What is the turn radius for 180-degree turn on the E175?

• A. 54' 8"
• B. 59' 2"
• C. 60' 0"
• D. 62' 0"

Answer: (B)

Turn radius is the distance from the turning center to the aircraft’s path during a coordinated turn, and for a 180-degree ground turn it’s the radius of the semicircular path the airplane follows. On the Embraer 175, the published value for this ground 180-degree turn is 59 feet 2 inches. This comes from typical taxi-speed and bank-angle settings used in ground operations, where a moderate bank and a chosen taxi speed produce a semicircular path with that radius. You can think of it as the space the airplane needs to swing through one half-circle without crossing into adjacent lines or obstacles.

If you use the usual relation for a level turning path, R ≈ v^2 / (g tan φ), you can see how speed and bank angle influence the radius. A speed in the 20–25 knot range with a bank angle around the low 40s degrees gives a radius near 60 feet, which matches the published value and explains why this is the correct figure. The other numbers would require noticeably different speeds or bank angles than what is typically used for a standard 180-degree ground turn on the E175.