I'm trying a new RP-0 career (using airplanes for the first time) and am getting some inconsistent masses for the starting cockpits:
Cockpit
UI Mass
Actual Mass
Delta
Bonanza
0.3331
0.733
0.4
DHC-3
0.7065
1.107
0.4
He-111
0.6024
0.802
0.2
Ju-87
0.4024
0.602
0.2
UI Mass is from the tooltip, Actual Mass is from the Engineer's Report / Mechjeb (with default resources), Delta is the difference after rounding the UI Mass to 3 significant digits.
The masses in the RO config files match the UI Mass (if you remove all the default resources).
What's causing the extra 0.4 / 0.2 mass?
(edit) Looking at the crew capacities, the two cockpits that have an extra .2 mass have a crew capacity of 2, and the other two have a crew capacity of 6. Is the extra mass added to simulate the crew?
(edit 2) So I realized that each crew member adds .1 mass. The 2-capacity cockpits have 2 crew, and the 6-capacity cockpits have 4 crew with a new career (since you start with 4 active Kerbals). In other words I'm bad and I should feel bad
Damn your realism causing me to launch unmanned probes all this time XD