Deltour - Power nacelle for aircraft, French Patent 347128 of 1905
A single sheet of drawings from French patent 347128, filed by Louis Deltour in 1905 for a power nacelle for aircraft, prepared for the French patent office and its examiners. The plate packs numbered figures onto one page in fine ink line: sectioned and hatched engine housings, a plan view of crossed rotor blades and struts, dashed centre lines, lettered part keys, and inked office stamps and serial numbers.
