Not sure, but I suspect the Trike Of Death was built at the Arcata Kinetic Sculpture Lab. There is a large "extended family" of Kinetic Racers and other artists along the coast of Northern California, constantly collaborating in various ways.
The Kinetic Lab in Arcata is the epicenter. The most experienced burner among them is Scott, but Duane is catching up. We are trying to get Ken & June to go.
You'll find some of their work on Department of Spontaneous Combustion also.
Tons of technical photos from the construction of Berserker, Duck Flambe, and other machines including Duane's fabulous aluminum-skinned dragon that you have seen on the Playa the last two years.