IM New website just changed. Crew abilities.Twins gone?

[Letum]

Originally Posted by GoldenRivet

sure.

$10?

I say there are at least a couple of things that can be done at sea by a knowledgeable mechanic to temporarily improve the performance of a diesel engine.

i dont care what machine, what computer, what device you are working with - there is always some way to boost the performance beyond "factory limitation" which is the exact language the ubi web site used.

I'm confident that this will only be effective for a short period of time... im also quite confident that it will not involve "magic" and that it will ultimately result in a gain of only one or two extra knots.

you wont see your Type VIIA cutting wake at 35 knots.

OK, a $10 donation to subsim is fine by me.

If ubisoft explain what it is that makes the engines go faster and how it
was possible during the war (and thus no magic is required); you win.

If ubisoft don't explain what makes the engines go faster and/or it wasn't
possible during the war (and so it must be magic); I win.

If the feature isn't in SHV; it's a draw with no transaction.

/shakes.

[GoldenRivet]

Originally Posted by Letum

OK, a $10 donation to subsim is fine by me.

If ubisoft explain what it is that makes the engines go faster and how it
was possible during the war (and thus no magic is required); you win.

If ubisoft don't explain what makes the engines go faster and/or it wasn't
possible during the war (and so it must be magic); I win.

If the feature isn't in SHV; it's a draw with no transaction.

/shakes.

Letum i like you but im no fool.

the entirety of our bet relies on Ubi explaining something? oh.... oh... oh... My sides!!! I'm crying!!! LOL

how about this... if anyone can produce reasonable evidence that increasing the performance beyond factory default - even if by a small margin, of a desiel engine at sea is possible.

and in SH5, once released, the mechanic doesnt just say "Jawol herr kaleun" and it suddenly happens.

then we have a deal

Originally Posted by GoldenRivet

Letum i like you but im no fool.

the entirety of our bet relies on Ubi explaining something? oh.... oh... oh... My sides!!! I'm crying!!! LOL

how about this... if anyone can produce reasonable evidence that increasing the performance beyond factory default - even if by a small margin, of a desiel engine at sea is possible.

and in SH5, once released, the mechanic doesnt just say "Jawol herr kaleun" and it suddenly happens.

then we have a deal

i saw a guy do it on tv by pouring whiskey in the oil

what a waste of good whisky

[fromhell]

yeah man

[GoldenRivet]

http://www.uboatarchive.net/KTBNotesPropulsion.htm

"For a short burst of high speed on surface, if the state of the batteries permitted, speed could be increased about half a knot by running the electric motors and Diesels simultaneously. "

[Nisgeis]

Well, hopefully the engineer would have done all the work whilst in the pen, where he could have the engine apart. There's little you can do whilst you need the engine to be available/running, other than inject more diesel. Diesels have a direct relation between the amount of diesel injected and the power produced, right up until the smoke goes completely black and starts ejecting unburnt fuel. That comes at a cost of fuel efficiency of course and if you run your engine at too high an RPM it can be damaged with joints parting / bearings overheating or melting etcetera.

In port, he could balance the crankshaft, polish the air intakes, check the injection timing, perhaps change the oil filter for a less restrictive one, perhaps if he wanted to change the compression ratio by capping the pistons. It depends what he had available to him. Things will come out of the factory to within a certain tolerance and can be improved.

[GoldenRivet]

Originally Posted by Nisgeis

Well, hopefully the engineer would have done all the work whilst in the pen, where he could have the engine apart. There's little you can do whilst you need the engine to be available/running, other than inject more diesel. Diesels have a direct relation between the amount of diesel injected and the power produced, right up until the smoke goes completely black and starts ejecting unburnt fuel. That comes at a cost of fuel efficiency of course and if you run your engine at too high an RPM it can be damaged with joints parting / bearings overheating or melting etcetera.

In port, he could balance the crankshaft, polish the air intakes, check the injection timing, perhaps change the oil filter for a less restrictive one, perhaps if he wanted to change the compression ratio by capping the pistons. It depends what he had available to him. Things will come out of the factory to within a certain tolerance and can be improved.

all very real possibilities.

we cannot know at this point if the mechanic will be "animated" performing such things. - im doubtful of it

but it can be assumed that these are reasonable things he could do to boost Diesel performance.

in addition to my previous post about daisy chaining the diesels and electric motors.

[magic452]

Older Diesel engine RPM is limited by a mechanical governor. They can be tweaked.
I have done so on many an engine. I am not that familiar with WWII engines but as a professional mechanic I have no doubt it could be done. Was it done? Who knows? You do risk serious damage to the engine if you go too far.

I seriously doubt that it is modeled in the game but it's possible to do.

Magic

[TH0R]

Originally Posted by magic452

Older Diesel engine RPM is limited by a mechanical governor. They can be tweaked.
I have do so on many an engine. I am not that familiar with WWII engines but as a professional mechanic I have no doubt it could be done. Was it done? Who knows? You do risk serious damage to the engine if you go too far.

I seriously doubt that it is modeled in the game but it's possible to do.

Magic

All Diesel engines are limited in one way or another. Now days (cars) mostly because the transmission can't handle the torque, and with ECM. You can see that in car's manual on the torque diagram (I believe newer cars don't have them any more) - it is flat at its peek value for certain RPM range.

I too believe that governors could have been tweaked to produce few extra HP.

[TH0R]

Originally Posted by Nisgeis

Diesels have a direct relation between the amount of diesel injected and the power produced, right up until the smoke goes completely black and starts ejecting unburnt fuel. That comes at a cost of fuel efficiency of course and if you run your engine at too high an RPM it can be damaged with joints parting / bearings overheating or melting etcetera.

Since I doubt they could have messed with superchargers or turbocharges (I don't know if U-Boats had them), the only other way is to advance the combustion - normally the ideal combustion midpoint (per Vibe) is 15-20° after the Top Dead Center => for older Diesel engines with pre-combustion chamber. If you delay the combustion, and move the mid point (T) further back - you get what Nisgeis said. By moving it forward, or advancing it, pressure and temperature will rise in the cylinder, and with that the engine power as well.


By manipulating the combustion midpoint (T) you can either achieve max power, max economy or min. achievable emissions (engine and fuel dependant). I am guessing that they have set it for max economical efficiency (furthest range with min. fuel).


What kind of engines were U-boats using? I assume 2 stroke Diesels, judging by Diesel locomotives. If so, they had to be lubricated as well by adding oil to the fuel before it is injected into the cylinders.


So I am rather incline to believe that they could have squeezed out a few extra RPM by either manipulating with the fuel or oil intake system...


But that is my theoretical guess.

[Letum]

Originally Posted by GoldenRivet

Letum i like you but im no fool.

the entirety of our bet relies on Ubi explaining something? oh.... oh... oh... My sides!!! I'm crying!!! LOL

how about this... if anyone can produce reasonable evidence that increasing the performance beyond factory default - even if by a small margin, of a desiel engine at sea is possible.

and in SH5, once released, the mechanic doesnt just say "Jawol herr kaleun" and it suddenly happens.

then we have a deal

That wording leaves no time limit.
You could just say that someone is about to provide evidence until the
cows come home.

I don't quite see what you don't like about my wording, but this removes
the need for Ubisoft to explain anything:

If anyone can explain the mechanism used in the war to increase engine
power in the uboat's engine, as simulated in SHV, within a month of
release; there is no magic and you win.

If no one can explain the mechanism used in the war to increase engine
power in the uboat's engine, as simulated in SHV, within a month of
release; it must be magic and I win.

If the feature isn't in SHV; it's a draw with no transaction.

In the event that there is disagreement over whether the mechanism
behind the effect in SHV is explained and possible, it goes to public
vote.

Agreed?

ed:

Originally Posted by GoldenRivet

http://www.uboatarchive.net/KTBNotesPropulsion.htm

"For a short burst of high speed on surface, if the state of the batteries permitted, speed could be increased about half a knot by running the electric motors and Diesels simultaneously. "

Very well, if the battery power decreases during the diesel engine overdrive then it is explained.

[GoldenRivet]

deal... its only $10 afte rall.

but have you read the previous 3 posts?

there are several things a skilled mechanic can do to boost engine performance temporarily even if by a small margin.

[Schroeder]

@Sailor Steve

I belief there was only the port and starboard watch. Nothing else. But I'm not really an expert.

[gum22]

Originally Posted by Schroeder

@Sailor Steve

I belief there was only the port and starboard watch. Nothing else. But I'm not really an expert.

There were two Divisions (Seaman's and Technicians). There were two OR three watches depending on which Division a man was in, which job the man was performing, etc.

The IWO and IIWO were both commissioned line officers and members of the Seaman's Division. The LI (ie- commisioned Chief Engineer) led the Technician's Division. The Obersteurmann (<--ie Navigator) was IIIWO on most Type VII's. He was a senior EM. The Oberbootsmann (ie the Crew Chief or Chief of the Boat) was often tasked with being 4th Watch Officer. The IWO and IIWO both stood two tower/bridge watches per day. The IIIWO and OBtsMn split the other eight hour tower/bridge watch period between them (ie stood one each).

Gumby

[gum22]

Great Scott, it's been so long since I've posted my signature has expired!