What's the gear ratio?
If in a region where freezing could happen, I'd say frost split. The crack seems to continue along the SB (?) side of the step as well. The...
A general rule of thumb for radius around a "hole in a wall" outlet is roughly 25 % of the diameter. In the case with the fluid crossing the edge...
These tunnels have a shape that is thought to be ok for the flow along the hull, but when you introduce the propeller flow, the picture is changed...
The shape of the tunnel has a big influence on the prop performance; the devil hides in the details. So before we can say anything, you have to...
Was the hull connected to shore power, f.e via a charger when you saw it?
Correct per se, but it also means that the rolling will be resonating with longer waves, having more energy input to increase the roll amplitude.
For a jet with constant nozzle size, the flow is proportional to rpms; the resulting pressure is proportional to rpm^2 and the required power is...
Simon/Fredrik, at what institution do you study, and what is the level of your thesis? I'm asking, because the answers to your quest depend on...
Yamaha have published 3D drawings in STEP format for most of their ob range.
The owners manual says this engine is designed according to a specific leisure boat standard and to operate at full throttle between 3600 and 3800...
....and the fuel consumption at 6 mph then?
The prop in this case is working in a strong wake after the submerged transom. In fact the water is moving forwards, ie the prop is working at a...
......and the splined metal hub in the "rubber hub" props can be turned to a conical hub with splines.
Mercruiser Bravo 2 drives have 1 1/4" shaft and 19 splines IIRC. Not shure if it's the same spline type though, but worth checking, since you...
Checking some numbers, I can't make the ends meet here so I've got to keep pestering you with questions; The consumption figures you quote, are...
....so, when putt-putting along @6 mph you run them completely submerged then?
You didn't respond to the question "how deep do you operate......". What I want to know is if you can trim down the shaft units so the props are...
What can be achieved by a change depends on what you have right now in terms of blade shape and how deep you operate the "sting pins". So if you...
Excellent sum-up, thanx WetFeet!! I'd never open up my shop for a similar concept, unless it was backed up and verified by an engineering firm...
