The additional thrust helped make the 533 the first rotorcraft in history to exceed 200 knots (230 mph, 370 km/h), reaching 205 knots (236 mph, 380 km/h) on 15 October 1964.
The additional thrust helped make the 533 the first rotorcraft in history to exceed 200 knots (230 mph, 370 km/h), reaching 205 knots (236 mph, 380 km/h) on ngày 15 tháng 10 năm 1964.