Power Draw of Large Electric Motor?

[Moosey]

I have 4 Large Diesel engines connected 3:1 to a large generator outputting >2200 units of electricity, and it's not enough to power a large electric motor connected directly to a giant prop, and that's with the engines running at >20 rps, wondering if anyone has some insight.

[Axiolot]

Well i can tell ya its a bloody lot

[Axiolot]

i had a medium one and the batteries went down quick even with a jet engine generator

[Ra-Ra-Rasputin]

Brummbar is quite right in that it's "a bloody lot", it's also relative to the load in question, but suffice to say, i would say at the moment the large electric engine is simply not a good idea. I have the details in my power production section in the guide, here:

https://steamcommunity.com/sharedfiles/filedetails/?id=1971613976

Compared to the large diesel, it produces a significant amount of horsepower, but a rather small amount of torque.

[Moosey]

Originally posted by Ra-Ra-Rasputin:

Brummbar is quite right in that it's "a bloody lot", it's also relative to the load in question, but suffice to say, i would say at the moment the large electric engine is simply not a good idea. I have the details in my power production section in the guide, here:

https://steamcommunity.com/sharedfiles/filedetails/?id=1971613976

Compared to the large diesel, it produces a significant amount of horsepower, but a rather small amount of torque.

Thanks, guess I have to find another way to break 30km/hr. I cant seem to get over ~20 with a full length ship and speed is the same with a narrow empty hull, and a huge wide hull with 6 floors and 100000L of fuel

[Ra-Ra-Rasputin]

By 30km/h i hope you're referring to 3.6 times the speed output of the directional speed sensor, which outputs in m/s. 20m/s for a full length ship would be an insane speed, as that would be a tanker or a huge cruiseliner travelling around at 40 knots or 72km/h.

[Moosey]

Originally posted by Ra-Ra-Rasputin:

By 30km/h i hope you're referring to 3.6 times the speed output of the directional speed sensor, which outputs in m/s. 20m/s for a full length ship would be an insane speed, as that would be a tanker or a huge cruiseliner travelling around at 40 knots or 72km/h.

Yes 3.6 * speed sensor for KPH, I've managed to get it to 28 with a single medium electric motor running at 25% and 3 Giant props + 4 engines. Don't think I can get any better tho.

[SamuelPepys]

I use two seperate diesel drive trains each connected to a medium propeller, but with one electric motor added on each that can be injected either a little bit or a lot, and that speeds me up way more than I need to. I just have an automatic generator going seperately to provide me with the "oomph" I need when I inject the motors into the diesel chain. So it's a hybrid system pretty much, but with both diesel and electric working at the same time. Best system I've tried to date.

[Ra-Ra-Rasputin]

Originally posted by SpectreDaemon:

Yes 3.6 * speed sensor for KPH, I've managed to get it to 28 with a single medium electric motor running at 25% and 3 Giant props + 4 engines. Don't think I can get any better tho.

You can. With one simple trick: Run 1 prop.

[NotNice]

Why do people use electric motors to power propellers directly?Do they generate more speed than a combustion engine?

I've only ever used E-motors for bow thrusters and the small auxiliary prop I use for reversing and maneuvering in port.

[Moosey]

Originally posted by Ra-Ra-Rasputin:

Originally posted by SpectreDaemon:

Yes 3.6 * speed sensor for KPH, I've managed to get it to 28 with a single medium electric motor running at 25% and 3 Giant props + 4 engines. Don't think I can get any better tho.

You can. With one simple trick: Run 1 prop.

3 were faster, for me.

[Ra-Ra-Rasputin]

Originally posted by Hunter101:

Why do people use electric motors to power propellers directly?Do they generate more speed than a combustion engine?

They have very high power delivery at low RPM which allows highly reactive throttle. Engines need to pick up RPS gradually.

Originally posted by SpectreDaemon:

3 were faster, for me.

3 shouldn't be faster with how the game works, unless you have them slipping out of the water or something. That being said, you might've hit the maximum peak for the electric engines (20RPS) so you'd need to sneak a gearbox between there to get more out of it. Just be careful not to overdo the gearbox in that case.