0.06” carbon fiber.
● Future: Will compete next at
● Design philosophy: No
compromise in materials or
components. Big weapon, but
make sure it’s drivable and reliable.
● Builder’s Bragging Bits:
•Motor model and brand has never
been revealed until now.
•Six pole motor gives more low-end
torque, no “cogging.”
•Over 60 custom parts total.
•All custom parts fabricated in
my garage, except for waterjetted
•First 12 pound bot to use Li-Poly
•First 12 pound bot to use brushless
•Highest ranked 12 pounder of all
Photos and information are courtesy of
Pete Covert. All fight statistics are
courtesy of BotRank ( www.botrank.
com) as of April 12, 2008. Event
attendance data is courtesy of BotRank
and The Builder’s Database (www.build
ersdb.com) as of April 12, 2008.
PARTS IS PARTS:
Attaching F am Wheels
to Manufactured Hubs
● by Kevin Berry
One of the classic forum posts
by newbie insect builders is
“How do I attach the wheels to
the motors?” They typically are sent
to one of a few hub makers, but
then come to a screeching halt
trying to figure out how to put the
pieces together. Over the past
five years — with lots of help from
other builders — a pretty solid
technique has emerged for doing
this. Illustrated here is a double
wheel stack for beetle
weights, but the same
mechanics work for single stacks
and ant weights. Figure 1 shows the
“Pile ‘O Parts:” a classic Escap 33:1
gearmotor, Lynxmotion hub, Dave
Brown Lite Flight 2” wheels, and
some McMaster-Carr fasteners.
The first step is to gently (or
not) pry apart the press-fitted plastic
hub on the Lite Flites.
Remove the male half of
the hub, leave the female
half intact. Then build a
jig, which is nothing more
than a large nail driven
through a piece of wood,
and slide the hub and
both wheels onto the nail,
hub on top. Then drill
1/16” pilot holes through
two of the threaded hub
holes and both wheels.
Removing everything from
the jig, run a 1/8” bit
through the plastic hubs
(often by hand).
The hubs take an odd
sized screw — a 5-40
thread — which I’ve never
found in a local hardware
32 SERVO 06.2008