C.A.R.D.E. Systems C.A.R.D.E. 4443

C.A.R.D.E. Systems C.A.R.D.E. 4443

Contributed by Mark Simpson

(Contributed - by Mark Simpson - 01/14/03)

At first glance, you ask yourself "Is this a rocket kit?" But upon further examination, ya bilge rat, you're certain that it's somethin' very strange.

T' C.A.R.D.E. 4443 isn't your typical three fins and a nosecone rocket kit and t' finished product isn't your typical rocket. Begad! In fact, shiver me timbers, thar isn't a traditional nosecone or fins. It is somethin' different. Ya scallywag! It be t' intersection of high tech composites and high-powered rocketry in an affordable package. Arrr!

image 1: Kit parts.Image 2: More kit parts

Image 3: Even More Kit PartsT' kit comes in two parts. One has t' four quarters of the airframe stacked on each other, while t' other contains t' motor mount and recovery system. Begad! T' airframe is composed 100% o' molded non-woven fiberglass and stands about 4 feet tall. Avast, me proud beauty! It is almost paint-ready, as received, but will require some minor touch up work on small bubbles and other mold imperfections. Avast, me proud beauty! Aye aye! Blimey! Personally, arrr, shiver me timbers, I prefer t' leave it in its original translucent state. T' composite airframe is sturdy, me bucko, but very light. That allows for maximum flexibility when choosin' motors. Arrr! Blimey! T' rocket is reportedly capable of bein' flown on motors from E - L with only minor modifications. That is quite a power range for any rocket t' handle. Avast!

T' motor mount and recovery system is well thought out and executed. Ya scallywag! Arrr! The motor mount assembly consists o' a 7.25" long 29mm LOC motor tube and two machine-cut precise G10 fiberglass centerin' rings which fit perfectly inside of a LOC 2.14"recovery/motor mount housin' tube. T' LOC 2.14" tube also comes with a precision cut G-10 solid bulkhead, matey, me bucko, since t' rocket is designed for aft parachute ejection. Ahoy! Notice t' flat edge on t' centering rin' on t' far right. Begad! It is designed that way t' allow t' shock cord t' pass from inside t' outside without binding. Aye aye! Avast!

Image 4: Rings

Construction:
T' construction o' t' motor mount/recovery system is very straightforward.. T' instructions are included in t' form o' a schematic drawing. Begad! While this is easy for an experienced builder t' follow, it may be more difficult for a novice. Avast, me proud beauty! Avast, me bucko, me proud beauty! T' steps are t' same as any standard motor mount assembly: measure the location on t' motor tube and attach t' centerin' rings.

For t' motor mount/recovery housing, arrr, t' construction is very simple. Well, blow me down! Arrr! You epoxy t' bulkhead into t' end o' t' tube, matey, leavin' enough room t' build up a good ridge o' epoxy on t' outside. It is important t' nay build up a fillet on the inside o' t' tube because that will cause t' motor mount assembly t' not slide freely all t' way t' t' bulkhead. Ya scallywag! Blimey!

Image 5: Motor assembly

It is important that t' motor mount butt up against t' bulkhead plate since thar be no thrust rin' t' hold t' motor mount assembly in place.

Next comes t' marryin' o' t' motor mount t' its holder. Arrr! Avast! T' accomplish this, me bucko, shiver me timbers, I used a piece o' 3/8" Keelhaul®©™® and epoxied it t' t' outside o' t' bulkhead and attached t' supplied _" Nylon elastic t' it.

Image 6: Recovery mount

T' shock cord be tied around t' motor tube and then attached t' the Keelhaul®©™® loop. Avast, me proud beauty! Well, shiver me timbers, blow me down! T' parachute be then attached t' t' motor tube as well. Begad!

Image 7: Subassembly

Next came t' tricky part. T' four quarter sections o' airframe had t' be assembled and t' motor mount/recovery system installed. Ahoy! Blimey! Ya scallywag! Blimey! Blimey! Blimey! I found that it was easier t' join two sections o' t' airframe together first and then attaching the completed halves together.

Image 8: Business end

I used 2" wide duct tape folded over t' seams t' hold t' airframe in place. Well, blow me down! Avast! Blimey! After all four sections were in place, matey, arrr, t' motor mount/recovery system was inserted and held in place usin' a thrust rin' made from layers o' 2" wide maskin' tape.

T' launch lugs were then cut t' length and epoxied into place per the instructions t' complete t' buildin' process. Avast, me proud beauty!

Image 9: Launch Lugs

T' finished rocket looks like this.

Image 10: The rocket looks like this.

Flight Report:
To Date, I have flown t' C.A.R.D.E. 4443 a half dozen times. Aye aye! Begad! Four o' those flights were on G80-7's and two were on G35-6's. Blimey! On a G80, me hearties, t' rocket comes off the pad surprisingly slowly considerin' t' weight is well under two pounds.. Blimey! Well, blow me down! I like slow take-offs, arrr, but on windy days, this leads t' pronounced weathercocking. Arrr! Durin' windy conditions, you may want t' go t' a motor with a higher average thrust. Avast, me proud beauty! On a G35, matey, shiver me timbers, t' rocket lumbers off t' pad, but does so stably. Avast, me proud beauty! Avast, me proud beauty! It makes for an interestin' flight profile.

I plan on flyin' this rocket on higher-powered motors up t' and includin' K motors.

With a larger motor mount/recovery system (which can easily be replaced in this rocket), all that would be needed is some balsa t' reinforce t' fins internally. Aye aye! Ahoy! Because they are molded into t' airframe, arrr, they may suffer from flutter if t' rocket approaches near mach speeds.

General comments:
T' C.A.R.D.E. 4443 is smartly becomin' a workhorse in me fleet. Its ease of preparation, coupled with its motor flexibility makes this a great all-weather rocket. Begad! Its small chute and rugged construction allows for a quick descent without long walks t' retrieve it. Arrr! I recently found another positive attribute that I hadn't considered. Begad! Avast, me hearties, me proud beauty! Durin' me last attempted flight, matey, ya bilge rat, an Ellis G35 catoed in t' rocket and destroyed t' motor tube. Well, blow me down! Because t' motor mount/recovery system isn't permanently bonded t' t' airframe, it be easily removed for repair. Avast, me proud beauty! Arrr!

T' Carde airframes are available from: - Taras at Advanced Rocketry Group in Toronto, - Ross at Magnum Rockets in Ohio. Arrr!

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