Originally Posted by cubguy
The question is how much PERFORMANCE has been lost by the engine failure! In your example I would agree that the GV would have the better engine out performance by far.
You're failing to consider why the Gulfstream has so much more thrust than the Falcon - it weighs a LOT more so it needs the thrust!
Comparing as close to apples-apples as you can between Falcon & Gulfstream products when considering range (900EX vs. G450), the 900EX has a MTOW of 48,300lb and a OEI climb gradient of 340ft/nm. The G450 has a 73,900lb MTOW and OEI climb gradient of 285ft/nm.
Now look at the G550 vs. the 7X. G550 is 91,000lb MTOW with OEI gradient of 242 ft/nm, whereas the 7X is 69,000lb MTOW with OEI gradient of 280ft/nm. That's not really fair because the G550 has about 1000nm more range, so let's compare the G500 which has range similar to the 7X. The G500 has only 85,000lb MTOW with the same engine thrust as the G550, so its OEI gradient is 301ft/nm.