Conversion from GF2 to GA

Naval warfare from 1890 through 1940

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mj12games
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Conversion from GF2 to GA

Postby mj12games » Tue Jul 27, 2010 2:34 pm

Guidelines on converting ships from Grand Fleets to Grand Admiral are now available:

http://www.mj12games.com/grandadmiral/GFconversion.pdf
Daniel Kast
Majestic Twelve Games
www.mj12games.com

Carthaginian
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Re: Conversion from GF2 to GA

Postby Carthaginian » Thu Aug 05, 2010 2:27 pm

Wow... ask and ye shall receive!

kylek201
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Re: Conversion from GF2 to GA

Postby kylek201 » Thu Feb 21, 2013 1:28 am

I’m having some difficulty with the Grand Fleet 2 to Grand Admiral conversion formulas and was hoping someone could point out what I’m doing wrong.

For this example I’m going to use the HMS Iron Duke.

BELT ARMOR FORMULA: (GF2 belt armor – 6) x 0.63, round to the nearest integer, then add 2.
GF2 belt armor = 13, so (13 - 6) x 0.63 = 4.41, round to the nearest integer which is 4, then add 2 equals 6. The Grand Admiral armor rating is 7 so I’m 1 off.

SPEED FORMULA: (GF2 speed x 0.83), round to the nearest integer.
GF2 speed = 4, so (4 x 0.83) = 3.32, round to the nearest integer which is 3. The Grand Admiral speed is 4, so I’m 1 off.

GUN DICE FORMULA: (GF2 ROF + 2) x (GF2 GUN DAMAGE) x (0.17 for turrets), round to the nearest integer.
13.5” gun data: GF2 ROF = 0, GF2 DAMAGE = 3, so (0 + 2) x (3) x 0.17 = 1.02, round to the nearest integer which is 1. The Grand Admiral gun dice is 17 so I’m 16 off.

PENETRATION FORMULA: This one is long so I’ll just type it out as I go.
GF2 long range=12
GF2 short range=4
GF2 penetration short range=11
GF2 penetration long range=4
X = (2.96 / long range) = (2.96 / 12) = .24667
Y = (penetration short range / penetration long range) = ( 11 / 4) = 2.75
Z= Y raised to the power of X, (2.75)^(.24667) = 1.28342
GA penetration at range 1 = (GF penetration short range) x 0.63, round to the nearest integer.
GA penetration at range 1 = (11) x 0.63 = 6.93, round to the nearest integer which is 7. This exactly matches the GA data sheet. However, now let’s look at the range 2 penetration.
GA penetration at range 2 = (GF penetration short range) x 0.63 x Z, round to the nearest integer.
GA penetration at range 2 = (11) x 0.63 x (1.28342) = 8.89, round to the nearest integer which is 9. The GA value at range 2 is 6 so I’m 3 off. It continues to get further off at longer ranges.

What am I doing wrong?

Kyle

mj12games
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Re: Conversion from GF2 to GA

Postby mj12games » Wed Feb 27, 2013 3:18 pm

I am reviewing the conversion document, and there are clearly some issues with it. I have no idea where some of those factors came from... For example, the armor factor should be 0.79, not 0.63.

Give me a couple days to redo this.
Daniel Kast
Majestic Twelve Games
www.mj12games.com

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Re: Conversion from GF2 to GA

Postby Ian » Sun Sep 27, 2015 7:53 pm

mj12games wrote:I am reviewing the conversion document, and there are clearly some issues with it. I have no idea where some of those factors came from... For example, the armor factor should be 0.79, not 0.63.

Give me a couple days to redo this.


Was this ever redone? The PDF still has the 0.63 figure.


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