sentence_pair.en: On the 26th of that month , the Council of People 's Commissars issued requirements that the aircraft should have a maximum speed of 770 km / h ( 480 mph ) at sea level and a speed of 850 km / h ( 530 mph ) at an altitude of 5,000 meters ( 16,400 ft ) .
sentence_pair.fr: Le 26 du mois le Conseil des Commissaires du Peuple a demandé que l' avion atteigne la vitesse de 770 km / h au niveau de la mer et 850 km / h à 5 500 m d' altitude .