18.8 — Engine Storage and Preservation

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An electric aeroplane that stands unused for weeks or months does not stand still. Its propulsion battery keeps changing chemically, losing charge and capacity at rates that depend, among other things, on its temperature and its state of charge; a battery left wired into its own monitoring electronics can be slowly drained by them; and the insulation of the engine's windings is exposed to whatever moisture and dirt the surrounding air carries. This chapter covers what storage requires of an …

5 sections 4 worked examples 4 tables 2 diagrams 1 tip

11 exam-style questions in our bank test this topic. This note teaches the theory behind every one of them.

What you will learn

Storage Requirements for Electric Engines
Battery Storage Conditions and State-of-Charge Management
Long-Term Preservation Procedures
Depreservation After Storage
Environmental Considerations (Humidity, Temperature, Contamination)

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Worked example. A 100 µF capacitor charged to 28 V holds Q = CV = 2.8 mC.

Module 3 · 3.9 Capacitance/CapacitorPDF

Capacitance Fundamentals

Capacitance is the ability of a component to store electric charge. C = Q / V

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18.8 — Engine Storage and Preservation

Practice questions test what you know. This note teaches what you don’t.

Inside this note

Unlock this note and all 306 others

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