Another challenge to this project was that it had to contain a functioning DJ booth, which was a greater obstacle when more significant effects were involved and had to be isolated from the DJ. Also, that it had to be assembled in a manner which could collapse into a cargo van, which was a minor miracle. Here's how we went about creating this fun prop:
Step 1: Design and Begin the Framework Structure
The framework is largely composed of 3 sections, the wheels/treads (2), and the center "cabin" section. These sections then further disassemble to some degree.
The tread sections appear wider than they are because the visible end of the treads are wider, along with upper panels which extend further out. This creates visual depth for the wheels and also makes it more compact for transporting. The front sections of the wheel treads are also separate components.
The center section is composed of three flats which bolt together, with the DJ equipment table screwing into place to further stabilize everything. The lower front section of the tank has almost no physical structure as it is a few yards of fluorescent raincoat material connected with velcro to two horizontal 2 x 4's in the center structure and wrapped around a PVC pipe to create a solid shape.
Step 2: Facing the Tank Framework
The wheels are all cut from two different thicknesses of extruded foam insulation sheet. Layered and glued together, then coated with Sculpt and Coat, a plastic like coating that hardens and protects the foam. With enough coats, the foam can be super durable.
The gun was a large diameter PVC pipe, wrapped with fluorescent blue vinyl graphic film.
The laser housing is rectangular and not able to fit inside the end of the pipe, so to solve that challenge and to create a more visually interesting gun end, a notch was created in the PVC pipe wide enough to accomodate the laser vertically with it's offset laser opening now centered in the pipe's opening. Then, the cut end of a black plastic trash can with a hole cut in the bottom is added to the end of the gun along with a ring of near-UV LED's mounted around the laser opening.
Step 3: Wiring the Chasing LED Treads
The connectors are 2.1x5.5mm Jack DC Power Adapter typically used for CCTV Camera installations available on Amazon, Ebay and elsewhere.
I used a 4 channel portable theatrical dimmer pack to chase the lights, but there are many options for 4 channel chasing devices varying significantly in price. They could also be controlled by the lighting operator via DMX.
Step 4: Transport & Assembly
Assembly went problem free and fairly quickly. Check out the photos and notes to see how it all went together on-site.
Wildfire UV paint:
UV laser: prices on these have dropped significantly, and are becoming harder to find. Possibly because of their lower visible spectrum. They however activate fluorescent items brilliantly.