LOC/Precision Graduator

LOC/Precision - Graduator {Kit} (PK-16) [1986-]

Contributed by Mark Trotter

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar_border
Diameter: 2.63 inches
Length: 40.00 inches
Manufacturer: LOC/Precision
(by Mark Trotter) 

[Picture]This is a great kit t' get you into the more advanced, me bucko, mid-power rocket kits, but I would still recommend gettin' a novice kit first. Ya scallywag! T' Graduator has t' great feature o' through-the-wall tubin' which decreases t' time and effort for you. Arrr! It also comes with t' LOC MMA-1 motor adapter t' fly it on 24mm motors. Avast, shiver me timbers, me proud beauty! T' only problem, ya bilge rat, ya bilge rat, thar be no type o' "motor block" in t' mount. Avast, me proud beauty! It's still a great kit t' build and fly. Begad! Since t' kit has thru-the-wall tubin' all that needs t' be done, me bucko, once the fins have be n epoxied in place, is t' apply an epoxy fillet. Begad! Ya scallywag! Also, shiver me timbers, I did not put a sealer on t' fins like t' instructions suggested, ya bilge rat, matey, but it turns out that I really needed to, as t' grain on t' plywood shows. Make sure you sand the entire rocket before paintin' as well. Well, blow me down! [Editors Note] Before gluin' the motor mount into place a positive motor retention system could be installed. Friction fitting, ya bilge rat, shiver me timbers, with tape, shiver me timbers, is a practiced method, matey, ya bilge rat, but is a little scary with those expensive RMS casings.


LOC - Graduator  - by Moira Jean Whitlock

[Rocket Pic]Brief:   Single staged, three-finned rocket for 29mm engines. Begad! Blimey! I think that it is meant as a first rocket for middle power. Ya scallywag! It turned out t' be mine as well. Aye aye! Avast!

Construction: Everythin' be there, nothin' defective or broken. Ya scallywag! The nose cone and body tube are standard LOC parts, me hearties, shiver me timbers, with t' nose bein' hollow sturdy plastic, and t' body tube spiral wound kraft paper glassined on the surface. Blimey! Well, blow me down! It be also pre-slotted t' allow t' plywood precut fins which came with tabs that matched these slots t' fit in. Begad! Two centerin' rings, shiver me timbers, plywood, were provided, and can be placed t' meet t' fin tabs and reinforce t' joint. And these rings center t' spiral wound paper 29mm motor mount tube. Ahoy! T' kit came with a red, ya bilge rat, 18 inch nylon chute with 8 nylon cord shroud lines. Ahoy! Begad! T' shock cord is 5 feet o' flat white elastic 1/4 inch wide, mounted t' a tough possibly nylon/Keelhaul®©™® 6-inch cord that is made into a loop and is anchored t' t' folded paper shock cord mount inside t' body tube. Ya scallywag! Ahoy! For this model, I glassed over the affixed mount with epoxy. So far, me hearties, no zipperin' has occurred. Begad! T' launch lug is spiral wound paper, and is 6 inches long and accepts 3/8 inch rods.

Finishing: There weren't decals, arrr, me bucko, so after I spray painted t' entire rocket with matte fluorescent orange sign paint, shiver me timbers, I wrote the name, "Graduator" in blue up t' body tube in fabric paint.  Surprisingly, me bucko, me hearties, it has stayed on perfectly. Blimey! In t' middle o' t' body tube, me hearties, I put a 4-inch wide band o' adhesive silver mylar t' enhance visibility.  I also put a similar band o' orange mylar at t' top o' t' body tube t' prevent paint chippin' at t' top, shiver me timbers, which happens a lot when I fly rockets as often as this one.

I used Micro Fill model filler t' fill t' spirals. Begad! Aye aye! It's white putty that is spreadable with fingertips and dries in a few hours at room temperature. Begad! And it's sandable. And it's sandable. Maybe I should have roughened it up a little to let t' primer adhere better and so t' main coat would have held better. This stuff does fill cracks and transitions and makes a surface more aerodynamic. 

Construction Rating: 4 ½ out o' 5

Flight: It's recommended t' use 29mm G Aerotech motors.  So far, I have tried t' G35, G40, arrr, and G80, shiver me timbers, all with a 7 second delay.  All work great. Well, blow me down! This battered rocket has lived two years and has flown easily 16 times. It's easy t' prep, shiver me timbers, arrr, with five papers bein' enough wadding, me bucko, matey, or enough worm bed waddin' t' fill t' tube t' one inch.  T' chute is unscorched and unfrayed, but I put it in a red rocket for color matchin' and made this one a similar sized one from blaze orange rip stop nylon t' match its color scheme. T' only wear t' rocket has is its paint. Well, blow me down! Since this rocket was one o' my first in higher power, shiver me timbers, I used putty t' smoothen t' fin t' body joints, but since this stuff can flex, ya bilge rat, t' paint over it has chipped and has required redoing.  Maybe next time I'll use primer and automotive paint. Begad!

I read that other reviewers would have wanted an engine block.  I have mixed feelings here. First, shiver me timbers, I'll tell an embarrassin' story.  When I didn't tape me G80 in well enough, arrr, it kicked up and out and left t' rocket behind. This was in front o' a lot o' guys whom I would prefer t' have impressed. Begad! Begad! Blimey! An engine block cured that, me hearties, but will prevent me later use o' longer motors. Blimey! Arrr! Blimey! I'll just have t' buy another Graduator for that! Blimey!

Recovery: Just right, no fin loss, shiver me timbers, me bucko, no scorches on the chute. Avast! Begad! Blimey! T' rocket is a little battered, arrr, but intact and still flying. Avast! Aye aye! Blimey!

Flight Rating: 5 out o' 5

Summary: Easy t' build, me bucko, reliable. Blimey! Easy t' build, shiver me timbers, me hearties, shiver me timbers, reliable. Durable.  Very possibly modifiable for H power if fiberglassed. Begad! Blimey! I just might do that. Ya scallywag!

Overall Rating: 4 ½ out o' 5

Other Reviews
  • LOC/Precision Graduator By Todd Harrison

    LOC Graduator review is provided courtesy of: This rocket is a popular LOC kit for people new to composite motors. I liked the looks of the rocket and was in need for a new kit in that power range (D-G). The Graduator came promptly and packed well, however, the shipping company had still managed to kink the body tube. I contacted Barry, the new owner of LOC, and he shipped out another tube ...

  • LOC/Precision Graduator By John Hogan

    Brief The Graduator is an excellent rocket for those wishing to get into mid/high powered flight Construction The tubing, fins and everything were of excellent quality. The instructions were brief (few illustrations), but adequate. The preslotted tubing made fin installation straightforward, and all parts fit together nicely. I highly recommend reinforcing the fins so that they are ...

Flights

Comments:

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D.H. (September 1, 1999)
My LOC Graduator is now 7 years old and still flying. It has flown on engines from D12-3 (frighteningly low altitude at ejection) to G40-7 (WOW!!!!). It has had its share of abuse from over 30 launches and is still going strong. The only change I would make is to have the fins go all the way to the motot mount. Easy to construct and fly. The perfect first mid power rocket.
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R.T. (November 1, 1999)
In short, the Graduator was my first big rocket, and still my favorite. The Rocket can really get up there, my best launches were on an F101T-5 and a G80T-10. I have put it up on a D12-3, and almost killed the LCO, or at least scared him! I have found that one can use a 12' chute for the G's and H's, but make sure the fins are very strong.
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J.C. (February 1, 2000)
Great kit. I had a good time building it. I added a motor Retention system, I set it up to handle the longest motor I had, (29mm Areotech RMS case). I also was too scared to use the wall mounted shock cord mount.(upon reflection I'm sure that the 6ft plus shock cord would absorb most anything, thus preventing any potential "zippering"). I made my own mount using the same 1/4" plywood that the fins are made of. I shaped it to fit, drilled holes in it and added an eye bolt. I do wish this kit had fins that went all the way to the motor mount tube. But they seem strong enough to me. I felt it was rather deceptive not to mention that the Loc/Precision kits don't come with decals. I made my own using colored self-adhesive sheets sold at hobby shops that sell model airplanes. They're great and come in all kinds of colors. Overall I'll give this kit a 3.5 rating out of 5. It would need several things to get a 5. 1.) motor retention system. 2.) Center-ring mounted shock cord. 3.)through the wall to engine tube fins. I will nevertheless still buy more of the Loc/Precision kits. If, however, let's say that Areotech made all the same rockets that Loc/Precision did, I'd buy the Areotech every time, even for a 25% price premium.
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G.B. (May 1, 2000)
Adding an engine block to the kit would limit your choice of motors. All you have to do is wrap 1/2-inch electrical tape (takes heat better than masking tape) on the aft end of the motor until it becomes slightly greater in diameter than the motor tube. That keeps it from kicking forward. A simple way to keep it from kicking aft upon ejection that I used is to install a pair of blind nuts (T-nuts) in the aft ring that take No. 6 screws. Wire is attached to one screw, wrapped around the engine nozzle, and secured to the other screw. Simple, cheap and effective. But you have to install the nuts before you install the engine mount into the body tube. And be sure to epoxy the nuts in place.
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K.W. (June 1, 2000)
I'll agree with the other posters that the Graduator is a great kit to get started with in mid power. I chose it myself based on some suggestions from other folks and I'm glad I did. Construction is straight forward. Luckily I had heard about Kaplow Klips before I started and incorporated them in the rear centering ring. I don't know why LOC doesn't include them in the kit or at least suggest their use. The parts are cheap enough and available at any hardware store. I also built in a parachute compartment in the forward end of the body tube so I wouldm't have to use wadding. This was a section of 1 3/4" diameter mailing tube, long enough to hold the supplied 18" chute and shock cord. I epoxied a spruce bulkhead at the rear and coated it with epoxy. I centered in the body tube with three strips of 3/16" thick spruce. The ends of the LOC shock cord mounting loop were epoxied into the spacer fillets and the whole assembly was epoxied into the body tube far enough in to let the nose cone slip inside. I flew it about 8 times (on E16s, F20s, F22s, F52s and a G33) like this until I had a bonus delay on an E16-4 and it lawn darted. I rebuilt it with a new section of LOC body tube and incorporated anti-zipper design into the coupler. (This concept was covered in Sport Rocketry a while back) This is essentially a tube coupler with a bulkhead on each end. There are holes drilled in the bulkheads so that the holes don't line up. It acts as an ejection baffle. I put an eyebolt in the top coupler and the chute goes in the forward section of tube. So far I've not had any recovery problems or chute damage. It's also survived a lake landing. It is now too heavy to fly on E's. My favorite motor for this bird is the F20 and F23 Econojets. I recommend this kit for a first mid power bird. It flies on a variety of motors and has the flexibility of a 29mm motor tube and an adapter that comes with the kit.
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J.S. (January 1, 2001)
Graduator is a great first rocket for mid-power. It's inexpensive, forgiving, and fairly stout. It would be nice if LOC would do something about motor retention, since a mid-power newbie tends to learn about such things the hard way. I do wish the fin tabs continued to the motor mount. Even with the TTW fin mounting, I knocked fins loose on two different occasions. The parachute choice seems to assume a small field. But you'd better not be in a small field if you launch your Graduator on a G motor! If anybody finds mine, please let me know. @#$%! trees.
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S.B. (January 1, 2001)
I agree with Mark. The Graduator is a simple kit to build, with enough room (barely) in the rear centering ring for a retention system. I didn't put one in and haven't had trouble with friction fitting motors. I even friction fit a H-128 for my level one flight when my cert 1 rocket died on it's test flight, and everything worked fine. A fun rocket to build and fly!
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M.R (January 1, 2001)
I really enjoyed building my Graduator. I agree that it's a good first rocket to get into mid-power rocketry. My kit went together really well, but I wish I would have thought about motor retention before assembling it. I retrofitted mine with something similar to a "Kaplow Klip" which works great for both single use and RMS motors. I used a sealer on the fins before painting, and didn't get any grain, but the appearance of the finish came out noticeably different from the body tube.  I finished mine with a uniform color of Pactra Candy Purple, and call it the "Purple Propellant Eater". I've flown F and G reloads, but I've found that the suggested 10 second delay is a little too long. All in all, the Graduator is a great rocket to build and fly!
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J.S. (August 1, 2001)
The rocket is very stable in flight. I used a H90 and flew great. The only thing that should be changed is the through the wall fin design. It should be all the way through to the motor mount, so it has more strength. One could also put dowels inside the airframe and epoxy them to the fins. This would be better than nothing.
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P.V. (December 15, 2001)
I bought this rocket from DiscountHobbyCenter.com and I got the new version with fins that go all the way to the motor mount. It was a very easy kit to build, it flies great too. My favorite motors for it are F23 and G38 BlackMax motors.
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G.B. (August 30, 2002)
Many posting opinions here on the Graduator have wished for through the wall to the motor mount fin tabs. According to the LOC Web site, the kit now includes that! It's refreshing to have a company respond to consumers' calls for improvement. Now if only Estes would do something about those lousy shock cords ...
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J.S. (April 26, 2003)
I highly recommend the Graduator. It's attractive, very stable, and reasonably easy to build. The parts are all of top quality. I made a few modifications to the kit: I added a thrust ring and a Bourne Again Rocketry Motor Anchor (since I'm uncomfortable with the idea of using tape to retain the motor in a rocket as large as this one). I also skipped the LOC shock cord mount and instead mounted the shock cord with a piece of Kevlar® attached to the forward centering ring. Another good motor for the Graduator is the F20-4 Econojet. Compared to those of an AeroTech or Estes kit, the instructions are terse and have few illustrations. If you are completely new to mid-power, it might be a good idea to build an AeroTech rocket or two before you try a LOC/Precision kit.
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(June 16, 2004)
To avoid being ripped off or scammed from DicountHobbyCenter.com, check the Better Business Bureau to see at least 15 COMPLAINTS against this firm. We are seeking legal action ourselves. Our research indicates disturbing findings. Check it out for yourself if you don't believe us. After we get through with this firm, there will not be any hobbies to buy from them and you can rest safe. Caveat Emptor Greetings to all.
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B.P (March 18, 2008)
This was my level 1 rocket, flew great on an H180 medium. has also flown on an H128, H97. H128 was probably my favorite not too high. The only problem was that the rocket would always land on one fin first. finally broke off edge. this would probably be a good place for some fiberglass reinforcement.

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