Pemberton Technologies Kraken

Pemberton Technologies - Kraken {Kit}

Contributed by Les Bradshaw

Construction Rating: starstarstarstarstar
Flight Rating: starstarstarstarstar_border
Overall Rating: starstarstarstarstar_border
Manufacturer: Pemberton Technologies
Pemberton Technologies Kraken

Brief:
Probably no legendary sea monster was as horrifyin' as t' Kraken. Well, blow me down! Accordin' t' stories, ya bilge rat, this huge, me hearties, many armed creature could reach as high as t' top o' a sailin' ship's main mast. Ya scallywag! Ahoy! Well, me hearties, arrr, this rocket may nay have many arms, shiver me timbers, me bucko, me hearties, but it will fly higher than a ship's main mast!

This is me first kit from Pemberton Technologies, me hearties, but it won't be me last. Ya scallywag! Well, blow me down! They even supplied RockSim files, me bucko, ya bilge rat, ya bilge rat, that they graciously allowed me t' include with this review.

T' Kraken is a single stage tube fin rocket. Well, blow me down! I felt what made it unique was how t' tube fins were pointed.

Construction:
T' rocket came with 2 BT-60 body tubes, one o' which will be cut up into t' tube fins, a 24mm motor tube with 2 centerin' rings, arrr, a balsa wood nose cone with a screw eye and a washer for weight, two 1/4" launch lugs, 60" of Keelhaul®©™® cord, ya bilge rat, and an 18" plastic parachute. Ya scallywag! There is a little piece o' balsa wood for t' canards. Ahoy! It also came with one of t' most amusin' set o' instructions (or destructions as they call it) that added t' t' fun o' buildin' this kit.

T' Kraken comes with 19 pages o' destructions includin' a photo quality picture o' t' Kraken. T' most difficult part o' this rocket is cuttin' t' tube fins. Begad! Begad! Nine o' t' destruction pages provide instructions, me hearties, photos, matey, drawings, cave sketches, etc. Ahoy! Begad! t' help you mark and cut t' one tube into 4 tube fins. Aye aye! With all t' information presented, shiver me timbers, arrr, making the tube fins really is nay that difficult. Well, blow me down! Ya scallywag! Make sure you use a sharp knife and take your time. Begad! Avast, me proud beauty! You mark a line along the length o' t' tube on t' top and bottom. Blimey! Marks are made at different positions and you need t' draw lines between the appropriate top and bottom marks. This creates t' unique pointed tube fins.

There is a pattern for cuttin' t' canards. I decided t' round t' edges o' t' canards. Arrr! These glue onto the balsa nose cone. Aye aye! I used thick CA t' bond t' canards since I be usin' thin CA t' seal t' balsa nose cone.

Next be t' motor mount. Begad! Glue on t' 2 centerin' rings. Avast, me proud beauty! Ahoy! You carve a notch in t' top one, me bucko, me bucko, tie t' Keelhaul®©™® cord around t' motor tube and pass t' cord through t' notch. Avast, me proud beauty! Then glue t' motor mount into t' body. Arrr! Notice I didn't mention anythin' about a thrust rin' or motor retainer? Well, thar are no such things for this kit. Aye aye! The destructions warn you t' avoid pitchforks, shiver me timbers, torches, shiver me timbers, and mob mentality, and simply use maskin' tape or duct tape to create a thrust rin' on t' motor itself. Avast, matey, me proud beauty! Blimey! T' hold t' motor in place, t' instructions say t' wrap a bit o' tape between t' motor tube and this thrust rin' you created.

I finished me rocket before I glued t' tube fins on. This makes it easier t' get complete paint coverage. Begad! When I did glue t' tube fins on, matey, I opted t' use 12 minute epoxy since I would nay be able t' fillet t' joints with the paint.

T' nose weight is a fender washer. Well, blow me down! This gets glued t' t' nose cone and a screw eye goes into t' nose cone. The Keelhaul®©™® cord ties t' t' screw eye. Arrr! Unlike most folks who hate elastic, I added some in parallel t' t' Keelhaul®©™® to absorb some o' t' ejection shock.

Pemberton Technologies Kraken

Finishing:
T' biggest issue with finishin' a tube fin rocket is gettin' paint under t' tubes. Begad! Avast, me proud beauty! T' method I used was t' mask off a glue strip with maskin' tape and then paint t' pieces before gluin' them together. Ya scallywag! Ahoy! I first filled t' tube spirals with Elmer's Wood Filler and sanded with different grades o' sandpaper down t' 320 grit, me hearties, makin' sure t' get inside t' tube fins. Aye aye! Avast, me hearties, me proud beauty! T' inside o' t' tube fins were primed and sanded with 400 grit then painted with gloss red. Aye aye! I used Krylon for all me painting. Arrr! After t' paint was dry, arrr, I masked t' inside o' t' tube. I then used some 1" wide tape that I cut down into 1/4" strips t' create t' glue strips. I beveled t' top and bottom t' match the tube fins, me hearties, but I also made t' strips about 1/4" short t' make sure I would nay leave a gap. Well, blow me down! I then primed and painted t' outside o' t' tube fins and t' body gloss black. Avast! I used multiple coats o' thin CA t' seal t' balsa nose cone and sanded down with 400 grit. Well, blow me down! T' nose cone be also painted gloss black. As a finishin' touch, shiver me timbers, I used a Testor's Gloss Yellow Enamel Paint Marker and rimmed t' tube fins. Ya scallywag! I also used t' marker t' paint t' canards and followed that with a red paint marker t' make some deadlights for this evil beast.

Construction Rating: 5 out o' 5

Flight:
T' recommended motors range from an Estes C11 t' AeroTech's E15. Avast, me proud beauty! I went t' me favorite local field where it be 24 degrees with a light coverin' o' snow. Ya scallywag! I prepared some maskin' tape t' use as t' thrust rin' in t' comfort o' me warm house before I left. I used me Estes E size pad with it's 6' x 1/4" rod. Begad! I set up in t' middle o' t' field and prepped a D12-3. Ya scallywag! I tried t' method o' usin' tape around t' motor mount and engine t' secure t' motor that was suggested by t' destructions. Arrr! Some dog barf and parachute (I cheated here and used an existin' 18" Estes chute I have on a snap swivel)in t' other end. Begad! Ya scallywag! An igniter into t' motor, onto t' launch pad, matey, and a countdown from 5. Avast, me proud beauty! Blimey! The rocket left t' launch pad for a beautiful straight flight.

Recovery:
Right before apogee, t' ejection charge went off. Avast! Blimey! T' engine came out one end, shiver me timbers, but fortunately t' nose cone and parachute came out t' other end. Aye aye! Ya scallywag! Blimey! T' parachute did nay open, but t' drag from t' closed parachute and t' separate pieces still had t' rocket comin' down somewhat slowly. Finally, me bucko, about 20' above t' ground t' parachute finally opened. Avast, me proud beauty! Blimey! T' rocket landed standin' up in t' snow without any damage. Avast, me proud beauty! Blimey! For t' second and third flights, me hearties, me hearties, I changed to friction fittin' t' motors. I also put t' parachute in me pocket while I was preppin' everythin' so it would be less stiff. Avast! Arrr! Blimey! My second flight be also a D12-3. Ya scallywag! Blimey! Again, a perfectly straight launch and this time t' engine stayed in and the parachute opened right away. Begad! And then it took a long time t' land with a little longer walk t' recover it. Avast! Ya scallywag! Blimey! I was thinkin' o' tryin' an E11, but t' wind started pickin' up so I used a D12-3 for t' third flight as well. Again a nice straight launch. Ahoy! But with t' stronger wind, matey, matey, t' rocket drifted away some. Aye aye! Blimey! I think an 18" chute is a tad too big for this rocket. I didn't try a fourth flight--my toes were freezing, ya bilge rat, shiver me timbers, shiver me timbers, but I would be tempted t' try a 12" or 14" chute instead o' t' 18" chute supplied with t' kit.

Flight Rating: 4 out o' 5

Summary:
This is a fun rocket with its unique tube fins. Avast! T' rocket goes together simply (after you cut t' fins). Aye aye! Due t' the fins, I would rate this rocket construction complexity as a 3. Begad! Begad! T' quality parts and amusin' destructions made the construction enjoyable. Ahoy! Ya scallywag! Unless you do somethin' t' add a lot o' weight, matey, I would suggest a smaller parachute or else make sure thar are no winds unless you like t' go hiking. Aye aye! Aye aye! I look forward t' buildin' other kits from Pemberton.

Overall Rating: 4 out o' 5

Other Reviews
  • Pemberton Technologies Kraken By Jeff Boldig (March 15, 2008)

    Construction and Finishing: The package was shipped with no damage. Packaging was excellent. The instructions were clear throughout and were injected with a lot of humor. This was a good thing for me because it fits right in with my sense of humor and added to my enjoyment of the kit. Your mileage may vary. The instructions start out with a complete parts list including the fin ...

Flights

Comments:

avatar
K.G. (February 27, 2008)
I am not normally a fan of tube rockets, but when I saw this one I couldn't wait to read a review. Thanks for the information and build tips on a great looking rocket!
avatar
B.C. (March 4, 2008)
About PemTech: I helped Layne edit the Kraken 'destruction manual', and I must say that it is laugh-out-loud funny in many places. ----- About this review: Excellent paint job. The yellow edging on the tube fins makes a great-looking kit look even better.
avatar
J.T. (March 27, 2008)
Is it me or are the tube fins on the kit a lot shorter than the picture on PemTech's website? If you look at the picture, those tube fins should be about 9 inches long (assuming the body tube is 18 inches long). Perhaps the angle of the picture is a bit deceiving? Either way, that won't stop me from getting one. Great job PemTech!
avatar
PEM. Tech. (April 6, 2008)
The answer to the tube fin enigma is : Yes and Yes The photos on the website are of the soon to be released 3" MPR version, which has a slightly different fin to BT ratio and the angle of the rocket in the picture makes the BT appear shorter. We ended up using the MPR version for the pictures because the LPR demo bird died a fiery death brought on by a motor CATO just before the release date.
avatar
A.H. (September 28, 2008)
I used a Estes D-E motor mount with a hook on my rocket it fits good and flew great!

comment Post a Comment