Eddies reference to the venerable McDonnell-Douglas DC-8 reminds me just how unique the old girl was. It's a 4 engine transport. The Super 63, could carry a maximum capacity of 259 passengers and baggage 4,500 statute miles Mach .84 (maybe 500mph). It, being of the first generation (late 1960's) jet transports, did not have "leading edge devices" the sort of flap like moveable leading edges that the crew extends for extra lift during climb and approach. Since the cardinal rule with all jets is that you can either "go down" or "slow down" but not both at the same time (at least very efficiently) and since the DC-8 didn't have the advantage of the more modern lift devices, it was approved for descent with the two inboard engines (2 and 3) in reverse mode. This greatly assisted in greater than usual descent rates. No other aircraft (at least in my experience) could safely or legally do that. Worked well...