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 demonstrated recently that the multiple engine plane has a factor of safety far beyond what is possible with the single engine.

The Friendship is equipped with three. If one motor fails the other two can carry on, even with the large gas supply for long-distance flying aboard. At the end of a flight, when a minimum load weight has been reached, it is possible with one motor to keep the plane in the air. One engine can also greatly prolong the downward glide of the crippled plane for a forced landing, if need be. For instance, in flying over the ocean if two motors had cut out simultaneously (an unlikely contingency), with the remaining one the plane could have continued much farther than it could have, without any. The power of one motor would have made possible a flatter, and thus more extensive, glide. That long glide might enable one to reach a ship lane, or specifically, come down in the vicinity of some particular