In what scenario is usability of 6.2 GPH achieved at 7,500 feet?

The usability of 6.2 gallons per hour (GPH) at an altitude of 7,500 feet is achieved when the engine is operated at 52 percent power. This scenario often reflects the optimal fuel consumption rate for a specific aircraft and conditions at that altitude. Operating at this power setting typically balances fuel efficiency with the necessary performance, allowing the engine to run effectively without overburdening it.

Higher power settings may result in increased fuel consumption without a proportionate gain in performance. Conversely, too low of a power setting might not provide the necessary thrust for efficient climb or cruise at the given altitude, potentially leading to sluggish performance or inadequate airspeed. Thus, 52 percent power is established as the optimal setting for achieving 6.2 GPH efficiently at 7,500 feet.

The other percentages represent slightly higher power outputs that would lead to increased fuel consumption without yielding the desired fuel burn rate. Therefore, a power setting of 52 percent is crucial for maintaining that specific fuel efficiency at the altitude in question.