What does the V-G diagram relate?

• A. Velocity to load factor
• B. Altitude to fuel burn
• C. Thrust to drag
• D. Cabin pressure to airspeed

Answer: (A)

The V-G diagram relates velocity to load factor. It plots airspeed on the horizontal axis and the vertical axis shows the g-load the airframe can safely endure. The curves mark the positive and negative limit load factors; staying inside these boundaries means the airframe isn’t overstressed during maneuvers. This diagram also helps you understand why certain speeds limit how aggressively you can turn or pull, and it’s where you find concept like maneuvering speed (Va), which is tied to not exceeding the limit load factor with finite control inputs. In short, it shows how fast you’re going and how much vertical stress (in g) the aircraft can safely experience at that speed. The other options don’t describe a relationship between airspeed and structural loading.