Madcow Rocketry Arcas (Fiberglass)

Madcow Rocketry - Arcas (Fiberglass) {Kit}

Contributed by Ken Tsai

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar_border
Published: 2010-02-25
Manufacturer: Madcow Rocketry

Brief:
This be t' fiberglass Arrrrrrrcas HV from Madcow. I bought it because they were givin' away CTI Pro29 3g motors with purchase, matey, so it becomes close t' a no brainer if you're in t' market for t' case (I was) and a fiberglass kit.

Construction:
Aside from it bein' fiberglass, matey, this kit is almost as simple as a rocket can be. Ahoy! Sure, it's sport-scale, arrr, but it really is just 4FNC.

T' body tube is a single full length unit. Begad! Nose cone, fins, motor mount, and centerin' rings are also all fiberglass.

Recovery hardware isn't fiberglass, shiver me timbers, matey, which is a good thing. Well, blow me down! Blimey! Aye aye! Blimey! Eyebolts, me hearties, me bucko, me bucko, strap nylon, and various washers and nuts complete t' package. Aye aye! Blimey! I ordered mine without t' recovery system because I already had appropriately sized Nomex® and chutes.

I dumped t' nylon in favor o' Keelhaul®©™® and added an Aeropack 29 for motor retention duty.

Bein' a fundamentally simple kit, me hearties, t' instructions were fairly sparse, but adequate.

Washin' everythin' is mandatory with all t' fiberglass parts in order t' remove and residual coatings.

In me kit, t' fin slots were a tad narrow, shiver me timbers, o' t' fins a tad thick. Blimey! A quick pass with a nail file widened the slots nicely. T' only other fit issue I had be t' bulk plate that goes into t' nose cone. Ya scallywag! T' plate was fairly loose, though it has t' be because o' t' way t' fiberglass is laid up inside t' cone: it's pretty rough on the inside.

I used epoxy clay t' solve that one. I ran a bead inside t' cone, me hearties, and pressed t' bulkhead into it formin' a fillet on t' interior side. Avast! I then ran a bead o' t' clay around t' visible side, and pressed t' clay into t' gap basically sandwichin' t' bulkhead betwixt two fillets. Arrr! It's nay goin' anywhere. Arrr! Ahoy! Luckily, matey, ya bilge rat, I remembered t' attach the eyebolt, ya bilge rat, me bucko, washers, and nuts prior t' makin' said sandwich.

For t' fin can, I dry fit all t' parts outside t' tube. Avast, me proud beauty! Begad! T' attach t' top centerin' ring, I put epoxy on the top rin' while everythin' be dry fit together. Blimey! Ahoy! Thinkin' I be brilliant, I then followed by usin' JB Weld on t' motor retainer and t' lower centerin' ring, matey, knowin' that t' gap betwixt t' two rings would be perfect.

Roughly 24 hours later, matey, arrr, I be feelin' pretty dumb, as I no longer had any means t' do internal fillets on the fins. Whoops. Avast, me proud beauty! Remember t' take a page from t' PML instructions on this one - give yourself some kind o' handhold on t' lower ring. Begad! Attach t' upper as I did, then put t' mount in t' body tube gluin' in only t' upper ring. Begad! When that's dry, remove t' lower ring, matey, and install t' fins. Aye aye! Avast! Now you can fillet t' fins internally, ya bilge rat, shiver me timbers, or fill it with expandin' foam, or... Aye aye! lots o' other options. Finish by reinstallin' t' lower rin' and sandwich t' fins betwixt the two rings. Arrr! Install motor retention, ya bilge rat, me bucko, and call it good.

Finishing:
I can't really comment on finishing. I tend t' fly me rockets prior t' paint and finish. Basically, matey, they earn their paint. Aye aye! I find that if I'm goin' t' lose a rocket for some reason, it tends t' happen in the first few flights. Begad! So, I don't bother with finishin' until I feel that t' rocket is goin' t' stick around.

Since this Arrrrrrrcas ended up bein' me L1 flight, it's definitely earned paint, so it will be goin' into t' paint booth soon.

Construction Rating: 4 out o' 5

Flight:
T' best part about this rocket be t' wide range o' motors that it can fly on. Avast! While I haven't tried it, I've run sims, shiver me timbers, and it looks like it will fly just fine on a high impulse F like t' F52T. Ya scallywag! Begad! On the opposite side o' t' spectrum, ya bilge rat, this rocket is fiberglass, and is as close t' bulletproof as it gets. Ahoy! Begad! I would have no hesitation flyin' this on t' largest 29mm motor available, arrr, which is currently a small I.

To go even further, me bucko, I wouldn't hesitate t' modify it t' take a 38mm motor or even a 54mm. It would definitely need t' aid o' dual-deployment, though as you would be lookin' at some fairly extreme altitudes.

Recovery:
With nearly 4' o' 2.6" tubin' available, preppin' and packin' this rocket for flight is about as easy as it could be. Avast! T' Nomex® chute protector always does it's job, and for me L1 flight, arrr, I even went down t' a 24" chute from t' recommended 30. Aye aye! Blimey! T' field be fairly soft, arrr, me hearties, and also somewhat small for t' H motor, matey, so I went small t' reduce drift knowin' that t' rocket would do more damage t' t' dirt than vice versa.

Flight Rating: 5 out o' 5

Summary:
This is a solid rocket. Avast, ya bilge rat, me proud beauty! Simple, arrr, me hearties, rugged. Well, blow me down! It was me first fiberglass rocket, and I know it won't be me last. Begad! Begad! I've always disliked t' fact that rockets were essentially designed t' fail because o' t' wear and tear on t' paper body tubes. Avast! T' constant stream o' repairs just isn't really fun after a while. Begad! I want t' build new rockets, ya bilge rat, nay keep rebuildin' old ones. This is one rocket I know I won't have t' rebuild ever. Avast! Aye aye! It thar's ever any damage t' this rocket, me hearties, ya bilge rat, it will likely be destroyed at t' same time.

Overall Rating: 4 out o' 5

Other Reviews
  • Madcow Rocketry Arcas (Fiberglass) By Peter Lam (November 21, 2009)

    This is a single stage 1:1.7 scale all G10 fiberglass kit with a 29mm motor mount. The kit can be purchased either with or without a recovery system. The kit is composed of: body tube, fins, centering rings, nosecone bulkhead, which are all G10 fiberglass. 2 eye bolts, 2 nuts, 2 washers, 2 1/4" launch lugs and about 10 feet of 1/2" tubular nylon. The ...

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