Fastest speed attained by a human-powered aircraft

Fastest speed attained by a human-powered aircraft (44.3 km/h)

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Fastest speed attained by a human-powered aircraft (44.3 km/h)

is 1/20 of Speed of a commercial airliner (880 km/h)...more
is 1/20 of Fastest speed attained by a propeller aircraft (870 km/h)...more
is 1/2 of Top speed of a horse (88 km/h)...more
is about as big as Speed of Usain Bolt at his fastest (yet) (44.7 km/h)...more

If this was a standard unit ...