When you are customizing a mech in MegeMekHQ and looking at the times and modifiers it is very easy to get shocked by the difficulty and durations. So, here are a few of the things going on and bugs I have identified.
1. All times are calculated using one action each (ie remove an item takes time/activity and installing an item takes a second time/activity)
2. MegaMekHQ uses several house rules...
Simple modification:
Replace LRM-10 in Wyvern CT with a Large Laser and remove @LRM-10 and replace with heat sink.
If all of the swaps are done into exactly the same criticals and the new weapons/equipment are added to the mech before removing the original criticals, MegMekHQ will calculate a correct-ish time and refit class.
According to MegaMekHQ We have 2 class B refit actions:
A. Removing the LRM-10 ammo and replacing it with a heatsink (120 minutes to remove the ammo and 90 minutes to add the heat sink)
B. Removing the LRM-10 and replacing it with a large laser (120 minutes to remove the LRM-10 and 120 minutes to install the large laser)
Total time is 450 minutes times 2 for a customization for 900 minutes
Difficulty TN is 11 for regular techs (TN 7+) in a DropShip (+0) with a refit class B modifier of +1, tech/quality modifier of +1, and customization modifier of +2
Analysis: This modification should be a Class C Refit because adding a heat sink is explicitly a Class C mod. MegaMekHQ is treating adding the heat sink as a Class B refit replacing a piece of weapon/equipment with another of <= size instead of the Class C adding a heat sink refit. The actual TN should be 12 for regular techs with a time of 450 minutes doubled for Class C Refit and doubled again for customization for a total of 1800 minutes (3.75 Days).
Common modification:
Double Heat Sinks
Refitting the Wyvern again.
MegaMekHQ seems to be calculating the times based on 540 minutes to install each DHS (after you install them, the number is wrong until all of the out of engine DHS are placed.)
Remove 12 SHS (90 minutes * 3 (Class D refit) * 2 Customization = 540 minutes) for 6,480 minutes
Add 12 DHS (90 minutes * 3 (Class D refit) * 2 Customization = 540 Minutes) for 6,480 minutes
Total 12,960 minutes (27 Days)
Refit TN is 12 for Regular tech (TN 7+) in a DropShip (+0) with Class D modifier +2, tech/quality modifier +1, and customization modifier of +2
Analysis: Until all of the DHS are placed, the displayed time number is wrong.
Note that occasionally MegaMekHQ does not increment time up or down correctly with adding/removing items. Always check that time/TNs change appropriately.
Author
Topic: Understanding some of the quirks of MegaMek's Refit calculations (Read 771 times)