Hello I am teaching physical science at an online school, and came across this issue in the textbook - I'm looking to double check with more knowledgeable people before I bring it up and potentially make a fool of myself. In one chapter of the physical science text it discusses various engines. It includes this text about gas turbines: THE GAS TURBINE Another type of internal-combustion engine is called a gas turbine. The main parts of this engine are represented in Figure 26. Air is fed through the inlet pipe into a set of rotating blades in the compressor. The compressed air passes through the pipe to the oil-burning chamber. Fuel oil from the pump is furnished to the oil-burning chamber, where it’s mixed with some of the compressed air from the pipe. This mixture is then ignited and burned in the chamber. The rest of the compressed air is fed through an air passage to the combustion chamber. In the combustion chamber, the air mixes with the gaseous products of combustion and cools these gases to a suitable temperature for use in the turbine wheel. The turbine wheel consists of a large number of blades mounted on a shaft. As shown, the turbine blades and the compressor blades are mounted on the same shaft. The gases, which are under high pressure in the combustion chamber, are allowed to expand and are forced to strike the blades of the turbine wheel at a high velocity. The impact of the gases against the blades causes the shaft to rotate. The rotation of the shaft drives a machine such as the generator, which is used for generating electricity. An electric motor must be provided to start the turbine. Gas turbines are commonly used in aircraft. The most suitable fuels for gas turbines are aviation-grade gasoline and a proper blend of gasoline, kerosene, and fuel oil. with this diagram: https://drive.google.com/file/d/0Bzpz5UtYxWMbUUNzdWo4NS1MQ1MyM2lKOWM5SWhwYXEyZXkw/view?usp=sharing The text and diagram and even a test question states that the combustion chamber is not for burning anything but is separate from the oil burner and is used for cooling combustion products to a suitable temperature. Is this correct? Diagrams from other sources show the combustion actually happening in the combustion chamber. Is my textbook wrong or just unclear? Thank you for your help!