Fastest speed attained by a manned rocket aircraft

Fastest speed attained by a manned rocket aircraft (7,270 km/h)

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Fastest speed attained by a manned rocket aircraft (7,270 km/h)

is 10 x World Land Speed record - wheel-driven (738 km/h)...more
is 50 x World Land Speed record - human powered (144 km/h)...more
is 100 x Top speed of an African Wild Dog (72.5 km/h)...more
is 100 x Top speed of an elk (72.4 km/h)...more

If this was a standard unit ...