The Worlds fastest and more modern airlines. . . Northwest Orient Airlines double deck Boeing Stratocruisers. Maximum cruising speed exceeds 340 miles per hour. The four great Wasp Major engines generate 14,000 horsepower; and maximum cruising range exceeds 4,500 miles. Spiral stairways, lower deck lounges, large dressing rooms, altitude-conditioned cabins, and many other luxury features distinguish these modern giants of the skies.