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Its “Ultra-High Bypass Ratio” engine would cut fuel consumption by 5-10 percent and would be ready for service by 2025.

Its “Ultra-High Bypass Ratio” engine would cut fuel consumption by 5-10 percent and would be ready for service by 2025.

As a result, PurePower has a bypass ratio of 12:1.

The proportion of air going around the core compared with that going through it is known as the bypass ratio.

The jet engines on early passenger aircraft had a low bypass ratio, producing a lot of their thrust from the fast-moving air blasting out of the rear of the core.