Chapter 7: Tonnage
Twenty yards of tonnage
The engine carries a tonnage rating. Loaded cars weigh more than empties, and the engine cannot move a cut heavier than its rating, so big pulls have to be broken up.
20 yards, pars from 3 to 8 moves. Beside its theme, chapter 7 draws on the shop, the helper and placard spacing, with two breathers of plain sorting and extra cars. Difficulty runs as a sawtooth: runs of easy yards, a spike, a breather.
The yards
| # | Yard | Par | The job |
|---|---|---|---|
| 1 | Yard 7.1 | 4 | Erie on 1, Dover on 2. Watch for an engine rated for 200 tons. |
| 2 | Yard 7.2 | 6 | Concord on 1, Dover on 2. Watch for cars that need the shop first. |
| 3 | Yard 7.3 | 5 | Boston on 1, Dover on 2. Watch for an engine rated for 180 tons. |
| 4 | Yard 7.4 | 5 | Boston on 1, Concord on 2. Watch for a helper on the far lead. |
| 5 | Yard 7.5 | 4 | Concord on 1, Boston on 2. Watch for an engine rated for 110 tons. |
| 6 | Yard 7.6 | 6 | The outbound Erie, Concord, Erie on Track 1, Dover on 2. |
| 7 | Yard 7.7 | 6 | Concord on 1, Erie on 2. Watch for an engine rated for 110 tons. |
| 8 | Yard 7.8 | 6 | Albany on 1, Dover on 2. Watch for cars that need the shop first. |
| 9 | Yard 7.9 | 8 | Erie on 1, Boston on 2. Watch for an engine rated for 140 tons. |
| 10 | Yard 7.10 | 4 | Boston on 1, Albany on 2, Erie on 3, Dover on 4. |
| 11 | Yard 7.11 | 4 | The outbound Boston, Boston, Dover on Track 1, Erie on 2. Watch for an engine rated for 170 tons. |
| 12 | Yard 7.12 | 7 | The outbound Dover, Dover, Concord, Dover on Track 1, Boston on 2. |
| 13 | Yard 7.13 | 8 | Boston on 1, Erie on 2, Concord on 3. Watch for an engine rated for 210 tons, cars that need the shop first. |
| 14 | Yard 7.14 | 4 | Albany on 1, Dover on 2, Concord on 3. |
| 15 | Yard 7.15 | 7 | The outbound Erie, Concord, Concord, Concord on Track 1, Boston on 2. Watch for an engine rated for 240 tons. |
| 16 | Yard 7.16 | 5 | The outbound Erie, Concord, Concord, Concord on Track 1, Albany on 2. Watch for a helper on the far lead. |
| 17 | Yard 7.17 | 8 | The outbound Albany, Dover, Dover on Track 1, Boston on 2. Watch for an engine rated for 180 tons. |
| 18 | Yard 7.18 | 3 | The outbound Boston, Dover, Boston, Dover on Track 1, Albany on 2. |
| 19 | Yard 7.19 | 7 | The outbound Erie, Dover, Dover, Dover on Track 1, Albany on 2. Watch for an engine rated for 90 tons. |
| 20 | Yard 7.20 | 7 | Boston on 1, Dover on 2, Concord on 3. Watch for an engine rated for 310 tons, cars that need the shop first. |
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