Analysis of information sources in references of the Wikipedia article "Hybrid airship" in English language version.
For every 1,000 lbs. lift carried by the planes, approximately 60 lbs. resistance must be overcome by the thrust of the propellers. On the other hand, a 5,000,000 cu.ft. airship flying at 60 mph experiences only about 20 lbs. resistance per 1,000 lbs lift, and the relative resistance decreases with increasing size and diminishing speed. It is apparent, therefore, that the increase in lift obtained by the use of planes on an airship would require a disproportionate increase in engine power and fuel consumption.
there would still remain the apparently insurmountable problems of starting and landing the combination craft
