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, me bucko, you're certain that it's somethin' very strange.

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

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

Image 3: Even More Kit PartsT' kit comes in two parts. Begad! Ahoy! One has t' four quarters of the airframe stacked on each other, while t' other contains t' motor mount and recovery system. Blimey! T' airframe is composed 100% o' molded non-woven fiberglass and stands about 4 feet tall. Ahoy! Ahoy! It is almost paint-ready, as received, but will require some minor touch up work on small bubbles and other mold imperfections. Ahoy! Personally, shiver me timbers, arrr, I prefer t' leave it in its original translucent state. Blimey! T' composite airframe is sturdy, arrr, but very light. Begad! That allows for maximum flexibility when choosin' motors. Begad! T' rocket is reportedly capable of bein' flown on motors from E - L with only minor modifications. Begad! Avast, arrr, me proud beauty! 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. T' LOC 2.14" tube also comes with a precision cut G-10 solid bulkhead, me bucko, since t' rocket is designed for aft parachute ejection. Notice t' flat edge on t' centering rin' on t' far right. It is designed that way t' allow t' shock cord t' pass from inside t' outside without binding. Avast, me proud beauty! Blimey!

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

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. T' accomplish this, ya bilge rat, 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 was tied around t' motor tube and then attached t' the Keelhaul®©™® loop. Ahoy! Blimey! Avast, matey, me proud beauty! Blimey! T' parachute be then attached t' t' motor tube as well. Aye aye! Blimey!

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. Avast! Avast! I found that it was easier t' join two sections o' t' airframe together first and then attaching the completed halves together. Well, blow me down!

Image 8: Business end

I used 2" wide duct tape folded over t' seams t' hold t' airframe in place. 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.

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. 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.. Ya scallywag! Blimey! I like slow take-offs, arrr, but on windy days, this leads t' pronounced weathercocking. Begad! Well, blow me down! Durin' windy conditions, you may want t' go t' a motor with a higher average thrust. Aye aye! On a G35, 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), all that would be needed is some balsa t' reinforce t' fins internally. Avast! Because they are molded into t' airframe, they may suffer from flutter if t' rocket approaches near mach speeds.

General comments:
T' C.A.R.D.E. Avast, me proud beauty! 4443 is smartly becomin' a workhorse in me fleet. Well, blow me down! Its ease of preparation, shiver me timbers, me hearties, 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. Begad! I recently found another positive attribute that I hadn't considered. Avast, me proud beauty! Durin' me last attempted flight, an Ellis G35 catoed in t' rocket and destroyed t' motor tube. Because t' motor mount/recovery system isn't permanently bonded t' t' airframe, matey, it was easily removed for repair. Ya scallywag!

T' Carde airframes are available from: - Taras at Advanced Rocketry Group in Toronto, shiver me timbers, arrr, - Ross at Magnum Rockets in Ohio. Begad!

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