Series VI N. Sales: 53 built. Deliveries to Saeta, Corse Air, Europe A.S., Minerve, Pushpaka Aviation and Yugoslav Airlines. Caravelle VI-R First Caravelle with thrust reversers. The cockpit windows were made larger with redesigned layout and more powerful brakes were introduced. It first flew on 6 February 1961, obtaining U.S. certification on 5 June that same year. It began service with United Airlines on 14 July. The VI-R was powered by Avon Ra-29 Mk. 533R and Mk 535R (R, for Reverse) engines with a unitary thrust of . Sales: 56 built, 20 for United Airlines. Other series VI customers included Indian Airlines (9), Panair do Brasil (4), Cruzeiro do Sul, Iberia Líneas Aéreas De España (4), LAN Chile (3), Aerolíneas Argentinas (3) and TAP Portugal (3). This model was also used by Filipinas Orient Airways , Aerocesar, Airborne Express and SA Nacionales. Caravelle VII This was a Series III (c/n 042) that was purchased by General Electric, ferried to the United States as Santa Marian 9 and equipped with General Electric CJ805 aft-fan engines, becoming, in effect, the engine test-bed for the Caravelle 10A. Flight tests with the new engines began on 29 December 1960 and a second aircraft was planned to be converted, but this aircraft became the sole Caravelle 10A. Caravelle 10A Based on the Series VII, but intended for the U.S. market, the 10A was longer than the Series VI, with the windows located higher on the fuselage. The sole prototype was powered by two General Electric CJ-805-23C aft-fan engines and flew for the first time on 31 August 1962. A modified wing with improved flaps was fitted to meet U.S. certification requirements, as was an auxiliary power unit (APU) in the rear fuselage. Trans World Airlines (TWA) cancelled its order for 20 aircraft due to financial problems, however, and by the time TWA was in a position to purchase new aircraft, the Douglas DC-9 was preferred. After testing the prototype was scrapped. Caravelle 10B (Super Caravelle) Based on the Series 10A, this variant offered many modifications in respect to other series. It introduced a leading edge extension (a fillet added to the front of an aircraft wings in order to provide usable airflow at high angles of attack). The wing had split flaps instead of the earlier models' double-slotted Fowler flaps and the fuselage was extended , with an increase in passenger capacity to 105. The