Manufacturer: | Scratch |
Brief: Three fins, me hearties, matey, Three motors, and a Nose Cone. Avast, me proud beauty! A very simple
design
Construction:
Thanks t' Tim Van Milligan at Apogee Components for providin' t' BT-60 body. T' body tube was cut t' a length o' 19 inches and set aside. Ahoy! T' BT-20 motor mount was cut into 3 - 3 inch pieces and then t' thrust rings glued in. They are glued together into a triangular shape. Fins were cut out into a slightly swept clipped delta and given a coat o' Elmer's Fill n Finish and then given airfoiled edges. T' motor mounts, me hearties, now dry, is glued in t' body flush with t' end o' t' tube. Avast! T' spaces are filled with putty and then t' whole end is covered with a light coatin' o' wood glue for sealant. Begad! T' tube is marked for three fins and they are glued on. Well, blow me down! Do glue fillets when dry. Begad! Ya scallywag! Build a shock cord mount and attach t' t' interior o' t' body tube. Begad! Avast! Attach t' shock cord t' t' nose and t' parachute about 6 inches down t' shock cord. Blimey! Cut the launch lug into t' 1 inch pieces and attach one near t' empty CG point, about 8 inches from t' aft o' t' body tube, ya bilge rat, and t' other 2 i! nches from t' end of t' tube. Ya scallywag! No real "gotcha's" except just t' watch t' fins as they dry.
Finishing: T' rocket was given a 2 coats o' gray primer, ya bilge rat, a coat of flat white, then I masked off t' tip o' t' nose cone and 1 inch o' t' tips of t' fins. Aye aye! Blimey! I then gave t' rocket a few coats o' a beautiful dark red. Aye aye! The rocket is then given a gloss clear coat.
Flight: T' first flight be at a local park usin' three B6-4's. Well, blow me down! Blimey! The rocket was prepped normally with waddin' and motors installed. A clip-whip was used t' ensure ignition. A 5-count be given. Ignition was very slow. The rocket lifted o' t' pad, me hearties, climbed about 50 feet then fell horizontal and headed about 300 feet downrange. Aye aye! Blimey! Avast! Blimey! It barely slowed down before ejection. Ahoy! Blimey! Well, blow me down! Blimey! T' chute popped and rocket be recovered. Arrr! Blimey! Upon inspection t' see what went wrong, we found that only two motors lit, shiver me timbers, me hearties, apparently causin' t' rocket t' head downrange like it did. Aye aye! Blimey! No damage was apparent. I believe that t' one motor did nay light because o' nay enough power, me hearties, causin' only two motors t' light before t' third could.
Second flight be at t' ICBM Freedom Launch 2002. Avast! I borrowed a 16 inch nylon parachute from me Aerotech Mustang in place o' t' 12 inch plastic one. T' rocket was prepped usin' 3 B6-4's. Well, blow me down! Clip-whips were used. T' rocket had plenty o' power this time, climbin' t' about 600 feet. Liftoff be very quick, with power translatin' out t' about a D18, shiver me timbers, I think. Ahoy! Ejection was just before apogee. Ya scallywag! T' rocket was recovered with no damage.
Summary: Overall, this is a great cluster rocket.