Fuel and speed

mowgli99 · 08-24-07, 08:19 PM

Just out of curiosity, do any of y'all have ideal speeds for fuel consumption. And also since i am using the intercept method found in the newbie guide do any of you have the estimated speeds for the ruler (Like slow=6knts) because i dont know the others. Thankyou all again in advance.

Gezoes · 08-24-07, 08:58 PM

It depends, but I usually (IXB/C) go ahead slow, 1/3 at most cruising or submerged. On long patrols, it is highly recommended. Also, on ahead slow one can survive the daylight submerged, wich is most helpful.

I save my fuel for emergencies and attacks

(As for the ruler, should you by any chance be using GWX, the GWX mod includes some sheets that should help, look for them in the upper left corner at the periscope station)

Brag · 08-24-07, 09:10 PM

Economical speeds:

II 5 knots
VII 6-7 Kts
IX 8 kts

Reported speeds:

Slow up to 7 kts
Medim 8-9 kts
Fast 9- 12 kts

Very hast probably over 15 knots
Met only one doing 22 knots

I might be wrong by a knot here and there

gimpy117 · 08-24-07, 10:08 PM

yeah, speed is a strange thing, it uses more fuel usage is not directly proportional to speed

mowgli99 · 08-24-07, 10:32 PM

yeah,thanks y'all and yes i am using GWX. This info will help a lot as i am still experiementing with fuel. Also help my intersepting. I can always get medium or slow but fast ships always dissapear without a clue. Thanks again

Jimbuna · 08-25-07, 05:21 AM

Quote:

Originally Posted by mowgli99

yeah,thanks y'all and yes i am using GWX. This info will help a lot as i am still experiementing with fuel. Also help my intersepting. I can always get medium or slow but fast ships always dissapear without a clue. Thanks again

1/3 ahead regardless of boat type is usually close enough to the mark

papa_smurf · 08-25-07, 03:49 AM

Most tijmes I stick to 1/3 speed (around 7 knots), and this I find is the best way to consereve fuel. This is both for the type VII and Type IX/B.

GerritJ9 · 08-25-07, 04:40 AM

Quite correct, fuel and power are NOT directly proportional to speed. They are proportional to speed to the third power. In other words, double the speed from 8 to 16 knots, power requirement goes up no less than EIGHT times- and hence fuel consumption does. This assumes that propeller efficiency remains the same, which in reality is not the case; the lower a propeller's rpm is, the higher its efficiency. However, for our purposes, it's good enough.

08-24-07, 08:19 PM	#1
mowgli99 Engineer Join Date: Jun 2007 Posts: 215 Downloads: 0 Uploads: 0	Fuel and speed Just out of curiosity, do any of y'all have ideal speeds for fuel consumption. And also since i am using the intercept method found in the newbie guide do any of you have the estimated speeds for the ruler (Like slow=6knts) because i dont know the others. Thankyou all again in advance.

08-24-07, 08:58 PM	#2
Gezoes XO Join Date: Nov 2006 Location: The Netherlands Posts: 435 Downloads: 22 Uploads: 0	It depends, but I usually (IXB/C) go ahead slow, 1/3 at most cruising or submerged. On long patrols, it is highly recommended. Also, on ahead slow one can survive the daylight submerged, wich is most helpful. I save my fuel for emergencies and attacks (As for the ruler, should you by any chance be using GWX, the GWX mod includes some sheets that should help, look for them in the upper left corner at the periscope station) __________________ If I wasn't a little mad, I'd go mad.

08-24-07, 09:10 PM	#3
Brag Navy Seal Join Date: Nov 2006 Location: Docked on a Russian pond Posts: 7,072 Downloads: 2 Uploads: 0	Economical speeds: II 5 knots VII 6-7 Kts IX 8 kts Reported speeds: Slow up to 7 kts Medim 8-9 kts Fast 9- 12 kts Very hast probably over 15 knots Met only one doing 22 knots I might be wrong by a knot here and there __________________ 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/

08-25-07, 04:40 AM	#8
GerritJ9 Sonar Guy Join Date: May 2007 Location: Netherlands Posts: 389 Downloads: 47 Uploads: 6	Quite correct, fuel and power are NOT directly proportional to speed. They are proportional to speed to the third power. In other words, double the speed from 8 to 16 knots, power requirement goes up no less than EIGHT times- and hence fuel consumption does. This assumes that propeller efficiency remains the same, which in reality is not the case; the lower a propeller's rpm is, the higher its efficiency. However, for our purposes, it's good enough. __________________ Quamvis Patiens Acris My SH3/SH4 mods: http://www.gamefront.com/files/user/GerritJ9

08-24-07, 10:08 PM	#4
gimpy117 Ocean Warrior Join Date: Jul 2007 Location: Kalamazoo, MI Posts: 3,243 Downloads: 108 Uploads: 0	yeah, speed is a strange thing, it uses more fuel usage is not directly proportional to speed

08-24-07, 10:32 PM	#5
mowgli99 Engineer Join Date: Jun 2007 Posts: 215 Downloads: 0 Uploads: 0	yeah,thanks y'all and yes i am using GWX. This info will help a lot as i am still experiementing with fuel. Also help my intersepting. I can always get medium or slow but fast ships always dissapear without a clue. Thanks again

08-25-07, 03:49 AM	#7
papa_smurf Ocean Warrior Join Date: Jul 2007 Location: High Peak, Derbyshire Posts: 2,851 Downloads: 33 Uploads: 0	Most tijmes I stick to 1/3 speed (around 7 knots), and this I find is the best way to consereve fuel. This is both for the type VII and Type IX/B.