Eco-Cycle pictures and captions.

Kip Marzullo in Captain's Seat (rear) and Kyle in Pilot's seat on Humboldt State
University's campus in Arcata California, USA. That's a globe on the front,
no doubt found on their recycling adventures.
Above is a shot of the left axle of the Eco-Cycle showing an Arai drum on the
left and a band brake on the right. The right axle the two kinds of brakes.

Here is a shot of the new wheel carier with disc brakes on the Eco-Cycle trailer.
The fenders are to reduce the visibility of the disc brakes so that they stay
with the trailer longer.
Here I am standing on the Eco-Cycle trailer. I have lost my school boy figure
and weigh about 200 pounds. I can still do 30 mph on my RANS V2.

Here is a good view of the parking brake lever. The flanges of those rear wheels
are about 5 or 6 inches apart and provide great lateral strength for the 26
inch mountain bike rims.
All the gear down is done at the rear axle. This allows the use of standard
bike driveline every where else without too much over stressing. There are 40
tooth chainwheels on the rear axles below. The single freewheels up top on the
jackshaft are 16 tooth if I recall correctly. Also note the 1 1/4 inch square
tube and compact layout of the final drive. This system holds together well
under the high stress of low gearing and heavy loads.
This shows the freewheel cluster and rear derailler hanger.