md88The MD-88 has wider than usual aisles in the coach cabin at 22 inches. Maximum cruise speed for the MD-88 is 543 mph, 874 kmh, or 472 knots. Type Rating. Pilots must earn their typeThe MD-83 and MD-88 are identical in length—the MD-83 can, however, stretch its range to 2,700 nautical miles thanks to auxiliary fuel tanks. Both models are powered by