Where should the thermocouple be positioned in a single probe cylinder head temperature system?

In a single probe cylinder head temperature system, the thermocouple should be positioned at the hottest cylinder. This strategic placement ensures the most accurate measurement of the cylinder head temperature, which is critical for monitoring engine performance and health.

By focusing on the hottest cylinder, the thermocouple can detect the upper limit of temperature that the engine can handle effectively. This helps in identifying potential overheating issues promptly, allowing pilots and maintenance personnel to take necessary actions to prevent engine damage. Monitoring the temperature of the hottest cylinder provides a clear indication of the thermal condition of the engine, as it is the most likely area to exceed safe operating limits.

Placing the thermocouple in other locations, such as near the oil sump or at the lowest cylinder, would not provide a reliable indication of the maximum thermal state of the engine. Similarly, positioning it in the engine bay may result in interference from ambient conditions and would not reflect the real-time temperature of the critical components. Therefore, optimal thermocouple placement at the hottest cylinder is essential for accurate and effective temperature monitoring.