Knowledge Gained from Practical Experience in the Designing of Aircraft Engines
This is a 1933 NACA technical memorandum, No. 706, compiled from practical experience in designing aircraft engines and issued by the National Advisory Committee for Aeronautics for engineers and designers in the aviation industry. Its pages are dense mechanical drawings of engine parts, with cross-sections, sectional elevations and numbered figures labelled for reference, showing clutches, reduction gears, crankshafts and superchargers in simple line work. A designer could take from them the clean, labelled technical diagram style, with clear part outlines and minimal shading that reads well at small sizes.
