I still like the idea of a 30-06 spitzer bullet shaped ducted fan. Very light weight and then you use the fan for higher speeds. Plenty of bikes engineered for higher speeds and relatively lightweight
If my 50 year old scooter can go 43 MPH and get easily over a hundred mpg then A bike with a modern engine would be interesting, just a small 4 stroke 50cc so it falls under scooter laws.
What appeals to me is at higher speeds where you can't pedal a normal bike the ducted fan would give you thrust assist, which could be supplemented with pedalling to get to a higher speed or climb a grade' the use the fan to maintain ahigher average speed than you could ever do pedalling.
Carrying an extra source of thrust also would reduce the aero drag, pulling air from high pressure areas and blasting it out in the rear in the normal low pressure area.
regards
mech
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