The lack of noise is a problem if you have ever been nearly run over by an electric milk cart in the UK.
As kids we used to attach a piece of cardboard to the front fork of our bikes with a clothes peg,
this provided the sound as it contacted the spokes and improved our speed no end.
I notice that in the last couple of years in Japan the popularity of electric assist bikes has increased
markedly. They are really only to help on hills but it seems to be the start of something.
Now I wonder how many Hydrogen filling stations there are in America?
All jokes aside, it would not harm the TT if a one-lap celebrity race for alternative powered bikes was to be held
during the festival. The solar powered class may have trouble getting around unless they turned the streetlights on!