Not sufficient Fuel

Capn Andy · 04-10-08, 10:53 AM

I have just started my U-Boat career based in Kiel with a Vll boat. My designated patrols such as AN21 are too far away for a return journey with the amount of fuel that the boat carries. Is there an answer to this?

donw · 04-10-08, 11:03 AM

well Mate...if you are using either version of GWX...there is a canal that will get you to open water in a much shorter distance...

Besides that....just keep speed as low as possible...use batteries during daylight hours... and as a last resort...plan for a refueling stop at a friendly port somewhere along the way

vedrand · 04-10-08, 11:04 AM

Andy welcome to this forum!

Your boat certainly does carry enough fuel to reach any point in AN and get back. First of all consider the fuel efficency. Sailing at 6-7 should bring you faaaar away. Try that for the beginning.

HunterICX · 04-10-08, 11:04 AM

Grids AN?
thats Next door.

Are you going full speed all the time? if so you're sucking those fuel tanks empty in no time.

slow down to 1/3 of the speed (about 10 knots)

and welcome to subsim.com

HunterICX

FIREWALL · 04-10-08, 11:06 AM

Welcome Capn Andy

Hylarion · 04-10-08, 11:23 AM

If you set your speed to 7 knots, you'll have roughly 13000 km of autonomy with a VII sub. I've been able to do Wilhelmshaven - Freeport -Wilhelmshaven plus some convoy huntings without intermediate pitstop at this pace.

Welcome onboard Kaleun

Brag · 04-10-08, 11:44 AM

Welcome aboard Capn Andy!

Like the Kaleuns above say, the VII has more than enough fuel to reach any AN grid and operate without problems. Transiting at 7 knots you will arrive at assigned grid with a large fuel reserve.

Der Kolkrabe · 04-10-08, 12:02 PM

Welcome aboard and Der Atlantische Ozean Capn Andy

Using Kanal out and in to Kiel, speed 1/3 ahead and daylights submerged - use that so no problem.

Last night I docked port to my second patrol.

Start Wilhelmshaven and drive by Kanal too Biscay Bay, there North and round British and Shetlands Islands and come back Norway Coast. I got message, that Der Kanal has mines. So I think it's better go long way back...

3Jane · 04-10-08, 12:34 PM

Just over 8 Knotts in a VIIB will give about 22-23,000 Klm I find.

John O · 04-11-08, 10:04 AM

Welcom.

As for fuel usuage, use your navigator to plot a course to a point and then check the distance and maximum range at the current speed. Use differerent speed levels including manual settings of 7, 8, or 9 kts to achieve maximum range. Don't forget to compute the return course and allowable time on station.

Umfuld · 04-11-08, 10:16 AM

Quote:

Originally Posted by 3Jane

Just over 8 Knotts in a VIIB will give about 22-23,000 Klm I find.

Yeah, that's what I get. From ports in France you can hit Canada, yo.

Wreford-Brown · 04-11-08, 09:25 PM

I believe that 9 knots is the most fuel efficient, and there's a way to set your 'ahead standard' to any value you like.
Details here from Average Joe - one of the original pioneers who is unfortunately no longer with us:

"Here's a small speed-change I made to the VIIC class submarine .cfg file (NSS_Uboat7c.cfg).

Default values:
[EngineProperties]
AllStop=0.00
AheadSlow=0.40
AheadOneThird=0.57
AheadStandard=0.80 <---CHANGED to: AheadStandard=0.47
AheadFull=0.94
AheadFlank=1.00
BackSlow=-0.26
BackStandard=-0.40
BackFull=-0.53
BackEmergency=-0.66

This helps me in 2 ways:
1.) Submerged, and 'accidently' creating a new plot-course, especially when extremely close to a pack of DD's, or convoy merchants.
Since SH3 defaults to 'Ahead-Standard' when plotting a new course, sub-noise (props, electric motors, etc.) increases greatly! If this happens I usually get detected; mostly during critical points when trying to slip past escorts, and into a convoy of merchants.
2.) Setting for best fuel-economy cruise speed with the VIIC/42.
The VIIC/42's best 'econ-cruise' speed seems to be right at 9-knots. The change above sets 'Ahead-Standard' setting to 9-knots."

You can, of course, adjust the 0.47 value to change it to your preferred cruising speed. I used trial and error but I think this value is a % of max speed.

04-11-08, 09:58 PM

I made the mistake of going too fast when I was new. Sounds like that is what you did. I quickly learned you can't cruise around at flank speed.

Gezoes · 04-12-08, 07:17 AM

I use 8 kts (VIIB) and use my batteries when full, mostly during the daytime. At night I cruise on the surface.

Click under the speed dial) for being able to specify speed in knots. This way you will not only have plenty of fuel, you will have enough to overhaul.. say a convoy

Especially then, flank speed all you can. You won't feel bad, because you will have saved for that now

Jimbuna · 04-12-08, 09:22 AM

Welcome aboard Capn Andy....advice on optomum speeds already posted

04-10-08, 10:53 AM	#1
Capn Andy Swabbie Join Date: Apr 2008 Posts: 7 Downloads: 0 Uploads: 0	Not sufficient Fuel I have just started my U-Boat career based in Kiel with a Vll boat. My designated patrols such as AN21 are too far away for a return journey with the amount of fuel that the boat carries. Is there an answer to this?

04-10-08, 11:04 AM	#4
HunterICX Rear Admiral Join Date: May 2006 Location: Malaga, España Posts: 10,750 Downloads: 8 Uploads: 0	Grids AN? thats Next door. Are you going full speed all the time? if so you're sucking those fuel tanks empty in no time. slow down to 1/3 of the speed (about 10 knots) and welcome to subsim.com HunterICX __________________

04-10-08, 11:06 AM	#5
FIREWALL Eternal Patrol Join Date: Mar 2006 Location: CATALINA IS. SO . CAL USA Posts: 10,108 Downloads: 511 Uploads: 0	Welcome Capn Andy __________________ RIP FIREWALL I Play GWX. Silent Hunter Who ???

04-10-08, 11:23 AM	#6
Hylarion Watch Join Date: Feb 2008 Location: France, on the Mediterranean sea Posts: 24 Downloads: 81 Uploads: 0	If you set your speed to 7 knots, you'll have roughly 13000 km of autonomy with a VII sub. I've been able to do Wilhelmshaven - Freeport -Wilhelmshaven plus some convoy huntings without intermediate pitstop at this pace. Welcome onboard Kaleun __________________ GWX3.0, patched OLC Gold, Torpedo Damage Final 2, Debris & Lifeboats v4, SH3 Commander 3.2 100% realism, no map updates

04-10-08, 11:44 AM	#7
Brag Navy Seal Join Date: Nov 2006 Location: Docked on a Russian pond Posts: 7,072 Downloads: 2 Uploads: 0	Welcome aboard Capn Andy! Like the Kaleuns above say, the VII has more than enough fuel to reach any AN grid and operate without problems. Transiting at 7 knots you will arrive at assigned grid with a large fuel reserve. __________________ Espionage, adventure, suspense, are just a click away Click here to look inside Brag's book: Amazon.com: Kingmaker: Alexey Braguine: Books Order Kingmaker here: http://www.subsim.com/store.html For Tactics visit:http://www.freewebs.com/kielman/

04-10-08, 11:03 AM	#2
donw Sonar Guy Join Date: Dec 2001 Location: Indiana Posts: 386 Downloads: 25 Uploads: 0	well Mate...if you are using either version of GWX...there is a canal that will get you to open water in a much shorter distance... Besides that....just keep speed as low as possible...use batteries during daylight hours... and as a last resort...plan for a refueling stop at a friendly port somewhere along the way

04-10-08, 11:04 AM	#3
vedrand Bosun Join Date: May 2007 Location: Austria Posts: 68 Downloads: 4 Uploads: 0	Andy welcome to this forum! Your boat certainly does carry enough fuel to reach any point in AN and get back. First of all consider the fuel efficency. Sailing at 6-7 should bring you faaaar away. Try that for the beginning.

04-10-08, 12:02 PM	#8
Der Kolkrabe A-ganger Join Date: Mar 2007 Location: West Coast, Finland Posts: 71 Downloads: 18 Uploads: 0	Welcome aboard and Der Atlantische Ozean Capn Andy Using Kanal out and in to Kiel, speed 1/3 ahead and daylights submerged - use that so no problem. Last night I docked port to my second patrol. Start Wilhelmshaven and drive by Kanal too Biscay Bay, there North and round British and Shetlands Islands and come back Norway Coast. I got message, that Der Kanal has mines. So I think it's better go long way back...

04-10-08, 12:34 PM	#9
3Jane Ace of the Deep Join Date: Sep 2006 Location: York. Northern England. Posts: 1,004 Downloads: 0 Uploads: 0	Just over 8 Knotts in a VIIB will give about 22-23,000 Klm I find. __________________ Fate opposes me in vitality and morality, forced ever onward, burdened, always in shackles. So this very moment, without tarrying, pluck the quivering strings. Because fate punishes the one who plays, all lament with me. (http://hosted.filefront.com/KatherineRowan)

04-11-08, 10:04 AM	#10
John O Gunner Join Date: Jan 2002 Location: Georgia, USA Posts: 99 Downloads: 12 Uploads: 0	Welcom. As for fuel usuage, use your navigator to plot a course to a point and then check the distance and maximum range at the current speed. Use differerent speed levels including manual settings of 7, 8, or 9 kts to achieve maximum range. Don't forget to compute the return course and allowable time on station. __________________ John O There is No Finish Line, Keep Running!

04-11-08, 09:25 PM	#12
Wreford-Brown Sea Lord Join Date: Nov 2007 Location: In sight of Stonehenge Posts: 1,750 Downloads: 51 Uploads: 26	I believe that 9 knots is the most fuel efficient, and there's a way to set your 'ahead standard' to any value you like. Details here from Average Joe - one of the original pioneers who is unfortunately no longer with us: "Here's a small speed-change I made to the VIIC class submarine .cfg file (NSS_Uboat7c.cfg). Default values: [EngineProperties] AllStop=0.00 AheadSlow=0.40 AheadOneThird=0.57 AheadStandard=0.80 <---CHANGED to: AheadStandard=0.47 AheadFull=0.94 AheadFlank=1.00 BackSlow=-0.26 BackStandard=-0.40 BackFull=-0.53 BackEmergency=-0.66 This helps me in 2 ways: 1.) Submerged, and 'accidently' creating a new plot-course, especially when extremely close to a pack of DD's, or convoy merchants. Since SH3 defaults to 'Ahead-Standard' when plotting a new course, sub-noise (props, electric motors, etc.) increases greatly! If this happens I usually get detected; mostly during critical points when trying to slip past escorts, and into a convoy of merchants. 2.) Setting for best fuel-economy cruise speed with the VIIC/42. The VIIC/42's best 'econ-cruise' speed seems to be right at 9-knots. The change above sets 'Ahead-Standard' setting to 9-knots." You can, of course, adjust the 0.47 value to change it to your preferred cruising speed. I used trial and error but I think this value is a % of max speed. __________________ All my mods are available at MediaFire: SH3 Mods Other modders SH3 mods SH4 Mods ...you can't please all of the people all of the time... Last edited by Wreford-Brown; 04-12-08 at 02:42 PM.

04-11-08, 09:58 PM	#13
Flamingboat Stowaway Posts: n/a Downloads: Uploads:	I made the mistake of going too fast when I was new. Sounds like that is what you did. I quickly learned you can't cruise around at flank speed.

04-12-08, 07:17 AM	#14
Gezoes XO Join Date: Nov 2006 Location: The Netherlands Posts: 435 Downloads: 22 Uploads: 0	I use 8 kts (VIIB) and use my batteries when full, mostly during the daytime. At night I cruise on the surface. Click under the speed dial) for being able to specify speed in knots. This way you will not only have plenty of fuel, you will have enough to overhaul.. say a convoy Especially then, flank speed all you can. You won't feel bad, because you will have saved for that now __________________ If I wasn't a little mad, I'd go mad.

04-12-08, 09:22 AM	#15
Jimbuna Chief of the Boat Join Date: Feb 2006 Location: 250 metres below the surface Posts: 190,584 Downloads: 63 Uploads: 13	Welcome aboard Capn Andy....advice on optomum speeds already posted __________________ Wise men speak because they have something to say; Fools because they have to say something. Oh my God, not again!!