What is the expected fuel usage for a typical 5-minute climb at full power?

The expected fuel usage for a typical 5-minute climb at full power can be understood by considering the fuel consumption rate of aircraft engines during climb conditions. When an aircraft climbs, it operates at higher power settings, which increases fuel consumption compared to cruise conditions.

Typically, a general aviation aircraft in a climb may consume fuel at a rate of about 0.5 to 2 gallons per minute depending on the aircraft's size, type, and engine efficiency. In this scenario, if we estimate the fuel usage to be around 0.45 to 0.55 gallons per minute during a full-power climb, then over a 5-minute period, the calculations would indicate a fuel consumption close to the range of about 2 to 2.75 gallons.

Selecting 2.25 gallons as the answer reflects a reasonable estimate within that range, taking into consideration different performance characteristics of various light aircraft typical in flight training and scenarios which the question implies. This choice accurately considers the increased fuel flow demands placed on the engine during a full-power climb.