Looks like a good quality product, which it is of course. Attention has been devoted to everything of importance, gate valves close to the hull units, those pipe clips are of the best quality I have ever seen. It is amazing how much momentum a two inch diameter hose pipe can generate. Here is a question for the science or physics minded people. Would the thrust generated alter if the output nozzles were above or below the waterline? Above the waterline the jet exhausts in air surroundings while below the waterline it exhausts in water surroundings. The answers to this question should be interesting.

@hollandmarineparts

7 жыл бұрын

Hi Carmel, the answer is a surprise to many people: More force/momentum/impulse is generated when expelling water above the waterline. Not much but a bit more. When generating thrust with a water jet, it's all about the flow and speed of the water which exit the nozzle. Turbulence near nozzle opening below the water line slows it down, above the waterline a few percent more thrust occurs. Our systems are designed to function below the water line. We recommend to place the nozzles max forward in the hull for a maximum arm of momentum towards the pivoting point of the boat.