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FFG ship stat conversion
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Mojomoe
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PostPosted: Sun Aug 19, 2018 11:54 am    Post subject: FFG ship stat conversion Reply with quote

Heya folks -

One of the things I’ve been working on for a while for my own entertainment is a method of converting FFG’s ship stats to D6, mostly because it seemed like the systems were too different and it couldn’t be done. I’ve recently come up with a system of conversion, and I wonder if that’s something anyone would be interested in?

I’d be happy to post it here if so.

It’s certainly different from conversion between D20/SAGA and D6, in that the math behind the conversions isn’t nearly so straightforward. I’ve had to use some pretty complicated equations to plot what on some cases are either exponential, logarithmic, or polynomial coefficients, but I think I’ve got a pretty solid matrix.
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Whill
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PostPosted: Sun Aug 19, 2018 12:11 pm    Post subject: Re: FFG ship stat conversion Reply with quote

Mojomoe wrote:
One of the things I’ve been working on for a while for my own entertainment is a method of converting FFG’s ship stats to D6, mostly because it seemed like the systems were too different and it couldn’t be done. I’ve recently come up with a system of conversion, and I wonder if that’s something anyone would be interested in?

I’d be happy to post it here if so.


It’s certainly different from conversion between D20/SAGA and D6, in that the math behind the conversions isn’t nearly so straightforward. I’ve had to use some pretty complicated equations to plot what on some cases are either exponential, logarithmic, or polynomial coefficients, but I think I’ve got a pretty solid matrix.

Heya Mojo. I love math and I'd love to see a conversion system for FFG to D6, even if only for ships and vehicles. I'm sure other people would be interested in conversion too. Thanks!
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Raven Redstar
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PostPosted: Sun Aug 19, 2018 1:29 pm    Post subject: Reply with quote

I too, am interested. Always love having more ships to shop for!
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Pel
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PostPosted: Mon Aug 20, 2018 11:23 am    Post subject: Reply with quote

I'd like to see that also. Smile

Are you focusing on the X-Wing game or covering the Armada ships too?
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Mojomoe
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PostPosted: Mon Aug 20, 2018 2:03 pm    Post subject: Reply with quote

Okey dokey! This is copypasta'd from my Reddit post in the FFG forum, which you can find here. Please take a look and let me know if there are any comments or suggestions on these formulas!

Here's the Reddit thread https://www.reddit.com/r/swrpg/comments/98l7zz/d6_ship_conversions/

Ok, here we go!

To start with, it's important to note four things:

1. This is an approximation designed to cover the *largest number of stats with the most accuracy*. As such, there are some ships that **do not convert correctly**, the primary reasons being a) FFG and WEG do not agree on that ship's capabilities (one or the other has statted it higher or lower than the average for its class), or b) FFG's or WEG's stats are inconsistent with each other. If a ship doesn't convert over 1:1 that's ok - it usually just means FFG thinks of the ship a little differently than WEG does. Still, these formulas have been heavily tested and perform with about 80% accuracy.

2. WEG is a *more granular system* than FFG. This means that when converting from WEG into the much simpler FFG, there is **information lost**. As such, if you were to convert a WEG stat to FFG and back again, you would likely get a different result each time. This is expected with systems of different density.

3. Each system has statistics for things that the other system does not. In many cases, these can be approximated, but are not 100%.

4. I am always looking for help refining these conversion tables!

# Silhouette and Scale

How big is the ship? FFG Silhouette is an abstraction of scale, but there is a clear and mostly consistent silhouette-to-length conversion. Because each Silhouette matches to a range of size, for ships which do not have a listed length, simply use the hand-adjusted estimate for each Silhouette, which matches the majority of ships to within a few meters (or a few dozen, for larger Silhouettes).

| FFG Silhouette | Length | Length Estimate | D6 Scale |
|----------------|---------------|-----------------|-------------|
| 0 | 0-1.5m | 1 | Starfighter |
| 1 | 1.5-2.5m | 2 | Starfighter |
| 2 | 2.5-7m | 5 | Starfighter |
| 3 | 7-20m | 12 | Starfighter |
| 4 | 20-35m | 30 | Starfighter |
| 5 | 35-250m | 150 | Starfighter |
| 6 | 250-600m | 300 | Capital |
| 7 | 600-1,000m | 800 | Capital |
| 8 | 1,000-2,000m | 1,500 | Capital |
| 9 | 2,000-20,000m | 10,000 | Capital |
| 10 | 20,000+m | 20,000 | Capital |

# Speed

How fast is the ship? FFG Speed has a pretty clear direct conversion to WEG "Space" rating, although again FFG is a simpler system than WEG so there is data loss in the exchange.

| FFG Speed | D6 Space | D6 Amosphere |
|-----------|----------|----------------|
| 1 | 3 | 260 ; 750 kmh |
| 2 | 4 | 280 ; 810 kmh |
| 2 | 5 | 295 ; 850 kmh |
| 3 | 6 | 330 ; 950 kmh |
| 3 | 7 | 350 ; 1010 kmh |
| 4 | 8 | 365 ; 1050 kmh |
| 4 | 9 | 400 ; 1150 kmh |
| 5 | 10 | 415 ; 1200 kmh |
| 6 | 11 | 435 ; 1250 kmh |
| 6 | 12 | 450 ; 1300 kmh |

# Handling

How maneuverable is the ship? FFGHandling converts pretty cleanly to D6 Maneuverability, although the FFG system does not have a clean ramp. I started with a clean linear progression, but ended up hand tweaking because I was getting values too low on the lower end of the chart.

| Handling | Maneuverability |
|----------|-----------------|
| -4 | 0D |
| -3 | 1D |
| -2 | 1D+1 |
| -1 | 1D+2 |
| 1 | 2D |
| 2 | 2D |
| 3 | 2D |
| 3 | 2D+1 |
| 3 | 2D+2 |
| 3 | 3D |
| 3 | 3D+1 |
| 3 | 3D+2 |
| 3 | 4D |

# Crew and Passengers

These convert cleanly across

# Cost

This converts cleanly across, though the two systems tend to disagree on the values for certain ships. In general, WEG's "used" cost is half (0.5x) the "new" cost (FFG is given only in "new" cost)

# Hardpoints

Still working on this one... Seems to be a function of length.

# Encumbrance

How much can this ship carry? FFG's Encumbrance is an abstraction of carrying capacity, which converts pretty cleanly (though not intuitively) to WEG's Cargo Capacity, which measures in mass.

| Silhouette | Cargo Capacity | Example of 5 Encum |
|------------|-----------------------------|--------------------|
| 0-3 | Encumberance x10 kilograms | 50 kilograms |
| 4+ | Encumberance x1 metric tons | 5 metric tons |

# Hyperdrive Class and Backup

This converts clean across.

# Armor

How strong is the ship's exterior? FFG's Armor rating converts pretty cleanly to WEG's Hull rating, when grouped by length. Look up the ship's length, find its Armor rating, and the column it's in will tell you its WEG Hull rating. Note that this is the primary determinant of WEG Hull when going from FFG > WEG. Do not use Hull Trauma to calculate Hull, as that conversion is less accurate.

| Length | 1D | 2D | 2D+1 | 2D+2 | 3D | 4D | 5D | 6D | 7D |
|--------|----|----|------|------|----|----|----|----|----|
| 0 | 0 | 1 | 2 | 2 | 3 | 4 | 5 | 6 | 6 |
| 20 | 0 | 1 | 2 | 3 | 3 | 4 | 5 | 6 | 6 |
| 50 | 0 | 4 | 5 | 5 | 5 | 5 | 6 | 6 | 6 |
| 300 | 0 | 5 | 5 | 5 | 6 | 6 | 7 | 7 | 7 |
| 600 | 0 | 7 | 8 | 8 | 8 | 9 | 9 | 9 | 10 |

# Hull Trauma

How much damage can the ship's exterior take? This can be a little finicky, but the conversions work more often than not. Do not use Hull Trauma to calculate Hull, as it is less accurate. Only use this when going FROM WEG to FFG.

| Length | 1D | 2D | 2D+1 | 2D+2 | 3D | 3D+1 | 3D+2 | 4D | 4D+1 | 4D+2 | 5D | 5D+1 | 6D | 7D |
|--------|----|-----|------|------|-----|------|------|-----|------|------|-----|------|-----|-----|
| 0 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 10 | 10 | 10 | 11 | 11 | 11 |
| 10 | 5 | 6 | 6 | 6 | 15 | 16 | 17 | 18 | 19 | 20 | 20 | 22 | 25 | 28 |
| 20 | 15 | 16 | 16 | 17 | 17 | 19 | 20 | 22 | 22 | 22 | 23 | 23 | 25 | 25 |
| 50 | 19 | 20 | 25 | 25 | 25 | 25 | 28 | 30 | 32 | 33 | 34 | 34 | 34 | 35 |
| 80 | 41 | 42 | 43 | 44 | 45 | 46 | 46 | 52 | 49 | 50 | 55 | 55 | 58 | 60 |
| 300 | 68 | 68 | 69 | 69 | 70 | 70 | 71 | 71 | 72 | 72 | 72 | 73 | 73 | 74 |
| 900 | 90 | 100 | 104 | 108 | 110 | 114 | 118 | 120 | 124 | 128 | 130 | 135 | 140 | 145 |

# Defense

This one is the tough part, and took me the longest to crack. How strong are the ship's energy defenses? It's a little tricky because it appears it's different depending on who manufactures the ships, but these charts work as an average.

| Length | 0D | 1D | 2D | 2D+1 | 2D+2 | 3D | 3D+1 | 3D+2 | 4D |
|--------|---------|---------|---------|---------|---------|---------|---------|---------|---------|
| 0 | 0/-/-/0 | 0/-/-/1 | 1/-/-/0 | 1/-/-/1 | 1/-/-/1 | 2/-/-/1 | 2/-/-/2 | 3/-/-/2 | 3/-/-/3 |
| 6.5 | 0/-/-/1 | 1/-/-/0 | 1/-/-/1 | 1/-/-/1 | 1/-/-/1 | 2/-/-/1 | 2/-/-/2 | 3/-/-/2 | 3/-/-/3 |
| 20 | 0/-/-/1 | 1/-/-/0 | 1/-/-/1 | 2/-/-/1 | 2/-/-/1 | 2/-/-/2 | 3/-/-/2 | 3/-/-/3 | 3/-/-/3 |
| 50 | 1/0/0/1 | 1/1/1/0 | 1/1/1/1 | 2/1/1/1 | 2/1/1/1 | 2/2/2/1 | 2/2/2/2 | 3/2/2/2 | 3/3/3/3 |
| 151 | 2/0/0/1 | 2/1/1/1 | 2/1/1/2 | 2/2/2/1 | 3/2/2/2 | 3/3/3/2 | 3/3/3/3 | 3/3/3/3 | 3/4/4/3 |

# System Strain

How much pounding can this ship's systems take? While on the surface this might seem like an FFG stat that has no WEG comparison, it actually ends up being a loose correlation to overall length. While there are exceptions, in general these ranges work:

| Length(m) | System Strain |
|-----------|---------------|
| 7.2 | 6 |
| 18 | 12 |
| 20 | 15 |
| 29 | 18 |
| 52 | 25 |
| 250 | 34 |
| 300 | 40 |
| 600 | 65 |
| 1200 | 80 |

# Rarity

I'm still working on this one, but my currently guess is it's a rough measure of Length to Cost, as in a factor of Price-Per-Meter.

# Sensors

How sensitive are the ship's scanners? While WEG has far more levels of granularity (notably the split between Passive, Active, Focus, and Search), FFG's Sensor Range mostly correlates as such:

| Sensor Range | Passive | Scan | Search | Focus |
|--------------|---------|---------|---------|---------|
| Short | 10/0D | 25/1D | 40/2D | 2/3D |
| Close | 20/0D | 40/1D | 80/2D | 4/2D+2 |
| Medium | 30/1D | 50/1D+2 | 70/2D+1 | 3/3D |
| Long | 40/1D | 75/2D | 150/3D | 5/4D |

# Weapon Number

In general, for Starfighter-scale weapons, the FFG Fire Linked rating is the number of WEG weapons -1.

| 2 weapons (fire-linked) | 3 weapons (fire-linked) | 4 weapons (fire-linked) | 5 weapons (fire-linked) |
|-------------------------|--------------------------|--------------------------|--------------------------|
| Fire-linked 1 | Fire-linked 2 | Fire-linked 3 | Fire-linked 4 |

# Weapon Damage

How much do the ship's weapons hurt? FFG's Damage X; Critical Y correlates pretty cleanly to WEG Weapon Damage, by scale class (Starfighter or Capital)

| Scale | 3D | 4D | 5D | 6D | 7D | 9D |
|-------------|----------------------|----------------------|-----------------------|-----------------------|-----------------------|-----------------------|
| Starfighter | Damage 3; Critical 5 | Damage 5; Critical 4 | Damage 5; Critical 3 | Damage 6; Critical 3 | Damage 7; Critical 2 | Damage 8; Critical 2 |
| Capital | Damage 8, Critical 5 | Damage 9; Critical 4 | Damage 11; Critical 3 | Damage 12; Critical 3 | Damage 13; Critical 2 | Damage 14; Critical 2 |

# Weapon Range

How far can the ship's weapons shoot? Again, WEG has more granularity but in general the range bands convert as such:

| Short | Close | Medium | Long |
|-------|------------|-------------|-------------|
| 1/3/7 | 1-3/12/25 | 1-10/25/50 | 3-15/36/75 |

# Fire Control

How much do the weapons assist in aiming? FFG does not have a stat for this, but in general it can be found as a function of its Range

| Range | Fire Control |
|--------|--------------|
| Short | 2D |
| Close | 3D |
| Medium | 3D+2 |
| Long | 4D |

\----------------

That's it! Please discuss, let me know if I'm missing anything major, and please help me update the formulas if they can be improved. I've tested them with over 120+ FFG stats to WEG, and they hold up pretty well. I'm working on a spreadsheet that does these calcs automatically as well, but that's for down the road.
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Mojomoe
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PostPosted: Mon Aug 20, 2018 2:05 pm    Post subject: Reply with quote

I'll add that the Reddit thread (after some thrashing) managed to post teh tables cleanly and makes for an easier read if you're referencing them!
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Whill
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PostPosted: Mon Aug 20, 2018 7:34 pm    Post subject: Reply with quote

Thanks, Mojo. It's infuriating to me that a system that is so incredibly more crunchy than D6 is also less granular. I have many FFG books but my eyes just glaze right over the stat blocks and mechanics. For me, the books are strictly for the fluff and art. I would not have the patience to convert, much less divine a conversion system. Cheers to you!

After you've gotten feedback and you tweak or refine anything that needs it, please consider formatting this system into a PDF document. I'd love to host it on the RP Library.
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