Krãken.
A Scaled Down Version of the King.
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Kit Specifications:
Skill Level 3: Average Skills Needed
Length: 22" (56 cm)
Diameter: 1.6" (42 mm)
Weight (without motor): 4.5 oz (128 gm)
Recovery: 16" plastic parachute
ORDER This Kit NOW! Just click on the "Own It Today" button below.
Pemberton Technologies Krãken Rocket Kit
P/N: 07571
Price: $25.00
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Recommended Motors: See Chart Below.
Krãken Rocket Kit. Predicted Altitude (From RockSim)
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Motor
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Manufacturer
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Altitude (feet/meters)
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Comments
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C6-3
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Estes/Quest
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———
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Do not use. Rocksim predicts you would need a 105-inch launch rod to achieve stability!
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Estes
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333/102
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A good choice, but launch straight up because the delay is a little long.
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Estes
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775/236
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We recommend this motor for your first flight. You get good altitude, you can launch in a medium sized field, and the delay puts the Kraken right at apogee for ejection.
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Aerotech Single Use
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920/280
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Apogee Single Use
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922/281
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E9-6
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Estes
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1270/387
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Try this motor for very high flights. Use only at a large field.
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Aerotech Single Use
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1664/507
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Thundrous blue flame. Try this motor before flying any of the larger ones listed here. It may be hard to see and recover the rocket with larger motors. This is also a good choice for windier conditions. It is very quick off the pad, and ejection occurs a little early, which is good if the rocket noses into the wind.
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Aerotech Reloadable
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1669/509
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Blue Thunder.
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Aerotech Reloadable
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1720/524
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Loud White Lightning. Delay a bit long by one second.
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Aerotech Single Use
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1779/542
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Loud roar. White flame.
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Aerotech Reloadable
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1830/558
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Lots of black, billowing smoke.
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Aerotech Reloadable
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1951/595
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Explodes off the pad. Seriously, if you're going to use this motor, epoxy the tube fins on. Delay a bit long by one second.
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Aerotech Reloadable
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1957/596
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Loudest motor choice for this rocket. White Lightning.
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Apogee Single Use
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1975/602
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Once again, Apogee's Medalist E6 blows away all other E motors. Is it any wonder that this is the choice for serious competition?
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Aerotech Single Use
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2177/664
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Blue thunder. Highest altitude, and epoxy your fins on, because this baby will be crusin': 458 miles per hour!
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See the video below for help in selecting rocket motors. Rocket motors are sold separately from the kit. If you are unsure which one to pick, start with the one recommended for the First Flight, and then another for a more impressive launch. Most motors listed in this chart are available through Apogee Components. For the many other motors that are not listed here, download the RockSim file to see if it will work in this rocket kit. See also Technical Publication #28 for guidance on selecting appropriate rocket engines other than those listed in this chart. If you don't already have Technincal Publication #28, give us a call, and we'll be happy to let you download it free (you have to ask though). |
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Pemberton Technologies Krãken sculpted tube fin rocket.
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A Big Creature from Ancient Sea Lore
The Pem-Tech Krãken (pronounced krã'-kin), named for the dark, sinister creature of ancient sea lore, is a one-of-a-kind sport flier featuring Pemberton's unique, sculpted tube-fin design. She is as much a fantastic flying machine as she is a work of art, created by you. Unlike traditional, and boring, tube fins the Krãken sports a canted leading edge tube fin with a short full tube that has been reported to be 30% more stable than square cut tube fins. Large, long and lean with sexy flowing lines, the Krãken will be sure to turn heads at your next launch.
About half the size of the monstrous King Kraken, this scaled-down version uses 24mm instead of 38mm, and allows you to launch in much smaller fields. Because you can use up to F sized engines, the Krãken includes beefy 1/4" launch lugs.
Get ready to spend a few days on this kit. The builder cuts those cool fins using a hobby knife with a brand new, sharp blade. It's not hard, but it takes patience. We know a lot of you will want to get right to the flying part, and that's great; if you assemble it, do some sanding and filling, and then paint it, the kit will look spectacular and fly straight. Your Krãken will impress every other flyer on the field. Pemberton recommends building this way in the "destructions".
For our display rocket (see photo at right) I did all the sanding, filling and final paint before assembly, then added the tube fins. This results in a gorgeous rocket, but if you elect to do the same, think of this as a Skill Level 4 kit instead of 3. When you sand and fill the tube fins inside and out, the resulting showpiece leaves fellow fliers slack-jawed, "Holy Cow... how in the world did you do that?" Some of the guys we showed the Krãken to at our last launch just said, "Wow!"
This futuristic single-staged denizen of deep space is so cool it's spooky. That doesn't mean it's hard to assemble. It is actually an easy to build kit. For example, the destruction step you may spend the most time on is cutting the tube fins and doing the prep work for painting. The tube cutting destructions are very clear, and, believe it or not (spoiler warning), it's a straight cut, created with a flexible straightedge. Pemberton reveals a cool tube painting trick, too, and you don't even have to do any masking. You'll find yourself flying this model after just a couple days of pleasurable build time.
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Black Powder Motors are Perfect for this Kit
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This kit is a great introduction into the world of high power rocketry. You can build it and fly it on low-cost Estes black powder motors, but then you can graduate into composite propellant and/or reloadable casings. The range of motors available for this kit is astounding, and because it's a rear-bulkhead retention design, you're not limited to short motors.
I love this kit! It's big, distinctive, mean-looking, and sleek.
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Pemberton does something creative with the visual impact of this kit. Layne calls the canards on the nose cone "squidly". They do have a decisively squidish look, and they give the kit that extra detail that defines it as the Krãken. The canards are surface mount balsa, and you cut them out from a pattern from sheet stock (old school), so they are easy to work with.
The kit includes nose weight for stability.
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Why is this a Skill Level 3 Rocket?
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There are only three steps in the rocket that require more than basic building skills. These are cutting the tube fins, cutting the canards from balsa stock, and some extra time sanding and filling. You need to test the Krãken with the heaviest motor you plan to use, and may need to add nose weight until it's stable. You probably won't need to add any nose weight, but check stability to make sure. It does take a little extra care and patience to use the rear bulkhead method of motor retention, too. Otherwise, construction is straightforward.
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Who Is Pemberton Technologies?
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Flash back with me, if you will, to a time when handsome, brave, wide shouldered, square jawed, homogenized white guys in jump suits made the universe safe for all mankind. Heroes such as Captain Video, Flash Gordon, Tom Corbett and Buzz Corry came to the rescue every week, thrashing bad guys and thrilling youngsters across the land.
From out of that Wonder Bread world of the 50´s, Pem-Tech brings you the coolest science fiction spaceships of all time: Sleek, silver, beauties like the Krãken and the glorious golden hotrods like Bucky Jones Space Cadet.
Layne Pemberton is famous for his "destructions". The humor infects everything from motor selection to your household pets. Trust us, they're fun. The photos could use some upgrades to good quality line diagrams to improve legibility, and the text is overly expansive, but the destructions are otherwise well done.
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Beautiful Balsa Nose Cone - This ogive nose cone is built for speed. The balsa is easy to sand to a perfectly smooth finish. The included canards are cut from sheet balsa and surface mounted on the nose cone. The resulting "squidly" style is distinctive and cool.
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Premium Body Tubes - These body tubes are quality pieces, with small spirals so they finish quickly. They're thin walled, but tough, for a lighter weight rocket that flies higher and lasts a long time. One is used for the main body, another for the 4 tube fins.
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Beefy Motor Mount - No cheesy paper centering rings on a Pemberton kit! The rings are made of heavy paperboard that's two or three times thicker than you see on similar kits from the large manufacturers. They last longer and are laser cut. When I built ours, I didn't have to sand them at all because they fit perfectly.
Because you can use up to F sized engines, the Krãken includes 1/4" launch lugs, too.
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A Great Parachute - 16-inch diameter plastic parachute, includes self-adhesive reinforcement rings and premium shroud lines. When this parachute blossoms in the clear blue sky, you'll be reminded again why rocketry is so fun.
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Tools needed to assemble this rocket kit:
- Pencil
- Ruler
- Masking Tape
- Hobby Knife
- Finishing Supplies like paint and sandpaper.
To Launch This Rocket Kit, You'll Also Need:
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Frequently Asked Questions about the Pemberton Technologies Krãken kit:
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Q. What launch pad should I use to launch this rocket kit?
- A. Since this rocket can use large engines, you'll need bigger launch pad if you're using E's and F's. We offer a couple of choices: the Aerotech Mantis Launch Pad, and the Estes Porta Pad-E.
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Q. How is the engine was held in on the Krãken?
- A. This rocket uses a 24mm motor, so tape will suffice to hold it in. See our motor retention information page for pictures and video.
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Q. I need help selecting motors. What should I do?
- A. Watch this YouTube video.
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Other Optional Accessories That Work Great With This Kit:
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Rocket Motors - This is a reminder that this kit does not come with rocket motors. See the chart at the top of this page to see which motors will work in this particular rocket kit.
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Epoxy Clay - While it has a 1,001 uses around the house, it works great on rockets to make super-strong fillets where the fins attach to the rocket. Better than regular epoxy because it stays in place and doesn't ooze all over the rocket. So you can get perfect fillets on all your fins, without having to do them one at a time.
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Piston Launchers - Get another 5% increase in altitude just by launching from a piston launcher! A piston launcher converts the hot exhaust gases from the rocket engine into high-pressure that kicks the rocket into the air at a faster velocity. Two sizes available for either 18mm or 24mm rocket engines.
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To see how the Krãken rocket looks and performs with in each motor configuration, download rocket design file now (click here). This file can be opened with the FREE demo version of RockSim (click here). This kit is included as one of the sample designs that comes with the demo software. Both Windows and Macintosh versions are available.
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What is a RockSim Design file? The RockSim software gives you a lot of information about the flight characteristics of this rocket: how high, how fast, where it will land, how will it react to wind, etc. The "design file" is intended to save you time. All the parameters (size, shape, weight, fin design, etc.) of this rocket have already been entered into the RockSim program, and saved as an electronic database file. You can just open it up in your copy of RockSim and start loading different rocket motors to run launch simulations. It's fun and educational to see the rocket zoom skyward, even before you built it. For more information about RockSim,
click here.
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What is expected when you launch your model rocket?
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Are you new to rocketry? Do you think you know what happens when you launch your rocket? Now you can learn about the events that occur as your rocket is launched into the air. So when you launch your rocket, you'll be prepared and you'll be able to show off your knowledge to observers watching your rocket. This article also gives you links to other references that will give you even more background information about rocketry, so you can become a true rocket scientist and expert.
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"By the way, the Krãken was super fast off the pad and flew amazingly straight up - a great rocket. I think it might be time to step up to the King Krãken." -- Keith Borgschatz
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"I want to let you fine folks at Apogee know that I doubt I will be doing any business with other rocketry sites than you. Your products are all top notch, your choice of kit vendors is about as wide as anyone out there. Thank you in advance for going the extra mile when it comes to customer service, product knowledge, and plain old HONESTY..." — Steve Hill
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Kevlar® is a registered trademark of E.I. du Pont de Nemours and Company for its brand of aramid fiber. Only DuPont makes KEVLAR®
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Shipping and Handling Fees:
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To estimate the shipping charges, please see our shipping information page. This page also explains how items are shipped, as well as offering you additional shipping options.
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