Construction Rating: | starstarstarstar_borderstar_border |
Flight Rating: | starstarstarstarstar_border |
Overall Rating: | starstarstarstarstar_border |
Manufacturer: | North Coast Rocketry |
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 came out
nearly perfect. The body tube was a 'normal' tube for mid-power rockets, just
cardboard. It had a bright red 24" chute with it too. When building your
own, I would recommend putting some LOC 29mm motor tubing in the kit to replace
the NCR one, since you can use Aerotech reload and single use motors. The
instructions were easy to follow, fairly well written. In some parts you might
have to read them over a few times. Building was extremely easy since there
were no hard parts to building this rocket. I used 5 and 30 minute epoxy
through out construction. Also you will want to put some t-nuts in the aft
centering ring since the NCR gorilla retainer will not work on any Aerotech
reloads or and Kosdon motors. One bad point to the rocket was the 1/8",
3-ply plywood fins. Since there are only 3 plys, it makes the fins very weak. I
think that they need to be glassed. Some 2 ounce fiberglass cloth will work
fin. I learned my lesson, read on to find out how. Just a note, most other
mid-power kit manufactures use 1/8", 5-ply plywood for their fins, which
make them much sturdier! One other thing is, it is very important to get the
centering rings lined up, if you don't then your fins will not fit into the
slots in the body tube.
Finishing:
Finishing was VERY easy! I just gave it 2 coats of primer and painted it as
they showed on the box with Krylon gloss white spray paint and Krylon True Blue
spray paint. The decals were nice, I would recommend getting some water and a
little soap in a dish to put them on since it makes them much easier to put on
as you can move them around.
Construction Rating: 3 out of 5
Flight:
For my first flight I choose the 120 newton second Kosdon G40-7 c-slot motor. I
just put some fiberglass insulation in and packed the chute, then put the motor
in and put the retaining washer on and it was ready. On ignition the Kosdon G40
came to life and it went up nice a straight! The G40 is a very LOUD motor,
especially for a G motor. The 24" chute came right out at apogee. But on
landing it broke a fin due to the weak 3 ply ply-wood. This was a easy fix. I
have put a 28" chute in it and have since then flown it on a Aerotech
G35-4 for a really nice boost, but the delay was a little short. Rocket landed
safely under a 28" chute.
Recovery:
The shock cord was 10' of 1/2" flat elastic, this was attached to the
rocket by a steel cable that went through a centering ring, this is very
strong. For the first flight I used a 24" chute, which was too small and
resulted in a broken fin, for the next flight I used a 28" chute which was
just fine.
Flight Rating: 4 out of 5
Summary:
The Eliminator overall is a great rocket. The only down side to the rocket is
the 3-ply plywood fins and the 24" chute. IF it was not for that, then it
would have gotten a 5 over all.
Overall Rating: 4 out of 5
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 ...
(by Paul Gray - 07/01/02) Background The Eliminator is NCR's highest flying rocket. It gains a lot of altitude for its size, making it one of the most popular mid power rockets in the model rocketry world. The rocket itself has been made by North Coast Rocketry for many years. However, the design was improved and new features were added when North Coast Rocketry was bought by Estes. ...
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