Rolls-Royce RB 211 engines have completed 1000 flying hours powering the Lockheed TriStar. The 1000th?
Rolls-Royce RB 211 engines have completed 1000 flying hours powering the Lockheed TriStar. The 1000th engine hour was logged during the 127th flight in the TriStar test programme. Under this programme the TriStar will be certificated and enter airline service next April.
Twenty RB 211 engines have now been delivered to Palmdale California for aircraft engaged in the flight test programme. TriStars are flying with engines of 42,000 lb thrust (Flat rated to 51???? F). Airline-standard engines will be delivered to Lockheed early next year.
Pilots from seven airlines including potential customers such as All Nippon Airways and British European Airways have flown the TriStar and have praised the smoothness of the RB 211 and its handling characteristics, as well as its low noise level and barely visible exhaust smoke trails. Airline crews have also commented favourably on the aircraft thrust reverser system.
In flight trials the Rolls-Royce powered TriStar has already reached its peak altitude of 42,000 feet - well above its cruising altitude in airline service. It has also flown at a top sped of 660 m.p.h., equivalent to Mach 0.95 (95 percent of the speed of sound), which is the greatest speed required in its test programme. At 660 m.p.h. it was travelling 100 m.p.h. faster than TriStar's will cruise in airline service.
Other highlights of the TriStar flight programme during the first 1000 engine hours with the RB 211 have included a take-off at maximum weight of 404570 lbs and a maximum flight time of six hours forty one minutes. Test flying of the aircraft has included two crossings of the North Atlantic when the third TriStar flew to Europe in June for the Paris Air Show and visited East Midlands Airport near Derby, on its return from France to the U.S.