United States War Department Technical Manual TM 1–413, Aircraft Instruments, 1942–02–02. Prepared under direction of the Chief of the Air Corps Section I. General 1–2 II. Maintenance, storage, and repair 3–7 III. Installation 8–10 IV. Fuel pressure gages 11–15 V. Suction gages 16–20 VI. Manifold pressure gages 21–25 VII. De-icing pressure gages 26–30 VIII. Oil pressure gage 31–35 IX. Landing gear pressure gage 36–40 X. Engine gage units 41–45 XI. Chronometric tachometers 46–50 XII. Generator-voltmeter tachometers 51–55 XIII. Engine synchronism indicator (Weston) 56–60 XIV. Engine synchroscope (Eclipse) 61–65 XV. Vapor pressure thermometers 66–70 XVI. Electrically operated thermometers 71–75 XVII. Cylinder temperature gages 76–80 XVIII. Fuel mixture indicators 81–85 XIX. Self-synchronous instruments 86–90 XX. Selsyn instruments 91–95 XXI. Fuel level gages 96–100 XXII. Aircraft compasses (magnetic) 101–105 XXIII. Air speed indicators 106–110
