Frederick William Lanchester, Aircraft in Warfare — Chapter X (1916)
“ Beyond this the steel dart, to be effective, must be dropped from a height—a very considerable height—and so it is not possible to make a sudden descent for the purpose of bringing off an attack, as is the case when the bomb is the weapon chosen. For these reasons the author does not believe that the dart will have a very great vogue. Once the aeroplane has been satisfactorily adapted to the carrying of a machine-gun, it is quite clear that the steel dart, weighing, as it does, as much as the ordinary Service cartridge, must be regarded as a weapon of doubtful utility. ”
