Originally Posted by
suninmyeyes
Hi Espada 3. Your suggestion is not impossible. I have done several 3 engine takeoffs for real on a 747. There was a special procedure for it, crew only and no passengers allowed. I have also done rejected landings on a twin jet simulator on one engine which involved touching down and putting full power on one engine at a speed of about 120 knots and it took off very easily.
Three engine ferry is an approved AFM procedure for the 747 (obviously non-revenue only) - with established procedures and limits. Those procedures and limits take into account the possibility of an engine failure at/above V1 with proper margins to permit a safe outcome. No first hand knowledge for the L1011, but I assume it has similar approved procedures and limits.
Those procedures simply do not and cannot exist for a twin with an engine inop. Very obviously, if you attempt a takeoff on a single engine on a twin, and that engine fails above V1, a safe outcome is very unlikely.