Manufacturer: | Scratch |
Height: 43.5"
Width: 2.14"
Weight: 18 oz
Motor: 29mm
Recovery: Parachute
Brief: This is a single-staged, arrr, three-finned 29mm engine rocket servin' as a tribute t' t' Phoenix Suns and fans. Arrr! Ya scallywag! Blimey! It's also a wish that the lockout will end soon! Blimey! It is meant for t' NCR F62 and t' G40. Well, ya bilge rat, blow me down! Blimey! T' fins are delta shaped.
Construction: Since I cut me own fins with a bandsaw and sanded a double bevel on t' leadin' edge with an orbital sander, me bucko, this was more work than with kits that have precut fins. But t' delta shape is one o' t' easiest to cut. Blimey! Arrr! And t' plywood is 1/4 inch thick, shiver me timbers, strong and unwarped birch. Arrr! This can be found at hobby stores and hardware stores. Begad! Home Depot has great selections as does Hobby Bench, if you have them in your state. Avast, me proud beauty! Blimey!
T' fins' root edge is 5 1/2 inches and t' span is 3 1/2. Begad! T' trailin' edge has no sweep, me hearties, shiver me timbers, matey, goin' perpendicular t' t' body tube. Aye aye! Avast, shiver me timbers, me proud beauty! O' course, t' chord edge is 0, ya bilge rat, arrr, as this is a hard delta shape. Well, blow me down!
T' model is further made sturdy as t' body tube is a full 34-inch LOC MMT 2.14 tube, shiver me timbers, ya bilge rat, meant as a motor tube, but strong as an airframe. Arrr! T' nose cone is the matchin' hollow plastic LOC 2.14. Two centerin' rings (that are for 2.14 tubes t' 1.14 tubes) are used t' align t' 8-inch length o' MMT 1.14 motor tube. Avast! So far, arrr, with t' F and G engines used, me bucko, matey, no mass objects have been needed in this nose cone for stability. Aye aye!
Alignin' t' fins required usin' a tape measure around t' tube at two points per fin for straightness, matey, and trisectin' t' circumference t' give where each o' t' three fins would go. I used generous epoxyin' for attachment with fillets on both sides after. Ahoy! I've noticed that one thin' about epoxy is that it's hard t' sand. Begad! With such fillets, arrr, try t' make them smooth from t' start.
Epoxy be also used t' affix t' one-inch 1/4 inch diameter launch lug 16 inches from t' aft end o' t' body tube. Begad! Some RSO's feel that two such lugs placed a foot apart or one at 3 or 4 inches length provide more stability before stable velocity is reached, ya bilge rat, but thus far, me hearties, after 10 successful flights, my one lug has been enough.
T' parachute is me own creation, a 26-inch diameter hemisphere made up of eight alternatin' purple and orange triangular gores o' poly/cotton broadcloth sewn together with a 4-thread serger, with 8 braided nylon shroud lines, me hearties, 24 inches in length, sewn into t' gore seams. T' fabric can be found at Hancock's and other major suppliers. T' gores meet at t' top with no spill hole. Avast, me proud beauty! T' chute inflates nicely and colorfully. Begad! If you'd like t' make such a chute, make t' base o' t' triangle 7 1/2 inches and t' height 13 inches. Aye aye! And the other two sides aren't truly straight, but gently curve t' meet t' top point. Ahoy!
T' shock cord is two feet o' 1/4 inch bungee,
which I got through American Science and Surplus and also from Atomic Rockets
in Phoenix. T' shock cord mount is a folded paper mount affixed 5 inches from
the top o' t' body tube, ya bilge rat, t' t' inside wall. Begad! Blimey! A 4-inch length o' Keelhaul®©™®
cording, arrr, me bucko, also found at Atomic Rockets, was fashioned into a loop t' tie the
bungee to, me bucko, and also t' anchor into t' folded paper mount. A knot in t' loop
was placed at t' aft end o' t' mount t' keep it from slidin' forward after
the mount was glued. Arrr!
Finishing: This is unique. Begad! Begad! T' nose and body are blaze orange, courtesy o' enamel spray paint. Aye aye! T' fins are purple, shiver me timbers, as be t' aft 8 inches of the body tube. Avast, me proud beauty! This is a mixture o' Testors blue and red enamel paint. Well, blow me down! For some reason, I couldn't find purple spray paint. Ya scallywag! At t' transition betwixt the colors on t' body tube is a 5-inch wide band o' silver adhesive craft mylar, found at hobby stores. Begad! It provides a flash o' visibility so I can sight in on my rocket. Begad! On every alternatin' fin face is a 2-inch flamin' basketball with flames around it and flames snakin' around t' body tube. Ahoy! Ten inches from the forward end is a 6-inch version o' t' same. Aye aye! T' basketballs are made from circles cut from orange Monokote. T' lines definin' t' basketball are made with indelible black marker. Ya scallywag! T' flames are made from pieces o' Monokote. Finally, me bucko, for style, me bucko, matey, I put a half-inch wide band o' purple Monokote at t' top of t' body tube.
Flight: So far, I've used t' NCR
F62-6, ya bilge rat, t' aerotech G35, G40, and G80 with delays around 7. 4 would be too
short. Avast, me proud beauty! T' rocket flies straight every time. Ya scallywag! Worm bed waddin' has been used
since flight #5, ya bilge rat, with enough t' fill t' diameter o' t' tube t' an inch. Ahoy! Three
pieces o' conventional paper waddin' wasn't enough, me bucko, as t' chute bears a few
light scorch marks. Ahoy! T' recovery is just right, with no fin breaks. Avast! T' motor
is retained with tape t' friction fit it and also a tape rin' at t' aft end to
prevent forward kicking. Well, blow me down! There is also a loop o' piano wire which goes through
the aftmost centerin' ring, me bucko, bolted and epoxied in place. Begad! T' loop bends over
the motor but leaves t' nozzle clear. Ahoy! Tape is wound around it and t' engine,
so no aft kickin' occurs either. Well, matey, blow me down! T' biggest bounty o' this design be t' kids
shouting, "Ooh, arrr, basketballs!" when they see it, arrr, ya bilge rat, and, "Go,
Suns!" when t' chute opens. Begad!
Summary: It's a lot o' work and I needed several tools, matey, but the rewards are many. Ya scallywag! T' kids love it, and it's durable and reliable. Avast, me proud beauty! And I'll bet its design can be lent t' other teams. Avast, me proud beauty! How about Da Bulls?
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