non-fictionOverview of installation, fault identification, overhaul & performance testing of engines. No publication date stated.ground engineers' licence, survey of aero engine types, engine installation & services, tracing aero engine trouble, top overhauls, rating & performance testing of aero engines, aero engine testing, aero engine starting & starters, starting troubles & remedies, engine instruments & their indications

non-fictionOverview on navigation, inspection & tests. No publication date stated, but looks to be around late 1930s/early 1940severyday precautions, daily pre flight inspections, fuel & oil systems, magnetic compasses, air photography, annual overhaul, air navigation, launching & hauling in large flying boats, acceptance tests, navigation on long flights over sea, tracing internal combustion engine troubles, astronomical navigation, testing flying boats, safety measures in the air, air photography interpretation, directional radio systems, boost pressure & mixture strengths, the controllable pitch airscrew, aerobatics effect on carburation, overhauls, anti corrosive measures, fabric coverings, starting troubles & remedies, maps & charts, aircraft design, the rating & performance testing of engines, aero engine accessories