What factors must be considered when interpolating fuel consumption rates?

When interpolating fuel consumption rates, the factors of weight, altitude, and airspeed are crucial.

Weight directly affects fuel burn; a heavier aircraft requires more power to climb and maintain cruising speed, leading to increased fuel consumption. Altitude comes into play since engine performance and atmospheric conditions change with altitude. Typically, engines may consume less fuel at higher altitudes due to thinner air, but this can also depend on the specific engine characteristics and operational profile. Airspeed affects drag and overall engine efficiency; flying at optimal airspeeds can lead to reduced fuel consumption, whereas flying too fast or too slow can increase drag and fuel requirements.

Combining these factors allows for a more accurate estimation of fuel consumption under varying conditions, which is critical for flight planning and operational efficiency.