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