Table 2. Masses (m) and volumes (V) for the virtual and physical model components.
| Virtual | Physical | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Baculite model |
VPLA (cm3) |
mPLA (g) |
VBi (cm3) |
mBi (g) |
mwd (g) |
mtotal (g) |
Mass def. (g) | mPLA (g) |
mBi (g) |
mglue (g) |
mwd (g) |
mtotal (g) |
Mass def. (g) |
| 1 | 124.319 | 155.275 | 5.651 | 52.490 | 212.209 | 207.765 | 4.444 | 157.875 | 49.737 | 0.101 | 212.209 | 207.713 | 4.496 |
| 2 | 130.978 | 163.592 | 4.437 | 41.211 | 212.209 | 204.803 | 7.406 | 162.205 | 42.518 | 0.207 | 212.209 | 204.930 | 7.280 |
| 3 | 126.935 | 158.542 | 2.018 | 18.745 | 212.209 | 177.287 | 34.922 | 158.529 | 18.612 | 0.355 | 212.209 | 177.496 | 34.713 |
| 4 | 152.102 | 189.975 | 2.453 | 22.789 | 212.209 | 212.764 | −0.555 | 187.063 | 24.875 | 0.206 | 212.209 | 212.144 | -0.5* |
Note:
1: Nautilus-like cruising thrust; 2: Nautilus-like cruising thrust scaled by the higher mantle cavity ratio of Sepia; 3: Nautilus-like peak thrust; 4: Slightly negatively buoyant. PLA = 3D printed plastic; Bi = bismuth counterweight; wd = water displaced; Mass def. = mass deficiency required to impart the computed buoyant forces (Table 3); glue = the cyanoacrylate glue used to secure each counterweight. The residual mass in the negatively buoyant experiment (denoted with *) was not weighed, but rather its volume was inserted into the model with a syringe (~0.5 cm3).