RocketReviews.com - Estes - Graduator to Killer Keller

Manufacturer: Estes

(by Brett Keller)

Brief:
The "Keller", now the "Killer Keller" began as a LOC/Precision Graduator and has evolved into a completely different rocket.

Rocket Pic Construction:

3 2.6" body tubes
2 tube couplers
bulkhead
38mm motor mount
2 centering rings
4 fiberglassed plywood fins
2 launch lugs
LOC nose cone
24 or 36" parachute (depending on flight)
shock cord
various hardware

The rocket was originally a LOC Graduator. Due to poor construction techniques (it was my first mid/high power rocket) it had a number of poor flights and sustained a lot of damage. I cut off the bottom 7-8" of the rocket, and added 3 feet of tubing, a 38mm motor mount, and 4 fiberglassed fins. It has since proven to be a very reliable rocket.

Rocket Launch Flight:
The first few flights were all less then nominal (see launch reports), but finally after all the upgrades the rocket flies well. On an H123 it goes about 2000-2500 feet and descends on a 24" parachute fairly close. The 3' long payload section allows for some neat static payloads.

Summary:
This is one of my favorite rockets, especially since it bears my name. It is a great sport flyer and turns in some majestic-looking flights on H motors, and should fly fine on I's.

Other:
The original flaw in the Keller was that low-quality epoxy mixing techniques were used. If you are going to get involved with epoxy in your next project, ask a local with experience to show you how to work it. Otherwise, read all you can on the Internet first.

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