ROR on CFN designs

Lets start simple and get more complex.

We will use TL 1 IU in a system with 1 asteroid belt
as a basis to compare everything else.


1 IU cost 30 Mc earns 1.21 Mc starting the next turn.

ROR = 1.21 Mc/30 Mc * 100 = 4.03% return on investment.

Since this is your home system and you will have room
to built 1500 IU (45,000 Mc).

A FT1: (AC)
Hx8(icIc)Qs 4/4
cost 56.4  maint 4.23  CFN income 7  ROR 4.91%

A FT2: (AC)
Hx11(Ic)(Ic)Qs 4/4
cost 78  maint 5.85  CFN income 10   ROR 5.32%

A FT3: (AC)
Hx15(Ic)(Ic)(Ic)Qs 4/4
cost 108.55 maint 8.15  CFN income 14  ROR 5.40%

A FT4: (AC)
Hx21(Ic)(Ic)(Ic)(Ic)Qs 4/4
cost 151  maint 11.33  CFN income 20  ROR 5.75%

Those were just simple ROR.


For a slightly more detailed look we need to adjust the cost
to reflect lost income for ships which take more than 1 turn 
to build.

So the cost of any ship is increased by 4.03% per turn of
construction time for the figuring of ROR only.
This is the income that you could have earned if you had 
bought IU instead of a FT.

1 turn of lost income
A FT2: (AC)
Hx11(Ic)(Ic)Qs 4/4
cost 78  maint 5.85  CFN income 10 
ROR = 4.15 / 81.2 * 100 = 5.11%

A FT3: (AC)
Hx15(Ic)(Ic)(Ic)Qs 4/4
cost 108.55  maint 8.15  CFN income 14
ROR =  5.85 / 112.93 * 100 = 5.18%

two turns of lost income
A FT4: (AC)
Hx21(Ic)(Ic)(Ic)(Ic)Qs 4/4
cost 151  maint 11.33  CFN income 20 
ROR = 8.67 / 163.42 * 100 =  5.31%

Now this still isn't full accurate.
Because these ships are being built in a SY.
And SYs cost Mc every turn to keep active.
Personnally I discount this because I am not going to 
mothball a SY if I can't fill it for a turn or 5.
But in the interest of a full detailed look at ROR 
I will do it including the cost of SYs.


1 turn build +4 Mc
A FT1: (AC)
Hx8(icIc)Qs 4/4
cost 56.4  maint 4.23  CFN income 7  
ROR  2.77 / 60.4 * 100 = 4.59 %

1 turn of lost income + 1.33 turns build
(don't forget to add 4.03% to the first turns 
SY charge)
A FT2: (AC)
Hx11(Ic)(Ic)Qs 4/4
cost 78  maint 5.85  CFN income 10 
ROR = 4.15 / 86.7 * 100 = 4.79%

1.5 turns of building
A FT3: (AC)
Hx15(Ic)(Ic)(Ic)Qs 4/4
cost 108.55  maint 8.15  CFN income 14
ROR =  5.85 / 119.10 * 100 = 4.91%

two turns of lost income, 2.5 turns of building
A FT4: (AC)
Hx21(Ic)(Ic)(Ic)(Ic)Qs 4/4
cost 151  maint 11.33  CFN income 20 
ROR = 8.67 / 173.91 * 100 =  4.99%

As the TL goes up, the ROR on IU improves
TL 1   4.03%
TL 5   5.50%
TL 10  7.33%

The ROR on FTs doesn't go up much unless you
are including lost income from turns of build and
SY costs, which go down as build rate improves.
But it will affect the ROR much less than the
TL multiplier does for IU.

In the LONG run, FTs are a worse investment
than IU, much less colonization.  By the time you 
reach TL 5, FTs are a bad investment, except for a
few for needed tasks like landing invasions, and
even then use the CFN and pay the loss penalty in cash.