You are turning 105 RPM, with a propeller pitch of 17 feet, and an estimated slip of -1%. What is the speed of advance?

Correct Answer: Option C — 17.8 knots

Calculate engine speed: (RPM × 60 × Pitch) / 6076.1. (105 × 60 × 17) / 6076.1 = 17.62 knots. Apply the slip percentage: Speed of Advance = Engine Speed × (1 - Slip). 17.62 × (1 - (-0.01)) = 17.62 × 1.01 = 17.796, which rounds to 17.8 knots.