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Screw Propeller
Screw Propeller NTW
Prerequisite Steam Ship Propulsion
Research Points Needed 500
Building Needed Steam-Powered Factory
Leads To
Stream Industrial
Effects
Screw Propeller is an industrial technology in Napoleon: Total War.

DescriptionEdit

A screw propeller drives a ship through the water, powered by steam and independent of the wind.

Unlike a paddlewheel, a screw propeller is entirely underwater, and is largely invulnerable to enemy fire as a result. However, it does add to the draft of a ship, so a pilot must have his wits about him in shallow water. The mechanism is, however, far more efficient than any combination of paddlewheels (either stern or side), and can drive a ship at much higher speed for a given engine size.

Historically, the screw propeller had its origins in Archimedes’ Screw, an ancient method of lifting water to a higher level. The screw’s potential for propulsion was recognised early on, but not actually implemented. It required steam power, coupled with further refinements to the shape of the screw propeller, to finally see it adopted instead of paddle wheels. British engineer Francis Pettit Smith (1808-1874) accidentally discovered that smaller propellers work better than big ones. During one of his many tests, a piece of his screw propeller snapped off, and he noticed that, rather than grinding to a halt, the ship actually accelerated.

General InformationEdit

While researching Screw Propeller always guarantees access to 38-gun Steam Ships and 80-bun Steam Ships, Ironclads additionally require Iron Plating, an end-game military technology, to be researched before they may be built.

Napoleon: Total War Technology
Civil Abolition of SlaveryClassical EconomicsCode NapoleonDialecticsMetric SystemNational CensusNational DebtNational PropagandaPassportsPublic SchoolingSemaphore LinesTrade Unions
Military Army Corps OrganisationCarcass ShotCarronadeConscript Infantry TacticsConscriptionDiamond FormationField AmbulancesFire and AdvanceGeneral StaffGrand BatteryImproved CopperingIron PlatingLogisticsMass MobilisationModern RiflesPercussion CapQuicklimeRifled CannonsRocketsStandardised ArtilleryTop GallantsUniform Armament
Industrial Bottling and CanningDivision of LabourInterchangeable PartsJoint Stock CompanyLand DrainageLimited Liability CompanyMass ProductionPlatewaysPoverty Control LawsScrew PropellerSteam EngineSteam LocomotiveSteam Ship Propulsion
Peninsular War Civil Abolition of the InquisitionAfrancescado PropagandaAnti-French PropagandaAnti-French SentimentBonapartist PropagandaCádiz CortesCitizen Recruitment InitiativesColonial FundingComplete AnnexationNational FervourRepressive Measures
Peninsular War Military Advanced Guerrilla TrainingBritish Training MethodsCall to ArmsCounter-guerrilla InitiativesFrench Cipher DecryptionGuerrilla Training NetworkLocal GuidesLocal Recruitment InitiativesPartisan MusketsThe Great Paris Cypher

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