A flight evaluation and analysis of the effect of icing conditions on the ZPG-2 airship

William Lewis, Porter J. Perkins, Jr.
naca-tn-4220
Apr 1958

A series of test flights was conducted by the U. S. Navy over a 3-year period to evaluate the effects of icing on the operation of the ZPG-2 airship.

An Adobe Acrobat (PDF) file of the entire report:
http://naca.central.cranfield.ac.uk/reports/1958/naca-tn-4220.pdf