Featured
This Month:
14 BUILD REPORT:
Building High Inertia
Weapons with Novel
Materials
by Martin Mason
Team Bad Kitty
17 Dear Santa: All I
Want for Christmas is
a Heavy Weight Bot
by Kevin M. Berry
19 PARTS IS PARTS:
Screws: Keeping
It Together
by Mike Jeffries
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BUILD REPORT:
Building High Inertia
Weapons with Novel
Materials ● by Martin Mason, Team Bad Kitty
The term “glass cannon” refers to a class of robot that has insane offensive power coupled with
low defense. For those of us who
think that anything less than one third
of our robot weight in a powerful
weapon is a sign of weakness, there is
an endless quest for higher kinetic
energy and angular momentum
weapons. Table 1 defines some terms.
14 SERVO 12.2015
Quantity Definition Units
Inertia (I)
The resistance of an object
to a change in its motion.
The rotational equivalent
of mass. Includes both the
mass and distribution of
mass of the object.
ft.lb or m.N
Angular Velocity (ω) The rate at which the object spins. RPM or Radians / Sec
Rotational Kinetic
Energy (Kr)
The energy stored in the
rotation of a massive object.
Energy is the ability to
do work.
Joule or lb.ft
Angular Momentum (L)
Quantity of rotation of a
body. Conserved in collisions
of rotating objects.
kg m2 /s
Table 1.
