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, matey, arrr, rockets were built. After ponderin' for a while
on how t' contribute t' t' silliness, me hearties, I decided t' act on somethin' I'd
overheard earlier in t' week. I'd make a rocket out o' a flight registration
form. Begad!
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. Well, blow me down! Begad! There
were plenty o' spare forms, so I took one and filled it in.
A large area at t' bottom o' t' form is intentionally left blank, me hearties, as the sayin' goes. This was cut off. Avast! A half circle cut and rolled from this piece became t' nose-cone; another piece, ya bilge rat, formed into a cylinder, became t' cone's shoulder. Ahoy!
T' rest o' t' form became t' body tube. T' left side o' t' form was the tail end. Ya scallywag! Three equidistant lines were marked, then cut out as fin location slots. Ahoy! T' top margin, bein' blank, matey, became an overlap for glue.
Three fins were cut from a piece o' suitable size balsa that happened t' be available. Blimey! Begad! A motor mount was made from a spare piece o' BT-20, shiver me timbers, ya bilge rat, with a thrust rin' made from about 1/2" cut from a spent 18mm motor casing. Arrr! Begad! 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! Avast, me proud beauty! T' fins, rings and tube therefore became a complete fin can which be 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. Well, blow me down! A launch lug made from a piece o' drinking straw was glued t' t' body, arrr, aligned along and attached t' t' seam where the form had been glued t' make t' tube. Begad! A good dollop (real precision measurement here - not!) o' plasticene in t' nose-cone put t' CG safely forward, me hearties, and with a C class motor installed, t' rocket passed a swin' test. Ya scallywag! Aye aye! (Bear in mind that this be at a rocketry event, matey, so I did nay have access t' me computer. In the absence o' VCP, shiver me timbers, I had t' resort t' t' old way o' checkin' stability!)
Flight
Before puttin' t' rocket on t' pad, I had t' show it t' t' RSO, of course. Begad! Blimey! This was 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, me bucko, I also had a duplicate, more conventional form!)
It be after t' rocket was on t' pad that I finally decided that t' balsa used for t' fins was too thin and flexible. Aye aye! 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, ya bilge rat, or anticlockwise, side o' each fin. Arrr! Ya scallywag! 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. Well, blow me down!
T' rocket carried an Estes C6-3 t' send it up, 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, I had filled in t' form usin' a ball-point pen, so I can't
change t' details for t' next flight. (Unless I use Tipp-Ex...)