A RARE WORLD WAR I ROYAL NAVAL AIR SERVICE DOUBLE PROPELLER BLADE circa 1915, comprised of six laminates, stamped 'No. 441' by the boss on one side, and 'ADP' within a circle stamped on the reverse side, six bolt-holes suggesting this to be an early propeller, the blades have been cut down to a little over half length and there is splitting and damage towards their ends, with one blade having significant charing, all indicative of this being a crash recovery, 65in. in length
Other Notes: NB - the ADP mark is a rare inspection and ownership stamp for the RNAS. The staff branch of the Royal Navy which ran the RNAS was called the Air Department (of the Navy). whereas the propellers for the Royal Flying Corps were approved by the Air Board of the Army. Authorities believe ADP stands for 'Air Department Propeller'
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