Early concept utilizing two winches and two springs. A compact coil garage door spring would be pre-wound and a leaf spring catapult arm would be pulled down by the winch.
A second revision single spring system that put the garage spring on a curved piece of metal to fit inside the 3x3x3 box footprint.
The longest line in a 3x3x3 box follows the isometric plane from the top corner to the opposite bottom corner.
Simplified support structure to fit in the isometric plane.
Swing pivot and reverse pivot/stop mechanism in early sketch.
The leaf spring previous to being cut and drilled.
The clamshell of the pivot.
Swing arm putter shaft and pivot being mounted together.
Spacers and bolts in. The clamshell is only missing the swing arm.
Arm fully extended mounted on the pivot clamshell.
Squish plate holding the swing arm in place.
Frame with bearings installed being mocked up
Temporary asymmetric spacers.
Starting to take shape.
Designing the mount for the spring.
Closer look at the sketched location for the spring mount.
Mock up for the spring mount.
Spring mount and spring mount frame installed.
Dropped my Dad's thirty year old tape measure for the last time.
Almost ready to fire.
Spring installed and tensioned.
First fire broke the squish mount for the swing arm.
The farthest throwing machine that was an original design that met the design criteria of the competition.
It was powerful enough to shear the screws supporting the front feet.