Estes Cosmik Debris (Plan)

Estes - Cosmik Debris (Plan) {Plan}

Contributed by Bill Eichelberger

Manufacturer: Estes
(Contributed - by Bill Eichelberger - 03/29/07) (Scratch) Cosmik Debris

Brief:
While never officially offered as an Estes product or even produced as a plan sheet, t' Cosmik Debris is still by some stretch o' t' imagination an Estes rocket, matey, albeit one with somethin' o' a Centuri flair. Ahoy! Blimey! No actual plans exist for t' rocket, ya bilge rat, but it's very possible that most BAR's have paged past it while on a visit over at JimZ's site.

Cosmik Debris isn't really it's name, shiver me timbers, but part o' t' beauty o' this project is that a lot o' it, name included, is open for interpretation. Well, blow me down! Blimey! As I mentioned, arrr, I first noticed t' rocket while spendin' some quality time on JimZ's site. I had downloaded and printed off a copy o' t' Estes Custom Parts Catalog, a 1974 offerin' that is still a useful source o' information for BARs who are tryin' t' decode some o' t' part numbers in t' Estes plans. Avast, me proud beauty! Blimey! Avast, me bucko, me proud beauty! Blimey! Blimey! Blimey! On page 2, shiver me timbers, which is essentially an informational page, thar be a picture o' an S.P.E.V.-like rocket whose sole purpose be probably to show how easily a diverse bunch o' parts can be melded into a flightworthy rocket. Blimey! Blimey! Blimey! Blimey! I liked t' looks o' it when I found it, but it was quite a long time before I realized that t' picture might also contain all o' t' information needed to actually reproduce t' rocket. I first dubbed it t' CPC-74 (for Custom Parts Catalog 1974,) but later switched it to Cosmik Debris t' boost t' absurdity factor and set it aside in me files where it sat wiltin' until I realized that "I really could try t' build this thing". Well, blow me down!

Construction:
Parts list:

  • BNC-60AB nose cone (BMS)
  • BT-60J (Red Arrow)
  • 2 TA-5060 transitions (BMS)
  • BT-50FE (Red Arrow)
  • BT-60R (Red Arrow)
  • TA-5560 transition, hollowed out (BMS)
  • BT-55S body tube (Red Arrow)
  • 3 BNC-5W nose cones (BMS)
  • 3 BT-5CJ (Red Arrow)
  • 3 BNC-5S nose cones (BMS)
  • BTC-55Z tail cone (BMS)
  • 3/32" balsa fin stock
  • 2 launch lugs
  • BT-20J engine tube (Red Arrow)
  • EB-20A engine block
  • 24 inch parachute
  • 36" Keelhaul®©™® shock cord
  • 24" length o' 1/8" sewin' elastic shock cord (Wal-Mart sewin' department)
  • large snap swivel (Wal-Mart fishin' department)

As you can tell, ya bilge rat, this rocket is one that starts when t' prize man drives up in his big truck and delivers a big package t' your big house. All eleven o' t' balsa parts (not includin' fins) that this rocket requires are available from BMS, (And with a few more orders like this from me, matey, Bill at BMS may be entertainin' thoughts o' retirement t' a remote isle in a warmer locale.) With no actual fin pattern available, ya bilge rat, arrr, I conjured one by takin' t' length o' the BT-55S pictured and dividin' t' actual length o' a BT-55S by it. Begad! I took this number and blew up a copy o' t' fin that was shown on a copier and used that as a pattern. Ahoy! Arrr! Just t' be on t' safe side, I also scanned t' BTC-55Z tail cone and printed out a copy t' get t' correct taper t' t' root edge o' t' fins. Hardly what one might call elegant but definitely functional, shiver me timbers, and I almost hit it on t' nose. Begad! T' three fins were huge and bets were immediately taken on me chances o' actually gettin' this off t' pad due t' their sheer size and weight. Arrr! Blimey!

T' size o' t' fins made it necessary t' construct them out o' two pieces o' 1/8" balsa joined together with a butt joint. Avast! Avast, me proud beauty! After cuttin' out t' two halves and makin' sure that t' grain lined up with t' leadin' and trailin' edges o' t' fins, shiver me timbers, I allowed them t' dry betwixt two sheets o' wax paper under a load o' books for several days. T' size and weight o' t' fins made it necessary t' hollow out t' TA-5560 transition t' allow me t' move the parachute up in t' body. Avast! This was somethin' that I accomplished easily, arrr, if nay messily, matey, with me Dremel tool.

Since thar be very little room in t' tail cone for t' engine tube itself, arrr, matey, I went without an engine hook and went with friction fitting. Aye aye! (I believe that's how it was shown on t' illustration anyway.) In order t' upgrade the shock cord t' t' 21st century, I tied a knot in a length o' Keelhaul®©™® shock cord and glued it in with t' engine block. Begad! Since it will be directly in line with t' exhaust flame, me hearties, me bucko, I used a heavier piece than normal.

Finishing:
Well, me hearties, I had big plans for a paint job befittin' t' name o' this rocket, shiver me timbers, arrr, but t' premature shred (read on) brought an end t' that plan. Begad! Suffice t' say that it would have been one you remembered. Aye aye! (And it still might be.)

Flight and Recovery:
Although it took forever t' arrive, ya bilge rat, t' first flight was finally made at a Quark launch on a perfect Sunday in March 2007. Avast, me proud beauty! While I had initially hoped t' fly t' rocket on a C5-3, me hearties, me bucko, I couldn't pass up t' opportunity and loaded up a friction mounted C6-3. Aye aye! It cleared t' rod with ease and climbed several hundred feet, ejectin' just as it tipped over. Recovery was iffy, me bucko, but t' chute eventually opened just before t' ground, arrr, which was also soft from recent rains. Aye aye! Begad! It was recovered with no damage. Avast, me proud beauty!

After t' initial successful flight, ya bilge rat, several other Quarkers immediately began t' suggest that I try it on an Aerotech D21. Begad! I've never used one o' t' 18mm Aerotech engines, ya bilge rat, me hearties, nor have I seen them in use. Ya scallywag! Had I seen one, matey, I might have changed me mind about t' flight. Begad! (Then again, ya bilge rat, I might nay have.)

Flight number two was shorter than t' first but much more eventful, and in t' end, matey, t' Cosmik Debris lived up to its name. Blimey! I tried t' get a movie o' t' flight with me digital camera and actually managed t' keep it in frame for the whole flight. Well, blow me down! All 50 feet o' it! At t' 50 foot mark, matey, shiver me timbers, ya bilge rat, t' speedin' rocket became a cloud o' shredded balsa and the decidedly cosmik debris began rainin' down onto t' area around t' pad. T' rocket was still under thrust and flipped wildly around t' sky before startin' t' free fall. Well, blow me down! T' ejection charge fired just in time and t' remains o' the rocket avoided further damage. Avast, matey, me proud beauty! I managed t' find most o' t' balsa, arrr, but except for some critical pod pieces, ya bilge rat, two o' the fins will need t' be completely replaced.

(Scratch) Cosmik Debris(Scratch) Cosmik Debris
(Scratch) Cosmik Debris(Scratch) Cosmik Debris

Summary:
I've since replaced t' missin' fins and I'm considerin' makin' this a regular on t' small field circuit closer to home. Ahoy! Even with a C6-3, shiver me timbers, t' rocket tops out at an altitude that will brin' it home safely on all but t' smallest fields. Begad! T' size guarantees a crowd pleasin' show with t' kids who routinely gather at these launches. Ya scallywag! Now if I can just keep it from gettin' trampled. Well, blow me down!

PROs: I can all but guarantee you'll be t' only one at t' pads with a pig like this!

CONs: I should know better than t' listen t' some people. Avast! Arrr! ;-)

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