North Coast Rocketry Eliminator

North Coast Rocketry - Eliminator {Kit} (K-45) [1987-]

Contributed by Nick Hills

Manufacturer: North Coast Rocketry
(by Paul Gray - 07/01/02)

Background

T' Eliminator is NCR's highest flyin' rocket. It gains a lot o' altitude for its size, arrr, ya bilge rat, makin' it one o' t' most popular mid power rockets in t' model rocketry world. Aye aye! Well, shiver me timbers, blow me down! T' rocket itself has been made by North Coast Rocketry for many years. Begad! However, me hearties, me bucko, t' design was improved and new features were added when North Coast Rocketry was bought by Estes. Begad! And with Estes' powerful marketing, it has become a very well known rocket. Arrr!

Construction

[Rocket Pic]Dependin' on what you want out of the rocket, me hearties, it can be built one o' two ways. Begad! You can always build it exactly like t' instructions tell you. However, thar be a slight difference in motor selection with this rocket. Aye aye! T' original design is for North Coast F62 and G70 Dark Star motors. Aye aye! Avast, me proud beauty! However, all Dark Star motors are single use, and therefore, are very expensive. Begad! If you want t' use t' cheaper AeroTech RMS motors, the rocket will need some modifications.

First o' all, arrr, NONE o' t' AeroTech motors will fit inside o' any o' the North Coast rockets. Avast, me proud beauty! Blimey! Obviously, they want t' make sure they sell a lot o' Dark Star motors with their rockets. Ahoy! Avast! Blimey! But nay very many people I know have trees in their back yard that grow t' loot needed for t' $12/flight needed for the Dark Star motors. Well, blow me down! Blimey!

If you wish t' use AeroTech motors, shiver me timbers, shiver me timbers, you will need t' replace t' motor tube that comes in t' kit with a LOC/Precision 29 millimeter motor tube. Avast, me proud beauty! T' LOC 29 millimeter motor mount tubin' is sold in lengths o' at least 76 centimeters. You'll need t' cut it down t' a tube t' proper length for t' rocket. Avast, me proud beauty! Then, follow t' instructions for puttin' together t' motor mount. Blimey! But remember that you will need t' sand t' inside diameter o' t' centerin' rings in order to get them t' properly fit onto t' 29 millimeter motor tube.

In addition, a red retainer rin' is supplied in t' kit. This will nay work with AeroTech motors. Ya scallywag! It will nay fit over t' aft gold closure o' the AeroTech reload motors. Begad! Instead, arrr, you will have t' use a retainer o' your choice. Blimey! I have information on a common retainer which I used for me Eliminator in t' segment Motor Retention. Well, blow me down! Blimey!

I also recommend installin' a LOC Modular Baffle Unit. Avast! Aye aye! Waddin' isn't very reliable with larger diameter rockets, arrr, at least t' North Coast waddin' isn't. Ahoy!

T' six decimeter parachute that comes in t' kit is a little too small. Ya scallywag! Begad! I would recommend usin' a seven decimeter parachute. Avast, me proud beauty! Well, shiver me timbers, blow me down!

Other than t' modifications for AeroTech motors, me hearties, me hearties, t' quality o' t' kit is very high. Blimey! Blimey! It features T3 fin attachment for extra strength, me hearties, strong plastic centerin' rings, and an excellent shock cord mount. I recommend havin' a crimpin' tool handy for when you install t' shock cord mount. Aye aye! Blimey! T' shock cord mount is a steel cable which connects via loop t' t' forward centerin' rin' of the motor mount. Then., me hearties, a loop is made on t' other end o' t' cable toward the front o' t' rocket, arrr, which is where you tie your shock cord to. T' loops are held together with metal sleeve connectors. Ahoy! Blimey! Blimey! Blimey! T' sleeve connectors slide onto the cable at t' bottom o' t' loops, arrr, and then crimped t' be held in place. This is a very strong and reliable method o' mountin' t' shock cord, and the entire recovery system. Begad! Blimey!

When assemblin' t' motor mount, shiver me timbers, its easy t' get confused. Blimey! Begad! Go over the instructions several times before you glue t' motor mount together. It especially gets confusin' when you glue t' motor mount inside o' t' rocket. T' instructions say t' put a band o' epoxy inside o' t' body tube at the front o' t' fin slots and then feed t' shock cord through t' tube and slide the motor mount in. Aye aye! Arrr! This isn't t' proper way t' install a motor mount that has a shock cord attached t' it because you are too likely t' get epoxy on the shock cord, me bucko, me bucko, which will weaken it. Well, blow me down! What I suggest is, do nay tie on t' shock cord after you put t' steel cable shock cord mount on t' motor mount. Aye aye! Avast, me proud beauty! Its pretty easy t' avoid gettin' epoxy on t' steel cable since it is stiff and doesn't move all over t' place inside o' t' body tube. Ya scallywag! If a little bit of epoxy gets on it, matey, it shouldn't affect it since it is steel. Blimey! T' loop o' the steel cable where t' shock cord attaches will be near t' front end o' the body tube. Begad! You will be able t' tie t' shock cord on easily. Well, blow me down!

Remember also that t' fins will attach t' notches in t' centerin' rings. When you glue t' motor mount in, me bucko, make sure that t' notches are aligned with the fin slots, and test fit t' fins while t' epoxy is settin' t' ensure proper alignment. Avast!

T' constant warpin' o' t' birch plywood fins drove me nuts. Take a look at your fins, ya bilge rat, me hearties, and if they're very warped, boil some water on t' stove. Begad! Begad! Hold each fin in t' steam makin' sure that all areas o' t' fin are bein' steamed. Ya scallywag! Steam the fins for a minute, and then stack them under heavy books for a day or two. This won't get them totally flat, but it will get them flat enough so that they won't make t' rocket unstable or squirrelly. Ahoy! T' only thin' that t' rocket could possibly do in flight is roll, but rollin' can add stability. Ya scallywag!

Flight

T' Eliminator is an outstandin' flyer. Aye aye! T' Eliminator is a very stable rocket that can reach altitudes up t' nearly 457.2 meters. Ahoy! It flies well on F62 Dark Star motors, shiver me timbers, but is spectacular t' watch on AeroTech G33 Black Jack and G64 White Lightnin' motors. Avast, me proud beauty! It refuses t' weathercock, and its lift offs are slow and realistic. Avast! Arrr!

Grades

Design: A 
Construction: C 
Flight: A+ 

As you can tell, construction isn't very easy. Arrr! Aye aye! This rocket is a good one if you're tired o' t' same old AeroTech and LOC rockets every time, arrr, shiver me timbers, me bucko, but like all mid power rockets, matey, it is nay recommended for beginners. Aye aye! I also do nay recommend it as a first mid power rocket. Ahoy! Begad! I only recommend it if you have at least a year of experience with mid power rockets.



(Contributed - by Dave Reynolds) 

Note: For more Eliminator pictures, shiver me timbers, visit Dave's site.

[Rocket Pic]T' Eliminator kit is a kit I highly recommend. It has t' Estes glossy design packagin' and t' design o' t' rocket is sleek and easy t' build. Ya scallywag! Aye aye! This is a good kit t' start out with and will get on you on the way t' high power in good kit design. Well, blow me down! T' only problem with this kit is the slightly smaller engine tube. Avast, me proud beauty! Begad! It is designed for North Coast Rocketry's 'Dark Star' engines, but will except a 29mm reloadable casing. Anyway, arrr, if you are goin' into high power you will save loot by usin' reloadables in t' first place. Because o' t' motor tube difference I give this kit a 90% rating. Ya scallywag! It would get a 100% if it had a 29mm tube instead o' 28.987mm. Begad! Ya scallywag! I think this was done so Estes would be sure o' t' success o' their "Dark Star' engines. However t' 'Dark Star' engines are excellent motors, t' only problem t' 'G' motors are nay yet available. Ya scallywag! Blimey! Well, look at t' pictures and see this rocket in flight with t' 'Dark Star' F62-6 motor, ya bilge rat, they do have an impressive black smoke trial.

T' Eliminator Kit

Estes is serious about mid-high power in this kit. Arrr! T' heavy slotted body tube, the thick slotted engine mount rings, and t' steel cable gorilla shock cord mount are designed with 'heavy duty' in mind. Ya scallywag! I liked t' laser cut plywood fins however, shiver me timbers, I recommend reinforcin' t' fins with fiberglass & epoxy if goin' t' fly on an H reloadable engine. This kit has a 24" nylon parachute and a extra long heavy shock cord. T' decal sheets are cool, one chrome trim and a Eliminator name decal. This kit should be put together with epoxy only! Use 15 minute epoxy t' mount root edge o' fins and t' glue on centerin' rings to engine tube. Begad! Use 30 minute epoxy t' make fillets for fins and engine mount tube, me bucko, shiver me timbers, and for fiberglassin' fins surfaces use 2 hour epoxy. Begad! t' engine tube is just slightly smaller than 29mm. Ya scallywag! Only 29mm reloadables and North Coast's Dark Star engines will fit. Arrr! you can use a LOC/Precision 29 mm tube, with only minimal sandin' t' engine mount rings. 

[Rocket Pic]The 'Eliminator' in Flight

T' Eliminator's first flight be at t' 'Danville 97'high power meet on October 25, 1997. Avast, me proud beauty! It flew on a F62-6 Dark Star motor and flew perfectly straight on a very windy day. Aye aye! T' altitude be about 1100 feet. perfect chute deployment drifted about 1/2 mile. Begad! I was goin' t' try me level one certification with this rocket with a H reload but because o' t' high winds I decided t' wait. Begad! This rocket is definitely a winner! I highly recommend this kit for sport flying. Aye aye! Well, blow me down! It is a straight flyer!
Other Reviews
  • North Coast Rocketry Eliminator (Mod) By Gary Sinclair (December 1, 2010)

    Kevlar sock reinforcement, payload bay created, fully slotted body tube for external fin can assembly. Modified to take Aerotech 29mm reloads up to an I200.   Modifications: The list of modifications for this kit included: (1) Created an 11.8" payload bay out of the original long body tube. (2) Airframe has been reinforced using a Giant Leap Kevlar Sock with West Systems ...

  • North Coast Rocketry Eliminator By Nick Hills

    Brief: This is a simple 3 fin and a nose cone rocket. It is straight forward and easy to build. It would make a fairly good first mid-power rocket. Construction: Upon opening the box everything looked to be in good shape, but when I laid the plywood fins down on a table, I noticed that they were warped. So they were put under a few hundred pounds of pellet bags for a few days and they ...

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