I'm still not clear on this issue. If a plane, say, is rated at 120 minutes ETOPS, does that mean that it can never be at a point from a suitable landing area which is more than the distance that it will be able to fly in 120 minutes under the power of one engine? Do they calculate that distance at the reduced speed of one engine and do they factor in the cruising altitude and the glide ratio? Also, will a twin-engined airliner not stay airborne on one engine alone? It certainly could not stay at the same speed or altitude with one engine out, but does the ETOPS rating imply that after the, say, 120 minutes has elapsed, the airplane will be in the drink and, therefore, must have already reached its emergency landing strip? Can a twin-engined airliner not stay airborne indefinately on one engine at a decent altitude as long as the fuel lasts or does ETOPS really mean
"Engines Turn Or Passengers Swim"?
An optimist robs himself of the joy of being pleasantly surprised