My ships are slower than designed

[stpaul]

I wonder why my ships are slower than designed just when they were built. And also, what is the small 'c' after the speed means? 

[dorn]

Welcome to the forum.
Just as the first ship of the class is commissioned you get event about it.
There can be several possibilities and one of them is that ship can surpassed her design speed or even opposite does not achieve design speed.

So all ships of that class have this advantage or disadvantage.

Look everytime the first ship of the class is commissioned.

"c" means that ship is equipped for colonial service and get bonus to requirement of having ships on foreign stations. The reason is that ships larger 6000 tons get 2/3 malus for dispacement over 6000 tons. If ship is equipped for colonial service she get 25 % bonus.
Eg. cruiser 4800 tons counted 4800 tons toward foreign station requirements.
But if ship has 'c' it is 6000 tons.
If you have battlecruiser with 24000 tons, it is only 12000 tons (6000 + 18000 * 1/3)

You can add this equipment in design window bottom left.

It is best for cruisers and "gunboats"- small MS in RTW1 (KE in RTW2).

[aeson]

The battlecruiser's speed issue is almost certainly the result of the design having improperly inherited the 'bulged' status (I forget what causes this to occur, but probably using "open design" on a ship that's been bulged to create your new design), which improves effective torpedo protection but reduces the ship's service speed by ~10% of the design speed; the destroyer's speed issue probably results from the same cause, though I would have expected a bulged 33-knot destroyer to be reduced to 30 knots rather than 31. You should be able to correct this with a refit to remove the bulges once the ships complete.

The 'c' indicates that the ship is fitted for colonial service (i.e. it counts for 25% more than its displacement for the purpose of foreign station tonnage requirement fulfillment).

The reason is that ships larger 6000 tons get 2/3 malus for dispacement over 6000 tons.

This mechanic doesn't exist in RTW1.

There can be several possibilities and one of them is that ship can surpassed her design speed or even opposite does not achieve design speed.

As far as I am aware, "exceeds design speed" only increases service speed by 1 knot while "fails to achieve design speed" only decreases service speed by one knot relative to design speed; the only explanation that I know of for a two- or three-knot discrepancy is the bulging bug. Furthermore, the speed modifications from these events are only applied once the lead ship of the class has been completed, but these ships are under construction and I don't see any clear reason to believe that they're the second or later units of their class.

[stpaul]

Thanks for the replies. These are the first ships of their classes, no refits. So I think maybe it's not due to the trial events nor the torpedo bulges. I've made some small adjustment in speedHPtable to lessen the weight of engine for smaller ships, but I don't think this is the trigger because the other earlier ships seem not to have this trouble.

[aeson]

Oct 5, 2022 0:16:06 GMT -6 stpaul said:

Thanks for the replies. These are the first ships of their classes, no refits. So I think maybe it's not due to the trial events nor the torpedo bulges. I've made some small adjustment in speedHPtable to lessen the weight of engine for smaller ships, but I don't think this is the trigger because the other earlier ships seem not to have this trouble.

The issue that I brought up with torpedo bulges applies to new designs - there's a bug in RTW1 that sometimes improperly sets 'bulged' status for new designs, which means ships built to those designs are bulged as-built. Your battlecruiser is almost certainly suffering from this - it's showing a service speed of 24 knots, which is exactly what you'd expect for a 27-knot ship that's been bulged - and since I can't think of anything else that would cause this I'm inclined to think that the same is true for your destroyer.

Adjustments to speedHPtable shouldn't have any effect on how the service speed shows up in-game; that only matters for determining tonnage costs.

[stpaul]

Thanks, now I can understand.

[beastro]

If it annoys you bad enough you can modify it in the files.

The difference will be between "design speed" and "speed" in the design save file. Then, you'll need to go into the RTWgame file and change the speed of specific ships built after the design file was modified.