I'm new to field, so would prefer something permanent!
BTW, I had intended to write earlier. Your description is both crystal clear and precisely correct.
Incidentally, the slight difference in measuring an ICE vs an electric motor (slow to fast, vs fast to slow) on a dyno is a matter of tradition...
No, it is not. Back pressure is measured in PSI (in the US), which is not an indication of power. It is a measure of torque. (Not torque of...
First, I'll say that I find the general tone of Boat Design Net frequently arrogant and off putting. Fairly often, there are sound technical...
And to further bloviate: Also, any electric motor producing the target power will also make the boat go the same speed: Brushed PMDC,...
Given that some found the graphs presented by the OP confusing, I'll display a couple graphs that are typical of 1. an ICE outboard ... [IMG]...
Having built or specified various battery and motor systems of less than 30 Kw output, I have put together spreadsheets to compare batteries,...
Gonzo: Good news! I found one sentence that you wrote that is technically accurate! I knew there must be one! You then launch into a...
Look through this link: Something strange here about Motenergy......
That's the worst article I have read in a long time. It is full-on bloviation, going on and on with unsupportable (and often wildly wrong)...
Contrary to your incorrect claim that VA is the "proper" measure for an AC motor, Heimfried correctly states that watts in vs watts out (or hp...
Whoops. I thought I remembered a mass of 220 kg. It's really 100 kg. Mea culpa.
Propping a boat for top speed is not that hard. Any high school harry hot rodder can do it. The first thing needed is the boat. The second...
Many years ago I sat on the review committee for the Rigid AirFoil Team (RAFT) at Cornell Univ. And was surprised to find that these engineering...
That's entirely wrong. Just take a look at the graph the OP supplied. It is like the graphs usually provided for electric machines of all...
Oh, BTW, There are twin motor controllers used in high school robotics competitions. I used one to control two trolling motors for steering...
I have no personal objection to gear reductions, because they contribute only a slight reduction in shaft output overall efficiency, but can...
This link provides a typical set of dyno curves for a dc motor:...
