BMW did similar for moped riders with their C1 scooter. Enclosing frame, sidebars to protect the arms and seat belt holding the rider inside the safe space. Even a helmet wasn't necessary.It'd useful to know if designing and making a fully enclosed cabin for bicycles, with side impact bars, is worth the effort. What injuries do cyclists get? Mangled legs, cracked skulls, shattered elbows? And in what proportion? Are cyclist injuries similar those of motorcylists, of which there may be more data?
My recent experience of hauling myself + bike + Bafang bbs01b 15A conversion kit with battery + trailer + cargo = 174kg up steep hills, tells me that a fully enclosed bicycle cabin minus my bodyweight is a technically plausible possibility. A cabin weighing about 80kg max really would be ok, I think - this was a complete unknown before I started heaving spring water to my garden from nearby hills. After years of this being something I occasionally thought about, I had a eureka moment this morning for a good design which should be largely easy to construct, and could go some way towards making cyclists as safe as car drivers in collisions. But would it be worth the effort, and would the cycling population at large be interested in buying such an object, or it's design plans to make their own? If nothing is patentable, I'll open source it.
I won't go into the details of my eureka moment or it's actual design, but here's an amusing rough sketch of it's general shape. The lighter green part which I've approximately filled in (not it's actual intended shape), may have to be plexiglass, which will be difficult and expensive to form or get made. Plus side impact bars to protect legs, plus another. It'll fit most bicycles.
Let's face it - it's got as much chance of being mass produced, as similar products Sinclair keep taking pre-orders for.
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But the public won't spend extra on safety, so two years after it was introduced it had to be discontinued due to disappointing sales.