Extended use of full engine power

[Leandros]

It would have been nice with a mod that restricts the use of "full engine power" relative to time. Either by a warning or the creation of a "technical problem". This "technical problem" should be possible to fix (by the engineers) given a little time. Repeats should result in a permanent technical problem, if possible in an erratic manner. Going full blast on all engines for hours is rather unrealistic.

That said, my feeling is that technical problems usually are fixed too quickly. The general time scale for repairs should also be variable. Just my opinion.

Fred

[Sailor Steve]

For all my complaints about SH2, it actually had mechanical breakdowns and extended repair times. So did good old Aces Of The Deep.

[Karl Heinrich]

That's a great idea Leandros.

We always limit the time spent running the engines at over high RPMs even though the game doesn't penalise it currently.

[LGN1]

Look at Item 19 of H.Sie's great work (and the manual of it):

http://www.subsim.com/radioroom/showthread.php?t=174225



Regards, LGN1

[Leandros]

Originally Posted by LGN1

Look at Item 19 of H.Sie's great work (and the manual of it):

http://www.subsim.com/radioroom/showthread.php?t=174225



Regards, LGN1

Thank you, LGN1 - impressive list of mods. I shall look into it.

Fred

[Leandros]

Oh, well - this looked a little complicated. Need to wait to try this till I have a period with some spare time....Looks necessary, though........

Fred

[mrbannon]

What an interesting thread. Why? Because I blew my port engine going flank after about 10 minutes. Is that normal?

[HW3]

There is also the LRT mod (longer repair time) by ZMC. As far as I know the last version is 2.04, and is made for GWX 3.0.

[GreyBeard]

Originally Posted by mrbannon

What an interesting thread. Why? Because I blew my port engine going flank after about 10 minutes. Is that normal?

Did you mean normal for real or for SH3 with this mod? If the former, I guess you'd have to find someone with intimate knowledge/experience with those engines. I use the H.sie mod, I like it. I recently had one diesel damaged, although repairable, from a crash dive to avoid an aircraft. Thankfully that doesn't seem to be the norm as I've repeated that maneuver several times without consequence. I feel it is better than being able to cruise all day at flank speed with the only detriment being fuel mileage.

[mikey117us]

this is the Translated U-Boat Standing order No. 29
Permanent Order No. 29.

Full speed of main Diesel engines at sea.

During any enemy operation, cruise at full speed with both Diesels every four days for half an hour, while observing cruising times in order to detect signs of engine trouble immediately and to safeguard the full use of the boats fighting capacity when opportunity arises.

C.C. U-boats Top Secret 02809/FS of 28/1/43.
So in Reality Full Speed was War Emergency Power and AK+1 (we can't do in sh3) is Flank Speed with the Electric Motors and Batteries Tied In. And Running at full speed was necessary in the parameters above. But Long Term Running was a recipe for a Broken Boat.

[Leandros]

Originally Posted by mikey117us

this is the Translated U-Boat Standing order No. 29
Permanent Order No. 29.

Full speed of main Diesel engines at sea.

During any enemy operation, cruise at full speed with both Diesels every four days for half an hour, while observing cruising times in order to detect signs of engine trouble immediately and to safeguard the full use of the boats fighting capacity when opportunity arises.

C.C. U-boats Top Secret 02809/FS of 28/1/43.
So in Reality Full Speed was War Emergency Power and AK+1 (we can't do in sh3) is Flank Speed with the Electric Motors and Batteries Tied In. And Running at full speed was necessary in the parameters above. But Long Term Running was a recipe for a Broken Boat.

Diesels + electric? That ought to be a nice modding mission.....

As for permanent order no. 29 I should think it a particularly good idea to run the diesels up at intervals if run for longer periods at economic cruise (langsam fahrt). Diesels do have a tendency to "dirty up". One experience the same in diesel cars which have been "lady-driven".

If I run the diesels on my old minesweeper on idle for long periods it starts to emit a sort of oily "drops" from the funnel. Goes away when pressing it somewhat.

Fred

[GreyBeard]

Originally Posted by mikey117us

this is the Translated U-Boat Standing order No. 29
Permanent Order No. 29.

Full speed of main Diesel engines at sea.

.........cruise at full speed with both Diesels every four days for half an hour, ...........

But not flank speed. I always found that confusing. Why is it called full speed when it is not really full speed, but flank speed is?

[Leandros]

Originally Posted by GreyBeard

But not flank speed. I always found that confusing. Why is it called full speed when it is not really full speed, but flank speed is?

Ok, I am with you on this one - "full speed" is, I believe, something you can live with for a reasonable time while flank speed is really a sort of emergency effort. It was the same with aircraft piston engines at the time. 5 minutes was often set as a maximum but some engines could take it better than others. In a deplasement boat it really means very little regarding what you get out of it. When you have reached the ideal hull speed it takes so very much to increase it. In a aircraft it did, as in a climb with already reduced speed. In aircraft engines it was often coupled with water-methanol injection from a separate fuel tank. The Griffon engines in the Typhoon and Tempest were known to be more sensitive to overboost than, say, the Rolls-Royce or Allison V-12 engines. Simply because the Griffon was more powerful.

Fred

[Maltadog]

<pedantic_mode>
The RR Griffon engine was build in late spitfire versions (Mk XIV mostly).

The engines which powered the Hawker Typhoon and Tempest were variants of the Napier Sabre.
</pedantic_mode>

[GJO]

Originally Posted by Leandros

Diesels + electric? That ought to be a nice modding mission.....

As for permanent order no. 29 I should think it a particularly good idea to run the diesels up at intervals if run for longer periods at economic cruise (langsam fahrt). Diesels do have a tendency to "dirty up". One experience the same in diesel cars which have been "lady-driven".

If I run the diesels on my old minesweeper on idle for long periods it starts to emit a sort of oily "drops" from the funnel. Goes away when pressing it somewhat.

Fred

Thank you Fred - you have provided an answer to a real life situation that we have had for some time. The old Kelvin diesel on our boat does just that after extended inland waterway runs at >250 rpm (I often get covered in small droplets of black oil from the diesel exhaust!) and it needs a real blast at 500+ rpm every now and then to clear it.
I believe that similar orders about the management of diesel engines were issued to German tank crews.