ideal geometry may be impossable, but this is as close as it gets. It would be easyer to build a SWB with adjustable seat rather than the boom expanding. Look at Volae bikes.

It took me aver a year to deduce the easyest way to build a recumbent short wheel base bike.

steering manouverability can be limited by over seat and under seat bars unless they are wide enough. Rack and pinion remote from under the seat cup will give the tightest turns.

There should be 6" of pedal foot clearance, but you could get by with as little as 4" if you know how to ride these bikes.

The only other way to get good foot clearance is to shorten the wheel base and use a smlaller front wheel. The old Vission bikes work well like that.

Note the ergonamic angle of the seat to crank (pedal ready to push)...50 to 60 degrees is the most dynamic. these drawings show a 62 degree ergonomic angle withthe seat at 40 degrees. Thats why most hard shell seats are at 35 degrees on high racers.















BUILDING A LWB TOURING BIKE
The future of personal transportation
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My EZ3 Trike the truth about clipless pedals Q-rings and everything
My comuter bike

Under standing trike wheels