Manufacturer: | Scratch |
Summary
The FAT BOI-NK is a scale version of a popular fat rocket. The body is made
from foam rubber and the fins from foam poster board. I wanted to build
something out of a noodle for a long time, and this contest finally inspired me
to do so. Although this review may not qualify for the contest, I just couldn't
resist submitting it anyway. At least it is in the spirit of the foam/rubber
rocket and maybe it will stir the pot a bit :-)
Components
Construction
The noodle came with a center hole that fit an 18mm motor - it was a natural!
To shape the nose, I wrapped tape around a large drill bit until it fit very
snugly into the hole in the noodle. With the drill clamped in a vise, I shaped
the end near the drill while stabilizing the far end by hand. I used a piece of
coarse sandpaper from a belt sander to remove foam until it looked about right.
I made a fin template from my assembled Fat Boy kit, and included a
½" tab. The body was slotted to accept these tabs. An engine consists
of a section of BT-20 and the nozzle end of a spent casing. I cleaned the
nozzle and plugged it with just a dab of epoxy clay. Hey, sometime you gotta
use what you have on hand. The nose weight was made from a spent engine filled
with clay. I used epoxy to glue in the engine tube, the nose weight, fins, and
the rail buttons. The foam plug in the end of the nose is pressure fit.
Finishing
The colors are basically the natural colors of the materials. I drew the F A T
letters on the fins with a permanent marker and made a FAT-BOI-NK label on my
OfficeJet. This is pinned on for show but was removed for flight.
Flight
Launch Report #1 - I chose a B6 for the first flight. The launch rail was
tilted about 10 degrees to ensure it cleared the launch area. The boost was
nice and the motor ejected near apogee with a loud pop. BOINK! The FAT BOI-NK
bounced several feet in the air and came to rest unharmed. However, it appears
that both rail guides were stripped off, along with a small plug of foam.
Launch report #2 - After adding a standard lug glued to a fin/body joint, I tried a C6-5. I used an Igniterman igniter and taped it to the engine (a mistake). The alligator clips didn't want to let go and the FAT BOI-NK flopped around on the ground.
Launch report #3 - Well, after the previous fiasco I double-checked the CP/CG relationship and everything seemed OK. So, I went to a grassy area near the house and tried again. The FAT BOI-NK is redeemed!
Summary
This was an easy rocket to make and it flies great. Boink recovery is pretty
cool.
Sponsored Ads