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Scrozen Bike Design

This is a site that shows my interest in human-powered vehicles, and my designs and experiments.

27" FWD High-seat Recumbent (FrankenBike)

To the right you will see my first recumbent design. Constructed from a discarded ten-speed bike, 2x4s, plywood and a pair of aluminum crutches for the rear triangle.

This was my first completed recumbent project, and I was very happy that it worked at all! I consider this one a prototype, and I'm currently riding it to shake out the design flaws. I'm close to building a proper version, completely out of steel this time!

Since these photos, I've dropped the seat about two inches, added a shifter for the cassette, improved my braking setup and added a biking computer. My average speed (cruising) is 8.7 mph, and my top speed is 27.3 mph. Not bad for something cobbled together in my garage!

UPDATE 10/23/2006:

The FrankenBike now has 70+ miles on it (including a 23-mile bike trip), and is still behaving respectably. I'm still using it to gather information for Phase Two.

Phase Two

The next phase of the FrankenBike will entail an entire rebuild in steel, adding rear suspension, an adjustable seat, cassette and chainring shifting, and a semi-folding design for easier transport.

As I'm learning to weld while completing phase two, it might be a while before I have something to show. But this will certainly give me a project for the winter months!

Click on any picture on the right to enlarge

recumbent-zoom.jpg

Video of the FrankenBike Crash Test!

Steel, wood and aluminum!
Steel, wood and aluminum!
Foam kickboard watertoy for seat cushions!
Foam kickboard watertoy for seat cushions!
Yep!  Aluminum crutches hold the rear wheel!
Yep! Aluminum crutches hold the rear wheel!
Front-wheel drive!  Works better with a chain!
Front-wheel drive! Works better with a chain!

Questions or comments? Get in touch with me at:

bobmartin067@comcast.net