Document Type: Book (Informational) Purpose: Informational. Authority: Author Expertise. Series: Light Plane Maintenance Library

Scope: General knowledge book written for General Aviation pilots, owners and mechanics. Written by the Editors of Light Airplane Maintenance magazine.

From the dust jacket: "Few pilots truly understand leaning-and troubleshooting-by the EGT (exhausted gas temperature) method. At last, in EGT Systems, pilots can learn the answers to all the most commonly asked questions: How do you determine "best economy" mixture? What is the significance of "peak EGT"? How does EGT relate to cylinder head temperature (CHT), and turbine inlet temperature (TIT)? When should a pilot lean for takeoff? How should the mixture be set for descent? EGT Systems cuts through the fog of misunderstanding that has long surrounded mixture management, and untangles the thicket of mysteries attending troubleshooting via EGT.

This is one book you can't afford to be without! You don't have to be an expert to understand the many facets of EGT instrumentation. EGT Systems was written with both the beginner and the expert in mind. "

Contents (from the Table of Contents): "Chapter One starts with a succinct review of the Otto cycle and four-stroke combustion dynamics before proceeding to the incisive, expanded discussion of "Principles of Mixture Management" in Chapter Two.

Chapter Three continues the discussion of inflight mixture management, recapping common cruise-leaning set-points such as best-economy, best-power, and peak-EGT mixture. Chapter Four is devoted to cylinder head temperature (CHT) instrumentation, and how it relates to EGT. Drawing on the foundation provided by the first four chapters, Chapter Five - "Abnormal Combustion" — ties together earlier material and embarks on an advanced discussion of combustion dynamics as it pertains to preignition and detonation. Here, you'll learn not only why these phenomena are harmful to your engine, but how to spot them (with EGT and CHT) long before they can cause damage to your engine.

Chapter Six, "Troubleshooting with EGT," contains the most advanced discussion yet of how EGT, CHT, and TIT tie together to provide the knowledgeable pilot with a total picture of engine health. Timing effects, combustion knock, probe lag, compression changes, magneto discrepancies, fuel contamination, and fuel-metering anomalies are discussed in the context of EGT and CHT changes and what they mean to the alert pilot.

If you've ever wondered how to install a multi-probe EGT/CHT system, Chapter Seven contains full details (including photos of a GEM 603 system being installed on a Lycoming 10-360). This chapter alone will be worth the price of the book if you are considering installing-or upgrading-a modern EGT system in the near future.

The subject of how best to display EGT information in the cockpit is a complex and controversial one. This subject gets a detailed, incisive, clear treatment in the chapter on "EGT Ergonomics" (Chapter Eight). Is a digital display really best? Does it make sense to "scan through" cylinders individually? What about display resolution? Numeric accuracy? Read this chapter before you go shopping!

Few books devote more than passing mention to EGT or CHT instruments. EGT Systems discusses every aspect of EGT, CHT, and TIT in detail, from purchasing to installation-from inflight interpretation to post-flight troubleshooting on the ground —with unprecedented clarity (in text and pictures). EGT Systems is sure to become a classic in its field."