On the 7th July, 1933, Francis Faure (Left.) set a new World Hour Record of 45.055 km. (27.995 Miles.) at the Parc des Princes Velodrome in Paris.
At that time, the UCI's definition of a "bicycle" was still rather vague, and Faure was able to use this recumbent. However, the UCI later reversed their decision, and Faure's ride disappeared from the UCI's record books.
To this day almost 76 years later recumbent enthusiasts complain that they were robbed. Get over it, is my response. The recumbent is a bicycle in the sense that it has two wheels and you pedal it, apart from this it is an entirely different machine.
The UCI is the world governing body of bicycle racing, and the recumbent is unsuitable for any other form of bicycle racing with the exception of solo record attempts like this one.
It could be argued that the UCI was wrong in that they allowed this record attempt to take place under their jurisdiction, and then reversed their decision later. As I see it, they were simply correcting a mistake that had been made.
The fact that Francis Faure went faster than anyone else at that time is unimportant; aerodynamic fairings are not allowed for the same reason. There are separate World Records for human powered machines, and this is where the recumbent belongs.
To compare the two and say a recumbent is better or worse than a diamond frame bicycle, is like comparing a skateboard to roller-skates, they are two entirely different animals.