No RPS increase on electric motor in boat?

[STORM]

Building diesel electric boat, dimensions ~ (15,12.5,10)m. Problem is gearbox does not increase RPS output on electric motor, stuck at ~ 17RPS. Gearbox works to increase torque but not RPS. Built a test bed of a replica engine in which gearbox does increase RPS of electric motor, odd?, reinstalled game, cleared cache, AppData, ect... but still no RPS increase once built in boat.

Any ideas why no RPS increase before i give up? I assume a game bug or design fault.

[FurBall]

Is the gearbox connected to power?

[STORM]

Yes, no connection problems as it works to increase torque. Also correct torque decrease on dial, but no RPS increase.

[Feudal]

What's the gearbox ratio? Is the boat going any faster? Are you measuring the RPS of the motor or the output?

If you're measuring the motor, which it sounds like you are, and the arrows are pointing toward's the motor, the box is powered and it's set to any ratio higher than 1:1, the output line of power should have higher RPS. The motor RPS would probably decrease too.

Should post it to the workshop and give us a link, this game makes that extremely easy. I'm kind of confused as to what is going on exactly.

[Ra-Ra-Rasputin]

The gearbox does not affect the electric motor*

That's the very simple answer i can give you, but as the most simple answer, that's correct for vast majority of cases.

For the more complex, more correct answer:

The electric motor always outputs its maximum amount of RPS it can muster for the task because it's a directly driven motor, that's limited by the throttle input, of course. The electric motor's torque figure is what directly limits its RPS output. Electric motors are also limited to outputting 20 RPS, the only case where they get benefit from a gearbox is when they are capable of putting out more than that.

[STORM]

1:3

No

Both

Yes arrows to motor

Torque changes both sides, no RPS change on gearbox output

Don't see the point of posting on the workshop as my test build works so i know how it works, but once placed in a boat no change in RPS. Just trying to find out if its a known problem if so how to fix it.

[Ra-Ra-Rasputin]

To put it more straightforward:
Water has a resistance value which is different to dry-running the electric motor in air. Also you're not pushing what's likely a few tons of boat.

You reaching 17 RPS with the electric motor means gearbox won't affect it in any way, regardless of what way it is facing, the electric motor will force itself to give the same amount and type of power delivery. If the electric motor could potentially give out 30 RPS, then adding a 1:2 gearbox would give you slightly shy of 30 RPS (due to the penalty that the gearbox has in power delivery)

[STORM]

All my testing was done under/out of water using all gear ratios. My point is it works on a test bed but not once inside the boat "shell". Water resistance doesn't not come in to play much yet as same RPS value using half the torque.

[Ra-Ra-Rasputin]

Well, can't do more for you than what i've already stated twice in different terms unless you choose to upload that thing.
At any rate, there isn't a bug or a glitch of any sort in there. I have well over a hundred hours just testing engines alone in just about every setup there is.

[STORM]

No problem, i'm sure someone more experienced can help.

[FurBall]

Originally posted by STORM:

No problem, i'm sure someone more experienced can help.

Bruh, you're joking right? If Ra can't answer your question, I doubt anyone can.

[Ra-Ra-Rasputin]

Maybe this will, at least in some way help with your confusion.

https://steamcommunity.com/sharedfiles/filedetails/?id=2019100156

Keep in mind that the left hand side has 8 times the power of the right hand side. The torque value at the readout includes the load, because it's an enclosed two-way system, but does not take into account the actual power-drain from working the load (trying to push the whole build through the ground using a tail rotor in this instance)

The buttons are wired to a flip-flop logic system so you don't have to shut off one to enable the other.

In essence, unlike diesel engines, electric motors will force their performance through a gearbox, and do not have any higher torque output on higher RPS. Like i've said twice now, the gearboxes only ever get used with electric motors when you must have higher than 20 RPS at the output end, and that needs quite a bit of force from the motors. This will come at a significant energy cost unless balanced correctly (which it isn't, here).