How much of the total fuel capacity for a C172S Nav III is usable?

Prepare for the Pre-Solo Aeronautical Knowledge Test with flashcards and multiple-choice questions, each featuring hints and explanations. Ace your exam effortlessly!

The Cessna 172S Nav III typically has a total fuel capacity of 56 gallons. However, not all of this fuel is usable for flight due to fuel system design and safety considerations. In the case of the C172S, the usable fuel amount is approximately 53 gallons. This allows for a margin of safety and ensures that fuel does not become unusable due to the position of the airplane during flight or when maneuvering.

Understanding the usable fuel is crucial for calculating weight and balance, flight planning, and ensuring that the aircraft is operated within its weight limitations for safety. The other options do not reflect the correct amount of usable fuel based on the aircraft specifications, emphasizing the importance of familiarizing oneself with the specific operational data of the aircraft being flown.

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