it depends on the prop and weight of boat, 15in prop moves boat forward 15 inches each revelotion,, so with out getting to technical, a 200 lb alum boat and 200 lb person can go about 18-25 miles per hour, depending on shape of bottom of boat, flat or Deep V..............jb
About 240 MPH
70
19 mph
Doesn't work like that. 15 hp is the power of the motor, but the speed you get from 15 hp would depend on how hard it is to push the boat through the water. 15 hp on a canoe would be scary fast while 15 hp on a barge won't do a thing.
it is very fast
8-15
a 75 hp merc goes 19 mph
I have a 14/36 flat boat with a 15 and it goes 26mph with only me and minimal gear.
it all depends on water conditions and the boat.the right size boat for a 100 hp should do around 55-60mph
My 15 ft. aluminum v-hull does 22 mph with a light load in it. More weight = less speed.
The speed of a boat with a 30 hp motor can vary based on several factors, including the boat's weight, design, and water conditions. Generally, a 30 hp outboard motor can propel a small to medium-sized boat to speeds of around 15 to 25 mph (24 to 40 km/h). Lighter boats or those designed for speed may achieve higher speeds, while heavier vessels may go slower.
About 10 to 12 on plane