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REV 2.4 - Mon Nov 8 00:05:18 2010

Scratch
Los Alamos Chicken
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SPECS: 24" x 8" - 1.8 oz
ROCKSIM FILE: MISSING - please submit here
SpaceCAD FILE: MISSING - please submit here
REC'D MOTORS: MISSING - please submit here

(Contributed - by Jeff Lane [Who's Who Page] - 04/19/08) Los Alamos Chick Portrait

Brief:
A large plastic Easter egg with nuclear waste-colored legs bustin' out. Since it's from Los Alamos, it's a mutant with three legs.

Construction:
The parts include:

  • 1 8" diameter Easter egg ($1 post-Easter sale at Hobby Town).
  • 1 2" diameter Christmas wrapping paper tube
  • 1 29mm thin-wall Apogee motor tube
  • 2 foamcore centering rings
  • 1 motor clip
  • Kevlar® and elastic shock cord
  • 1/4" plywood main legs
  • 1/8" plywood toes

It took about 5 hours to build. The plywood was cut out with a power jigsaw, then two coats of Giant Leap Megafoam was poured on each side of the plywood. The "overfoam" was cut off all around using the plywood as a guide, then an orbital power sander was used to fine-shape the foam. Some half-cured Megafoam was dribbled around the joints where the two side "toes" are glued on. This serves as good reinforcement and also makes for a yummy "guts" look. The 29mm motor mount is a standard build, with Kevlar® shock cord. The legs were glued to the 2" scrap Christmas paper core using wood glue, which was the hardest part of the build. Slots were cut in the bottom of the plastic egg with a Dremel and the leg-and-tube assembly was slid in and glued using Gorilla Glue. Each time it has landed so far, a leg needs to be glued back on.

(Scratch) Los Alamos Chicken(Scratch) Los Alamos Chicken

(Scratch) Los Alamos Chicken(Scratch) Los Alamos Chicken

(Scratch) Los Alamos ChickenFlight and Recovery:
The first flight was on an E23-2, but it CATOed and ejected the chute on the pad. It wasn't big enough anyway, so second flight was on a G71-4 Redline, which worked fine. Minimum recommended motor is an F72-2. Recovery system space limits motors to fairly short ones. An H128 wouldn't fit unless you wanted "featherweight" recovery.

Prep is normal. Wadding and chute. Tight fit required changing elastic after second flight from scorching.

Flight Path is a lazy corkscrew (see video). Recovery is good on a 54-inch chute.

Summary:
The good: it's fun. One comment I especially liked: "It looks like something from Heavy Metal"

The bad: it's heavy and draggy, so it doesn't get much altitude.


Videos

[Submit your Opinion]

GUEST's OPINION:
06/08 - "OK, OK. Here's a flight on a G74 Mojave Green (6/14 flight). That 4-second delay seems awfully long. In fact, scrambled green eggs and ham may be up shortly. http://www.cosrocs.org/htmlpages/08eastereggs.dat" (J.L.)

GUEST's OPINION:
05/08 - "Very cool! Just when you think you've seen everything someone can do with an egg :)" (D.S.)

GUEST's OPINION:
05/08 - "That's pretty cool - but I think you missed a bet by not running a G76G Mojave Green through there! A mutant egg/chicken just deserves a green flame/smoke motor!" (G.P.)

[Enter Rocket Specific Tip]

SPECIFIC ROCKET TIP:
"" (x.x.)

[Enter Flight Log]
Date Name Motor Ejection/
Altitude
Wind Notes
04-12-2008 Jeff Lane AT RMS E23-3 Very Early 5-10 mph winds - Motor burn-through resulted in parachute deployment a few feet off the pad, not enough time for parachute to open. One foot came unglued, will reglue and try again next month.
04-19-2008 Jeff Lane AT RMS G71-4 Very Early 0-5 mph winds - This fllight could have gone another second or so before deployment, but IT FLYS! One leg loose, glue on and go again.
06-14-2008 Jeff Lane G74-4 Mojave Green Just Past (1-2sec) 0-5 mph winds - http://www.cosrocs.org/htmlpages/08eastereggs.html Mojave green flight. Video confirms bonus delay time of 6.63 seconds with a 4 second delay. Chute opened but shock cord broke.
   

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