PROJECTS: DOUBLE PENDULUM
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6. ASSEMBLE YOUR DOUBLE PENDULUM
To attach pendulum bearings to each other, use
7" bolts with
nuts to make free pivots or fixed joints.
To adjust spacing between the pendulums, put nylon washers
or other hard spacers on the bolt between the bearings to help
space a pivoting joint. Place a flat rubber washer between the
bearings to create a fixed, non-pivoting joint when the nut is
tightened.
Build these 3 basic configurations following the diagrams:
Simple Double Pendulum
Mount one of the end bearings of the long pendulum onto the
support rod or dowel attached to the stand. On the opposite
end of the long pendulum, attach a short pendulum, using a
pivoting joint.
Triple Pendulum
When all 3 pieces are allowed to swing from pivoting bearings,
the system becomes a triple pendulum.
Don’t push the bearing onto the pivot rod so far that the rod
extends beyond the face of the bearing. If you do, it will interfere
with the motion of the smaller pendulum.
You’ll need to space the pendulums apart using plastic washers
on the pivots so that they don’t interfere with each other as they
rotate.
Rott’s Pendulum
Place the support pivot in the center bearing of the long pendulum. Then attach the 2 short pendulums to either end of the long
one, fixing one of the joints at 90° and allowing the other joint to
pivot freely. This creates a big L-shaped pendulum and a smaller
side pendulum.
DOUBLE
PENDULUM
TRIPLE
PENDULUM
ROTT'S PENDULUM
FINISH X
98 Make: Volume
22
NOW GO USE IT »
