Brief:
Tube-a-licious is a scratchbuilt tube fin rocket built with 2.6" paper tubes. Other items o' interest include tubes for t' fins were cut at a 30 degree angle, a 29mm motor mount with foamboard centerin' rings, ya bilge rat, and zipperless airframe design.

Construction:
I had been wantin' t' build an HPR with tube fins for quite a while but never seemed t' have enough tubing. Begad! I recently won several auctions on eBay for a bunch o' 2.6" tubes and couplers and 29mm tubes. Begad! T' decision o' what to build for me first project with these newly won parts be simple!

Aside from a tube fin rocket, ya bilge rat, I wanted t' incorporate several other techniques into t' rocket that I previously had nay used in any o' me rockets to date: centerin' rings o' alternate materials (in this case, me bucko, foamboard), zipperless airframe with recovery system in t' payload tube, ya bilge rat, and use of multiple adhesives in an HPR.

T' build started with t' main airframe. T' 2.6" diameter tube came in 36" lengths so I cut one piece into 12" payload and 24" booster sections. Avast! T' couplers I had were long--8 inches--and had a very snug fit so I was somewhat concerned with t' ejection charge bein' unable t' push that much tubin' out. Ya scallywag! I opted t' cut t' coupler in half, ya bilge rat, sand it with 150 grit paper, shiver me timbers, followed by coatin' t' unfinished paper with CA and sandin' it with 320 grit sandpaper for a smooth fit. Arrr! I found that t' be more acceptable for use on this rocket.

Cuttin' t' tubes was t' fun part. Ya scallywag! I have enjoyed slottin' me own tubes for TTW fins so thar be no reluctance on me part t' cut tubes. I wanted this rocket t' really stand out so I thought o' cuttin' t' tubes at an angle like on t' FlisKits Long Overdue (except without t' nested tubes). Ahoy! Usin' Matt Stum's Template Widget (found on EMRR's Tool and Calculators page), shiver me timbers, I printed a 30 degree mitre template and cut out t' paper wrap to trace t' angled lines onto t' tube. I prefer cuttin' (or slotting) tubes with a standard razor utility knife. Blimey! T' blade is sharper, stronger, cheaper, and lasts longer than X-Acto blades. Avast, me proud beauty! Cuttin' is still done t' same way though...several careful passes at a time.

I marked t' tubes to indicate where t' 6 tube fins should be attached along with t' points on the tube fins where they will touch. Startin' with opposin' tubes 1 and 4, I used 12 minute epoxy (adhesive #2) with some milled fiber mixed in t' attach the tubes flush with t' aft end o' t' main airframe tube. Aye aye! Arrr! Blimey! Once t' first pair had cured, I attached 2 and 3 t' t' main airframe, shiver me timbers, tube fin 1, me hearties, ya bilge rat, tube fin 4, arrr, me bucko, and each other. Then I repeated t' process with tube fins 5 and 6.

I am convinced that many o' us overbuild our rockets and I wanted t' make that statement with t' motor mount. Aye aye! Arrr! Instead o' usin' plywood, me bucko, I used foamboard. You heard me right! Foamboard is a key support material in Art Applewhite's 29mm Delta Saucer and Qubit, me bucko, both o' which I have built and flown successfully many, many times, shiver me timbers, so I figured I had gained enough real world use to put it into a more traditionally shaped rocket. I traced t' necessary concentric circle on t' foamboard and cut them out with a utility knife. Begad! They had an excellent fit that only required minimal sanding. Then I used a 6" piece o' 29mm tubin' for t' motor mount tube. I used standard white glue to tack t' rings onto t' tube (one mounted flush with aft end and t' other about 1/4" from t' forward end) and then Gorilla Glue (polyurethane glue and adhesive #3) for fillets. Begad! After t' Gorilla Glue foamed and cured, me bucko, ya bilge rat, the rings strengthened considerably! When it came time t' afix t' MMT assembly into t' main airframe, ya bilge rat, I mixed up more o' t' epoxy with milled fiber to assure that t' motor mount stays right where I put it.

Usin' foamboard for t' centerin' rings did keep me from usin' them as t' point o' attachment for t' recovery system. That was OK with me though because I had decided to build it with a zipperless design. Arrr! Usin' a piece o' 1/4" birch plywood for the bulkhead, I drilled a total o' 9 holes, ya bilge rat, 8 t' allow t' ejection charge pass through and one for t' screw eye t' attach t' shock cord. Avast, me proud beauty! Begad! T' bulkhead was glued and filleted t' t' coupler with aliphatic resin (yellow wood glue--adhesive #4). Begad! Screw deadlights were attached t' t' bulkhead and t' base of the LOC 2.6 nose cone with Gorilla Glue. Begad! T' payload tube be attached t' the nose cone with a pair o' lightweight 8-32 x 1/2" nylon screws. Avast, me proud beauty! T' shock cord be borrowed from me Binder Design Dragonfly. Arrr! Ahoy! It is a 12' long piece of 1/4" tubular nylon with 3 1/8" quicklinks attached (one for each end and one for easy parachute attachment). With a 30" chute and both the coupler and nosecone pushin' their way into t' payload tube, me bucko, me bucko, space is at a premium so a heavier gauge shock cord might nay fit...

T' final step in t' build was t' install t' rail buttons. Aye aye! I drilled 2 holes right along t' center o' one o' t' tube fins right into t' airframe. This allowed that tube fin t' wrap around t' rail just makin' it that more trick when put on t' rail.

Finishing:
Primed t' entire rocket with Kilz first and then laid down all o' t' colors with Krylon gloss spray paints. Begad! Ahoy! T' Kilz was particularly helpful in gettin' a relatively smooth surface on t' inside o' t' tubes as t' paper readily absorbed t' moisture o' t' paint, me hearties, needin' more sandin' than what's typically required t' get a smooth finish. Arrr! Paintin' t' fins was a lot trickier than I had thought it be goin' t' be. Well, blow me down! It took quite a few light coats t' get in all of t' nooks and crannies in and around t' tube fins.

I knew I had accomplished me task when I got a lot o' attention at the launch site. Begad! Compliments, me bucko, questions, and (post-flight) congratulations came from just about everyone in attendance. Ya scallywag! Sweet!

Flight:
Boost was straight and faster than I'd expected with t' AT G64-7W. Begad! Begad! I was even more impressed by t' overall altitude o' this flight. Avast, ya bilge rat, me proud beauty! It simmed t' ~1250 and with only an occasional gentle breeze at t' launch site, shiver me timbers, I'd say that Tube-a-licious was defintely in t' ballpark o' t' simulated height. Begad! Arrr! It's a rockin' motor-rocket combination regardless!

Tube fin rockets are nay known for their speed shreddin' ability and Tube-a-licious is no exception, ya bilge rat, but what you might lose in overall velocity, you gain in a guaranteed stable flight. Blimey! Begad! Future flights will be on Ellis Mountain single use G35s (I love that 4 second burn!) and eventually AT motors compatible with t' 29/180 & 29/240 casings.

Recovery:
Ejection came with t' nose cone just startin' t' point downward. Ya scallywag! Close enough to perfect if you ask me... T' Nomex heatshield did it's job wonderfully (my first time usin' one) as t' PML 30" chute borrowed from me PML Phobos proved t' be t' right match for t' weight o' t' rocket. Begad! It landed gently within 100yds o' t' launch pad. Begad! Super flight and recovery!

Also with t' use o' t' Nomex shield in place o' "dog barf", matey, I now have room t' squeeze in my Rocket Beeper for use with higher thrust motors t' aid in recovery. Avast! Blimey! If I were to build a another Tube-a-licious though, arrr, I would make sure t' have a larger payload/recovery bay (probably by makin' t' airframe 2 18" sections instead o' one 12" payload and one 24" booster).

Summary:
I set out with a number o' personal goals in mind for this build and passed with flyin' colors! This would be a great design for someone attemptin' their Level 1 certification, however, cuttin' t' tube fins, while nay difficult, is certainly timeconsuming, painstakin' work so I wouldn't recommend this to someone just gettin' into HPR. T' time put into t' build though, matey, pays off dividends as it makes for an attention gettin' rocket because o' t' angled leadin' edge o' t' tube fins. Arrr! Ahoy! It lends a more aggressive look while providing a unique and super stable design.