Assertion: arrow's operation | /r/HasProperty | a mach 1.5 cruising speed
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Source sentences:
text: It also specified operation from a 6,000 ft (1,830 m) runway; a Mach 1.5 cruising speed at an altitude of 70,000 ft (21,000 m); and manoeuvrability for 2 g turns with no loss of speed or altitude at Mach 1.5 and 50,000 ft.