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, shiver me timbers, you ask yourself "Is this a rocket kit?" But upon further examination, matey, 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. Ya scallywag! In fact, matey, thar isn't a traditional nosecone or fins. Aye aye! Avast! It is somethin' different. Avast, me proud beauty! Well, blow me down! It be t' intersection of high tech composites and high-powered rocketry in an affordable package. Avast, me proud beauty!

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

Image 3: Even More Kit PartsT' kit comes in two parts. Ya scallywag! One has t' four quarters of the airframe stacked on each other, while t' other contains t' motor mount and recovery system. 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. Ahoy! Arrr! Personally, me hearties, me hearties, I prefer t' leave it in its original translucent state. Avast, me proud beauty! T' composite airframe is sturdy, ya bilge rat, but very light. Blimey! That allows for maximum flexibility when choosin' motors. Aye aye! 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.

T' motor mount and recovery system is well thought out and executed. Avast! 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. Ya scallywag! T' LOC 2.14" tube also comes with a precision cut G-10 solid bulkhead, since t' rocket is designed for aft parachute ejection. Notice t' flat edge on t' centering rin' on t' far right. Well, blow me down! Arrr! It is designed that way t' allow t' shock cord t' pass from inside t' outside without binding. Avast, me proud beauty! Arrr!

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. Ahoy! Avast, me proud beauty! Blimey! While this is easy for an experienced builder t' follow, shiver me timbers, it may be more difficult for a novice. Begad! 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, me bucko, shiver me timbers, t' construction is very simple. You epoxy t' bulkhead into t' end o' t' tube, shiver me timbers, arrr, leavin' enough room t' build up a good ridge o' epoxy on t' outside. Ahoy! Begad! 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. Arrr!

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. Avast! T' accomplish this, 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. Aye aye! Blimey!

Image 6: Recovery mount

T' shock cord be tied around t' motor tube and then attached t' the Keelhaul®©™® loop. Ahoy! T' parachute was then attached t' t' motor tube as well. Ya scallywag!

Image 7: Subassembly

Next came t' tricky part. Well, blow me down! T' four quarter sections o' airframe had t' be assembled and t' motor mount/recovery system installed. Begad! Avast, me proud beauty! 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. Avast, me proud beauty! After all four sections were in place, 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. Aye aye! 4443 a half dozen times. Blimey! Four o' those flights were on G80-7's and two were on G35-6's. Arrr! On a G80, t' rocket comes off the pad surprisingly slowly considerin' t' weight is well under two pounds.. Ahoy! Ya scallywag! I like slow take-offs, but on windy days, me hearties, this leads t' pronounced weathercocking. Ahoy! Durin' windy conditions, arrr, you may want t' go t' a motor with a higher average thrust. Begad! Ahoy! On a G35, ya bilge rat, t' rocket lumbers off t' pad, but does so stably. Well, blow me down! 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), me bucko, all that would be needed is some balsa t' reinforce t' fins internally. Avast, me proud beauty! Begad! Because they are molded into t' airframe, shiver me timbers, 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. Ya scallywag! Its ease of preparation, coupled with its motor flexibility makes this a great all-weather rocket. Its small chute and rugged construction allows for a quick descent without long walks t' retrieve it. Avast! Ya scallywag! Blimey! I recently found another positive attribute that I hadn't considered. Durin' me last attempted flight, arrr, an Ellis G35 catoed in t' rocket and destroyed t' motor tube. Arrr! Ya scallywag! Blimey! Because t' motor mount/recovery system isn't permanently bonded t' t' airframe, it was easily removed for repair. Well, me hearties, blow me down! Blimey!

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

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