- Upstream = (u−v) km/hr, where “u” is the speed of the boat in still water and “v” is the speed of the stream.
- Downstream = (u+v)Km/hr, where “u” is the speed of the boat in still water and “v” is the speed of the stream.
- Speed of Boat in Still Water = ½ (Downstream Speed + Upstream Speed)
How do you calculate the hull speed of a boat?
Theoretical displacement hull speed is calculated by the formula: velocity in knots = 1.35 x the square root of the waterline length in feet.
How fast will a 150hp boat go?
fiberglass bass boat powered by a 150-hp outboard will have a WOT speed in the 50-mph range, and will have its most economical cruise in the mid-30s with two people aboard.
How do you calculate speed rate?
To work out speed, divide the distance of the journey by the time it took to travel, so speed = distance divided by time. To calculate time, divide the distance by speed.