Sez: >> I think sideways forces on a bicycle wheel are usually minimal, ... >They may be minimal, but I think Bob is right - I would think the force feedback is an integral part of the natural balancing. I've not ridden a recumbent, so I'm only trying to imagine steering with an underseat handlebar with no feedback, but I don't think I would like it. Underseat steering is a real trip at first. Most people can't ride it without some practice. My earlier effort at underseat steering worked fairly well, but suffered from several problems. The first of which was the bike was made out of 1.5" EMT tubing, way too soft for a bike! The whole bike would shimmy at about 60kph/40mph >> be arranged with a heavy duty end-stop since you have a 40 cm lever... >I thought you were from the U.S.? Have you been converted to metric? Friends don't let friends use inches. I've been trying to stay with Metric ever since High School. My lab finally decided everything must be metric after the last fiasco. Remember what happened to the Mars satelite? Well that same thing happens to toasters, too only you can still find them after the fiasco occurs. All of them are made in factories that are all metric, with circuits boards that are all metric and so on. >Someone else mentioned a concern about the battery. I would assume that you would take advantage of turning wheels for power as much as possible. If wheels not turning, steering probably isn't critical. I am planning on using a lead-acid cell beause they are cheap and the voltage is a reliable indicator of state-of-charge. An LED will be green if the voltage is OK, red if it is below a threshold. I could even put an audio alarm on it. Hope to put this where it will be visible by the rider. --Lawrence -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body