Fuel usage help

Danger · 12-04-08, 05:40 PM

could someone please tell me why there is never enough fuel to complete a mission.

i have tried......
running on 1/3 diesel only to recharge battery's
running on standard
running submerged at day and surfaced at night
running on stop to recharge batteries.

i have tried so many combination's but find nothing that works. i always run out of diesel before i can get back to a port to resupply.
i have even left pearl, stopped at midway resumed but still run out. i am at my whits end with this.
i like to run realistic so use trigger maru 1.4 on realistic setting.

Schani · 12-04-08, 06:01 PM

Heading out on a patrol along the way are refuelling stops (depending on the year), such as Midway and Johnston atoll. An Icon will show up at the upper right hand corner of the screen (an anchor symbol) when you get close to the refuelling stop. Move in close. Come to a complete stop. Then click on the icon. Then click on refit and you should good to go. They're marked on the map just like ports. 1/3 speed should be just fine. By the time you get to the refuelling stop you most likely have used about 9% of your fuel.

Good luck!

hyperion2206 · 12-04-08, 06:02 PM

Quote:

Originally Posted by Danger

could someone please tell me why there is never enough fuel to complete a mission.

i have tried......
running on 1/3 diesel only to recharge battery's
running on standard
running submerged at day and surfaced at night
running on stop to recharge batteries.

i have tried so many combination's but find nothing that works. i always run out of diesel before i can get back to a port to resupply.
i have even left pearl, stopped at midway resumed but still run out. i am at my whits end with this.
i like to run realistic so use trigger maru 1.4 on realistic setting.

Which sub type are you using? Some of them have more fuel on board then others.

Schani · 12-04-08, 06:06 PM

BTW: You may remain on the surface on your way to top off your tanks. Your crew will also be refreshed while refuelling. If needed you may return to the refuelling stop to also replenish any expended torpedoes and get more fuel. I think, but not sure that some damage may be repaired while replenishing. Though one time at Johnston my aft torpedo tubes became damaged. I guess an accident while refitting.

That is all.

SteamWake · 12-04-08, 06:15 PM

Try running at 9.5 knots while surfaced. If you click on the telegraph button (below the telegraph) it will change to speed settings.

Running submerged will not get you any further because you burn more fuel rechaging the batteries. Do most of your cruising on the surface. Only submerge when needed for attacks and avoiding aircraft.

Running at full ahead gobbles fuel, flank swigs it in huge gulps.

Good luck to you.

Danger · 12-05-08, 03:40 PM

thanks , i will try that, i thought that expending batteries then surfacing to recharge would use less fuel.
also. i have not seen any refueling stops, just ports, so i leave pearl and head to midway, refit , then go on my way. other than the ports, i have never seen any refueling stops.

i will try what has been suggested and see what happens.

thanks again.
S-!

Sailor Steve · 12-05-08, 04:01 PM

No, when you are recharging the engines doing that work run at flank speed. Even if they didn't, energy can't be created, only exchanged, and the engines eat just as much during recharging as they do any other time, plus the energy always lost in such a transfer.

SH3 let you get away with that; SH4 is much better that way - or worse, depending on your point of view.

SteamWake · 12-05-08, 06:43 PM

I forgot to mention, but remembered tonight while playing a little.

If your assigned one of those patrol missions "stay on sation for 48 hours" or so, just move to a position you are likely to spot something, cut the engines, and just bob around for the 48 hours.

Set yourself a 'bingo' fuel level, if you reach it head home regardless of having finished your task or not. For me that level is around 40% left. Again cruising home at around 9.5 knots.

Capt. Shark Bait · 12-05-08, 06:54 PM

i've found that about 7kts is the mose efficient fuel wise

SteamWake · 12-05-08, 07:27 PM

Quote:

Originally Posted by Capt. Shark Bait

i've found that about 7kts is the mose efficient fuel wise

There is a command "max range at current speed" mess around with that a bit. It varies from sub to sub but 9.5 knots seems to be the sweet spot for most of them.

Oh yea also forgot to mention if you do run submerged for whatever reason keep it down to ahead slow 2 to 3 knots unless manuvering for an attack. That way it wont take so long for the batts to recharge.

Archive1 · 12-05-08, 07:46 PM

Danger:
Welcome to the forum. Just so you feel better I made the same mistake in thinking that running submerged would save fuel. Not true. I find that I'm on the surface 90% of the time and run at 9.0 to 9.5 knots (GATO and Balao classes), pop in to refuel and rearm by planning ahead and navigating accordingly - gotta think a bit out there.

SteamWake:
I'm not sure that icon/choice is available in SH4 as it is in SH3 - as I recall all you get is distance to the last waypoint, but not a calculation of potential total distance at indicated speed. Could be wrong, but I believe I looked for that info when I also was struggling to figure out how to stay afloat on fumes. Will look for it next patrol.

Soundman · 12-05-08, 08:15 PM

TMO is setup to run most efficiently at standard speed... 9-10 knots.

magic452 · 12-06-08, 01:48 AM

"Max range @ current speed is in TMO but I don't know about RFB.
Checking that at various speeds should give you the best cruising speed
for the boat you are using.

Capt. Shark Bait · 12-06-08, 07:45 AM

that 7kts was for a type VII

Munchausen · 12-06-08, 04:29 PM

:hmm: ... and don't forget what happens if your batteries are damaged.

A little damage and, from then on, your chief will try to recharge them ad infinitum ... meaning, forever. You will need to remind him to stop charging after they've reached whatever the new maximum is. Else, you will burn fuel so fast that ... well, good luck making it back to Midway.

12-04-08, 05:40 PM	#1
Danger Swabbie Join Date: Nov 2008 Posts: 10 Downloads: 0 Uploads: 0	Fuel usage help could someone please tell me why there is never enough fuel to complete a mission. i have tried...... running on 1/3 diesel only to recharge battery's running on standard running submerged at day and surfaced at night running on stop to recharge batteries. i have tried so many combination's but find nothing that works. i always run out of diesel before i can get back to a port to resupply. i have even left pearl, stopped at midway resumed but still run out. i am at my whits end with this. i like to run realistic so use trigger maru 1.4 on realistic setting.

12-04-08, 06:01 PM	#2
Schani Electrician's Mate Join Date: Mar 2006 Location: Grand Forks, ND Posts: 137 Downloads: 0 Uploads: 0	Refuelling Stops Heading out on a patrol along the way are refuelling stops (depending on the year), such as Midway and Johnston atoll. An Icon will show up at the upper right hand corner of the screen (an anchor symbol) when you get close to the refuelling stop. Move in close. Come to a complete stop. Then click on the icon. Then click on refit and you should good to go. They're marked on the map just like ports. 1/3 speed should be just fine. By the time you get to the refuelling stop you most likely have used about 9% of your fuel. Good luck!

12-04-08, 06:06 PM	#4
Schani Electrician's Mate Join Date: Mar 2006 Location: Grand Forks, ND Posts: 137 Downloads: 0 Uploads: 0	Stay surfaced BTW: You may remain on the surface on your way to top off your tanks. Your crew will also be refreshed while refuelling. If needed you may return to the refuelling stop to also replenish any expended torpedoes and get more fuel. I think, but not sure that some damage may be repaired while replenishing. Though one time at Johnston my aft torpedo tubes became damaged. I guess an accident while refitting. That is all.

12-05-08, 04:01 PM	#7
Sailor Steve Eternal Patrol Join Date: Nov 2002 Location: High in the mountains of Utah Posts: 50,369 Downloads: 745 Uploads: 249	No, when you are recharging the engines doing that work run at flank speed. Even if they didn't, energy can't be created, only exchanged, and the engines eat just as much during recharging as they do any other time, plus the energy always lost in such a transfer. SH3 let you get away with that; SH4 is much better that way - or worse, depending on your point of view. __________________ “Never do anything you can't take back.” —Rocky Russo

12-05-08, 06:54 PM	#9
Capt. Shark Bait Ace of the Deep Join Date: Apr 2007 Location: in a convergance zone Posts: 1,186 Downloads: 3 Uploads: 0	i've found that about 7kts is the mose efficient fuel wise __________________ Leiser und tödlicher edler Ritter der Tiefe Corsair Vengeance M70; ASUS Crosshair V Formula-Z; FX 8350; Asus 7870; Samsung SyncMaster 2243SWX; coolmax CUG950B 950w psu; 8GB Kingston HyperX DDR3; Corsair M4 SSD 128GB, WD 1TB; x18 DVR212D; 7SP1

12-04-08, 06:15 PM	#5
SteamWake Rear Admiral Join Date: Mar 2005 Posts: 13,224 Downloads: 5 Uploads: 0	Try running at 9.5 knots while surfaced. If you click on the telegraph button (below the telegraph) it will change to speed settings. Running submerged will not get you any further because you burn more fuel rechaging the batteries. Do most of your cruising on the surface. Only submerge when needed for attacks and avoiding aircraft. Running at full ahead gobbles fuel, flank swigs it in huge gulps. Good luck to you.

12-05-08, 03:40 PM	#6
Danger Swabbie Join Date: Nov 2008 Posts: 10 Downloads: 0 Uploads: 0	thanks , i will try that, i thought that expending batteries then surfacing to recharge would use less fuel. also. i have not seen any refueling stops, just ports, so i leave pearl and head to midway, refit , then go on my way. other than the ports, i have never seen any refueling stops. i will try what has been suggested and see what happens. thanks again. S-!

12-05-08, 06:43 PM	#8
SteamWake Rear Admiral Join Date: Mar 2005 Posts: 13,224 Downloads: 5 Uploads: 0	I forgot to mention, but remembered tonight while playing a little. If your assigned one of those patrol missions "stay on sation for 48 hours" or so, just move to a position you are likely to spot something, cut the engines, and just bob around for the 48 hours. Set yourself a 'bingo' fuel level, if you reach it head home regardless of having finished your task or not. For me that level is around 40% left. Again cruising home at around 9.5 knots.

12-05-08, 07:46 PM	#11
Archive1 Captain Join Date: Jul 2006 Location: Washington State south of Tacoma Posts: 495 Downloads: 26 Uploads: 0	Danger: Welcome to the forum. Just so you feel better I made the same mistake in thinking that running submerged would save fuel. Not true. I find that I'm on the surface 90% of the time and run at 9.0 to 9.5 knots (GATO and Balao classes), pop in to refuel and rearm by planning ahead and navigating accordingly - gotta think a bit out there. SteamWake: I'm not sure that icon/choice is available in SH4 as it is in SH3 - as I recall all you get is distance to the last waypoint, but not a calculation of potential total distance at indicated speed. Could be wrong, but I believe I looked for that info when I also was struggling to figure out how to stay afloat on fumes. Will look for it next patrol.

12-05-08, 08:15 PM	#12
Soundman Commodore Join Date: Jul 2006 Location: Orlando, Fl Posts: 617 Downloads: 60 Uploads: 0	TMO is setup to run most efficiently at standard speed... 9-10 knots.

12-06-08, 01:48 AM	#13
magic452 Sea Lord Join Date: Sep 2007 Location: Reno Nevada USA Posts: 1,860 Downloads: 85 Uploads: 0	"Max range @ current speed is in TMO but I don't know about RFB. Checking that at various speeds should give you the best cruising speed for the boat you are using.

12-06-08, 07:45 AM	#14
Capt. Shark Bait Ace of the Deep Join Date: Apr 2007 Location: in a convergance zone Posts: 1,186 Downloads: 3 Uploads: 0	that 7kts was for a type VII __________________ Leiser und tödlicher edler Ritter der Tiefe Corsair Vengeance M70; ASUS Crosshair V Formula-Z; FX 8350; Asus 7870; Samsung SyncMaster 2243SWX; coolmax CUG950B 950w psu; 8GB Kingston HyperX DDR3; Corsair M4 SSD 128GB, WD 1TB; x18 DVR212D; 7SP1

12-06-08, 04:29 PM	#15
Munchausen Commodore Join Date: Jul 2002 Posts: 608 Downloads: 25 Uploads: 1	:hmm: ... and don't forget what happens if your batteries are damaged. A little damage and, from then on, your chief will try to recharge them ad infinitum ... meaning, forever. You will need to remind him to stop charging after they've reached whatever the new maximum is. Else, you will burn fuel so fast that ... well, good luck making it back to Midway.