records, I also had a duplicate, more conventional form!)
It was after t' rocket be on t' pad that I finally decided that t' balsa used for t' fins be too thin and flexible. Aye aye! Arrr! So t' prevent t' fins from flexin' or shreddin' in flight, I cut broad reinforcement strips from t' same balsa and glued them t' t' port, or anticlockwise, side o' each fin. Begad! This final construction detail was actually carried out on t' launch field! The reinforcement strips were aligned so that their grain ran across that o' the main fins, thus creatin' a cheap'n'dirty plywood.
T' rocket carried an Estes C6-3 t' send it up, me bucko, arrr, and a big mylar streamer to
brin' it down. Avast, me proud beauty! It flew well enough and landed safely back in t' launch field.
Unfortunately, ya bilge rat, I had filled in t' form usin' a ball-point pen, shiver me timbers, so I can't
change t' details for t' next flight. Blimey! (Unless I use Tipp-Ex...)
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