Forgot to mention that calculation was with a 1.9 reduction, the original had none. So its not far off, if I am understanding you right? Really...
Ok, so plugging in 92 hp @ 2600 rpm, which is something between peak torque and peak hp, I get a 20 X 16 prop. The calculator says I can achieve...
Right, but is higher load what I want? If I size a bigger prop for lower rpm will that make the engine top out at that point at WOT? I shouldn't...
Ok, so here is my very basic question: If I want to size a prop to take best advantage of my engine at partial throttle, not WOT full load, do I...
I wish I did have the original but I don't. Even if I did I would not use it, that engine was from sort of the first phase of gasoline engine...
Yeah, interesting question. The boat was designed by Morris Whitaker, one of the foremost designers of small powerboats at the time. But, the...
Diesel, yeah. I have thought about that, too, but decided not to go that route. I know about and have access to gas engines, and could not really...
Ok, this is becoming more clear, but it sort of means the graphs and calculators I have don't really help... So torque peaks at 196 ft/lbs at...
Load... now that is another question. What is load, exactly? And if I did select a prop that made my engine top out at 2200 rpm, am I...
Thanks for the replies! It will take me some time to absorb the links but lets see if I understand a few things. First, the most important factor...
I guess part of my hesitation is I am not going for speed, but efficiency. This hull doesn't need 109 hp to reach is optimal speed, and I don't...
I would be glad to work out and provide that information if someone could tell me how. But really the question is about theory, I am not...
Hey folks, signing in to ask for guidance from the experts... So, I am repowering a displacement cruiser from 1910. I have some options for...
