How does a reduced-power climb affect trip fuel consumption?

A reduced-power climb typically increases trip fuel consumption due to several aerodynamic and operational factors. When an aircraft climbs at a lower thrust setting, it might not reach the most efficient climb profile. The engines may operate at a lower power level, which can lead to longer climb times since achieving altitude might take longer than if the aircraft were climbing with a full power setting.

This increase in time spent during the climb phase can result in higher overall fuel usage, as the aircraft may continue to operate in less efficient conditions for a longer duration. Additionally, at reduced power settings, the engines might not perform optimally, leading to an increase in drag that also contributes to higher fuel consumption during the climb.

Therefore, while using less power may seem like it should reduce consumption, the reality is that it can extend both altitude acquisition times and drag effects, culminating in a situation where total trip fuel consumed is actually greater during a reduced-power climb.