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At left is the original concept drawing, which dates back
to 2000, and went by the working title "Garage
Logician". Other than the paint scheme, a longer
body, and a change in the nose cone from ogive to bi-conical,
the final design stayed faithful to the original concept.
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| My objectives for this rocket were for it
to be a workhorse that can accommodate a variety of motor
types, particularly my West Coast Systems Hybrid Motor.
I was able to certify Level 1 on an I211
on April 12, 2003, and then Certified Level 2 on a J350 on
October 11, 2003. |
To modify the original design for the WCH I110, I
lengthened the afterbody from the original design so it
could accommodate the 24 inch motor (23.5" internal)
plus some room for installing the vent tube. The extra
length also served to maximize the crush zone in front of
the motor, so as to increase the odds that the casing
would survive a ballistic recovery. |
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Another unique feature is the nose cone design, which
is upscaled from an old MRC nose cone which used to come
in Rogue Aerospace kits (It looks like Custom Rockets now
has them). Because I made it from pine, it weighs a ton.
Click [HERE]
for a .pdf drawing of the nose cone The
nose cone and other weight increases really cut into the
altitude performance. Still, I dig the unique shape, even
though it increased both weight and drag
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The shock cord mount presented a problem in that I
wanted to have good access to the top of the Hybrid motor
for handling the vent tube. My solution was an off center
hole and a U-bracket. The Coupler is glassed on the
inside for extra strength. The result is a strong, zipper
proof design.
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| Click here for the Evil
Grimace RocSim File 
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This is a picture of a
partially reformed grimace. Four of his limbs have been
amputated, but there is still some evil left in him. Here
he contemplates the child before him, wondering if he
should devour him whole, or merely pop his balloon with a
hat pin
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