FT – Forward Thrust (N)

L – Lift Force (N)

D – Drag Force (N)

α – Angle of Attack (°)

C_L or Cl – Coefficient Lift

C_D or Cd – Coefficient Drag

ρ – Density of Air (Kg/m^3)

U – Apparent Wind Speed (m/s)

A – Projected Area (m^2)

C_T – Coefficient of Thrust

SR – Spin Ratio

U_tan – Tangential Velocity of Cylinder (m/s)

α_t – True Wind Angle (°)

U_t – Longitudinal True Wind Speed (m/s)

V_t – Latitudinal True Wind Speed (m/s)

α_b – Ship Course/Direction (°)

U_b – Longitudinal Boat Speed (m/s)

V_b – Latitudinal Boat Speed (m/s)

U_a – Longitudinal Apparent Wind Speed (m/s)

V_a – Latitudinal Apparent Wind Speed (m/s)

P_s – Power Savings (w)

P_g – Power Generated (w)

P_c – Power Consumed (w)

P_b – Power Consumed by Boat (w)

ω – Rotational Velocity Cylinder (rad/s)

Re_ɸ– Rotational Reynolds Number

r – Radius of Cylinder (m)

d – Rotor diameter (m)

µ – Dynamic Viscosity of Air (kg.m/s^2)

A_w – Dynamic Viscosity of Air (m^2)

C_f – Skin Friction Coefficient

F_f – Frictional Force from Air (N)

f – Rotational Frequency (rpm)