my question is concerning jet pumps, but it would relate to props as well. Thats how I will state the question.

If two boats were identical, and two motors were identical, and two props were identical, in theory, those props turning the same rpms would produce the same speed, right?

is that statement right?

disclaimer- i do understand that there will always varibles, no two boats, motors, props, are exactly the same

but if you take the varibles away and only look at the same two props turning the same amount of rpms, one would think that the speed would be similar.



(reason for asking, two flat bottom jon boats, turning the same size impeller, the same amount of rpms (according to tach) was 10 mph different on top end, and the weight of the two boats were very similar.)