What do the mixing ratios 1-1, 1-4, and 1-9 refer to?

The mixing ratios of 1-1, 1-4, and 1-9 specifically refer to the proportions in which different components are mixed together, often in the context of fuel and oil mixtures for aircraft engines or other mechanical systems. These ratios indicate the relationship between the two substances being mixed, where the first number represents the part of one substance, and the second number represents the part of another substance.

For example, a 1-4 mixing ratio means you mix one part of the first component with four parts of the second component. This precise measure is crucial for ensuring optimal performance, proper combustion, and overall efficiency in engine operation.

Understanding these mixing ratios is critical for plane captains, as they directly impact the safety and functionality of the aircraft. Incorrect mixing can lead to engine malfunctions and potentially hazardous situations. Thus, mastering these ratios is a vital aspect of maintenance and operational practices in aviation.