{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.tank-locomotive","code":"thing-q785745","url":"https://ver.cy/models/thing/q785745/","name":"tank locomotive","alternateNames":["kkStB 4.0","OSE class Z","CGR Fairlie 0-6-6-0","CCFPP 1 and 2","NZR B class","NZR E class","NZR R class","NZR S class","LNER Class Y1","CBR 30 to 34","CEN 46 to 49 and 51","Ateliers métallurgiques Ct"],"kind":"thing","status":"published","version":"0.2.0-wave.3","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.OBJ"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A steam locomotive that carries its own fuel and water in tanks and bunkers mounted on the locomotive frame rather than in a separate tender, in forms such as side tanks, saddle tanks, pannier tanks and well tanks, and articulated types such as the Fairlie, built for shunting, suburban, branch line and industrial service worldwide, with examples from the Austrian kkStB 4.0, the New Zealand B and E classes, the Cape Government Railways Fairlie 0-6-6-0 to the Greek OSE class Z; tank locomotives were widespread on narrow gauge and preserved railways.","purpose":"Let an agent explain tank locomotives and their types, relay design, uses and notable classes from railway history sources, describe preservation, and distinguish tank locomotives from tender locomotives.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Onboard water and fuel","Bidirectional running","Short-range service","Many tank layouts"],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"What a tank locomotive is.","layers":[{"id":"definition","name":"Definition","description":"Definition and types.","findings":[{"id":"definition-finding","name":"Definition","description":"Definition.","questions":[{"text":"What is a tank locomotive, and how do side, saddle, pannier and well tanks differ?","kind":"definition"},{"text":"Is the question about tank locomotives in general, a specific class or a tender locomotive?","kind":"boundary"}]}]},{"id":"design","name":"Design","description":"Design trade-offs.","findings":[{"id":"design-finding","name":"Design","description":"Design.","questions":[{"text":"Why were tank locomotives chosen for shunting and suburban work, and what limited them?","kind":"definition"},{"text":"Which entry fits the specific layout?","kind":"action"}]}]}]},{"id":"classes","name":"Classes","description":"Notable classes.","layers":[{"id":"examples","name":"Examples","description":"Examples.","findings":[{"id":"examples-finding","name":"Examples","description":"Examples.","questions":[{"text":"What were the kkStB 4.0, NZR B and E classes, the CGR Fairlie 0-6-6-0, CCFPP 1 and 2 and OSE class Z?","kind":"provenance"},{"text":"Which entry fits the specific class?","kind":"action"}]}]},{"id":"articulated","name":"Articulated","description":"Articulated tanks.","findings":[{"id":"articulated-finding","name":"Articulated","description":"Articulated.","questions":[{"text":"How did Fairlie, Garratt and Mallet tank designs work?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]}]},{"id":"preserve","name":"Preserve","description":"Preservation.","layers":[{"id":"heritage","name":"Heritage","description":"Heritage railways.","findings":[{"id":"heritage-finding","name":"Heritage","description":"Heritage.","questions":[{"text":"Where are tank locomotives preserved and operated?","kind":"provenance"},{"text":"Which sources are cited?","kind":"provenance"}]}]},{"id":"operation","name":"Operation","description":"Operation and safety.","findings":[{"id":"operation-finding","name":"Operation","description":"Operation.","questions":[{"text":"How are preserved tank locomotives maintained and inspected?","kind":"provenance"},{"text":"Which entry fits heritage railway?","kind":"action"}]}]}]},{"id":"context","name":"Context","description":"History and culture.","layers":[{"id":"history","name":"History","description":"History.","findings":[{"id":"history-finding","name":"History","description":"History.","questions":[{"text":"How did tank locomotives develop from early designs to their decline with dieselisation?","kind":"provenance"},{"text":"Which entry fits the history of steam locomotives?","kind":"action"}]}]},{"id":"culture","name":"Culture","description":"Culture.","findings":[{"id":"culture-finding","name":"Culture","description":"Culture.","questions":[{"text":"How do tank locomotives appear in culture, such as Thomas the Tank Engine?","kind":"provenance"},{"text":"Which entry fits Thomas the Tank Engine?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Explain tank locomotive layouts such as side, saddle, pannier and well tanks, citing railway history sources.","Identify a preserved tank locomotive from its class and builder records.","Report the condition of a locomotive to the preservation group that keeps it."],"mustNot":["Operate a steam locomotive without the qualified crew and boiler certification its railway requires.","Report a boiler as fit for steaming without a valid inspection.","Move a locomotive on a running line without authority from the railway operator.","Remove parts or fittings from a preserved locomotive without the owner's consent."],"requiresHuman":["Approving a steam locomotive for passenger service after overhaul."]},"ethics":{"considerations":["Steam boilers store dangerous energy; failures have killed crews and bystanders.","Preserved locomotives are shared heritage kept by volunteers and trusts."],"affectedParties":["Crews and volunteers","Passengers and spectators","Heritage railway owners"]},"owners":{"steward":"The owner of the locomotive, often a heritage railway or trust; the railway safety authority licenses its operation.","roles":[],"masterSystems":["Heritage railway and rolling stock registers"]},"relations":[{"target":"Q171043","type":"parent","note":"registry parent class"},{"target":"steam locomotive","type":"related","note":"in registry terms"},{"target":"tender locomotive","type":"related","note":"which tows a tender"},{"target":"shunting","type":"related","note":"and suburban service"},{"target":"heritage railway","type":"related","note":"lines worldwide"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.tank-locomotive","Wikidata: Q785745 (https://www.wikidata.org/wiki/Q785745)"]},"properties":{"applicability":"required","items":["typical water capacity: about 2000-10000 litres","wheel arrangements: from 0-4-0T to 2-8-4T and articulated range"]},"recognition":{"applicability":"required","items":["Steam locomotive with onboard tanks","Side, saddle, pannier and well tanks; Fairlie and other articulated tank types; classes such as kkStB 4.0, NZR B and E, OSE class Z","Tender locomotives tow a separate tender; diesel and electric locomotives are not steam","A steam locomotive with water tanks beside or over the boiler and a coal bunker behind the cab."]},"capabilities":{"applicability":"required","items":["explain types and design","relay uses and classes","describe preservation","distinguish from tender locomotives"]},"hazards":{"applicability":"required","items":["Limited range from small tanks","Boiler safety in preservation","Confusing tank layouts and classes"]},"interfaces":{"applicability":"required","items":["Historical railway engineering standards","Boiler inspection rules for preserved locomotives","Heritage railway safety regulation"]},"context":{"applicability":"required","items":["Hauling trains without a tender.","side tank locomotives","saddle tank locomotives","pannier tank locomotives","well tank locomotives","articulated tank types such as Fairlie, Garratt and Mallet tanks","industrial and narrow gauge tank locomotives","notable classes such as kkStB 4.0, NZR B class, NZR E class, CGR Fairlie 0-6-6-0, CCFPP 1 and 2, OSE class Z"]}},"sources":[{"title":"Wikidata item Q785745: tank locomotive","url":"https://www.wikidata.org/wiki/Q785745","note":"identity and sense of the item"},{"title":"Wikipedia: Tank locomotive","url":"https://en.wikipedia.org/wiki/Tank_locomotive","note":"general description of the item"}],"openQuestions":["Should saddle tank and Fairlie locomotive be separate primary entries?","How should railway history sources be linked?","The registry entry has merged aliases naming specific classes; should they be split off?"],"resources":{"spec":"/models/things/publications/thing-q785745/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q785745/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-13T04:13:24Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-06T19:52:02+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}