Planes which have been most successful in recent demonstrations; cost of operating airplane 200,000 mi., 250 round trips; aerial transportation is justified on basis of economy alone if it is required that eight persons travel over line in each direction each month.
Information as to cost of aerial transportation
Stone Webster Jl
Stone and Webster Journal ; 42 , n 6
1928
5 pages
Article (Journal)
English
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The cost of aerial transportation
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