Let us compare the disposable units:
Ship | Cap | Damage | Notes |
Autobomb | 96 | 16,200 x 10 | |
Nanoswarm | 96 | 3,240 x (Mk + 1) * 2 | Lots of status effects |
Youngling Firefly | 96 | 7,480 per shot / 2,480 DPS | Explodes for AOE: Avg 18,750 x 20 |
Spire MiniRam | 20 | 780,000 | Large Targets only |
Railpod | 192 | 9,360 x 2 | Kill self after 2 shots, infinite range |
A single Railpod is as good as:
1 Autobomb hitting 1 target (1/10 max).
1 Nanoswarm hitting 6 targets (1.5x max).
1 Firefly AOE hitting 1 target after shooting 10 times (1/2 max), OR
1 Firefly AOE hitting 10 targets (1/2 max) after firing zero times.
Railpods have twice the cap of these other units, so you can double the equivalent:
1 Autobomb hitting 2 targets (1/5 max),
1 Nanoswarm hitting 12 targets (3x max),
1 Firefly AOE hitting 1 target after shooting 20 times (max), OR
1 Firefly AOE hitting 20 targets (max) after shooting zero times.
In other words:
Right now the Railpod's only clear advantage is the infinite range.
In terms of damage, it does 1/5 the damage of the Autobomb, about three times the average case for the Nanoswarm but without special effects, and 1/10 to 1/5 the Firefly's AOE.
Damage wise, it is lacking compared to the other disposable units.
The number of units that can be produced per second is dependent on the performance profile. Testing shows Insane can produce about 5/sec, while Extremely Low is only about 1.66/sec. Average gives a middle case of 3/sec, so we'll proceed with that.
In terms of purely practical performance, an MSD can produce 3 Railpod/sec, and you can have 9 MSDs cap.
Second 1 = 3 x 9 x 9360 damage = 252,720
Second 2 = 3 x 9 x 9360 damage = 252,720
Second 3+ = Second n-2 units fire again and die, second n units produced = 2 x 3 x 9 x 9360 = 505,440
...
505,440 DPS to anything vulnerable to Sniper Shots.
What is a practical 505,440 cap DPS is very high for a fleetship. It also has 6x multipliers against Close Combat, Light, Medium, and Polycrystal. That's about 30% of units, including most Guardians and several Guardposts. Against those, you get over 3 million DPS sustained.
It's DPS/resource cost (improved in 6.041) is higher than most fleetships, even compared to the other disposables.
Autobomb practical cap-DPS = 3 * 9 * 16,200 * 10 = 4,374,000 (requires 10 targets); 2,187,000 DPS in the average (5 target) case.
Nanoswarm practical cap-DPS = 3 * 9 * 3,240 * 4 = 87,480 (4 targets) + lots of status effects.
Firefly AOE practical cap-DPS = 3 * 9 * 37,400 * 20 = 20,196,000 (20 targets and fired 20 shots) (unattainable)
More common Expected case (2 shots and 10 shots) = 1,009,800 DPS. (2 shots = 3 seconds = less than cap spawn time - attainable)
Minimal case, avg (10) targets, zero shots = 504,900 DPS. (Instant suicide, below minimum expected)
Note for completion:
Theoretical cap DPS is 192 * 9360 = 1,797,120 DPS. Normal calculations would suggest half that (2 second reload) = 898,560, but testing showed that produced Railpods will fire the same second they are produced (even before the new unit has fully appeared).
In the case where you could produce 192 units per second, you see'd:
Second 1, all 192 be produced and fire = 1,797,120 damage.
Second 2, nothing.
Second 3, all 192 fire, die, be reproduced, and fire = 2 x 1,797,120 = 3,594,240 damage.
Second 4+ repeat.
This equals 1,797,120 DPS.
However, a single HW game cannot produce more than 87 Railpods per second (20 space docks, 9 MSDs, 3/sec each), while it would require 96 Railpods/sec replacement to attain full cap-DPS.
87/sec replacement = sustained 174 x 9360 = 1,628,640 DPS. This is 5x-6x most starships. This is also 8,700 m+c/sec. Comparison: An Armored Golem is 1,040 m+c/sec for 2,500,000 DPS.
Under high performance profiles, it may be possible to produce maximum DPS.
At max DPS, you can sustain a little over 100 seconds of production from max resources, giving close to 200,000,000 damage over that time period.
All in all, under ideal defensive circumstances, it can be VERY powerful, and VERY expensive. However, on offense where production is limited to the MSDs, the max DPS is greatly reduced, to 30% or so.
This means the Railpod is a defensive spam unit for converting resources into damage on certain high-production worlds. On offense, they require MSDs and provide no more than mediocre sniper support. Not bad, but neither do they excel there.
But on defense... Impressive.