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Alfa Romeo RL & RM/Chassis Registry/Chassis/RM/12023
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== Technical specification and drivetrain configuration == Chassis 12023 is based upon the Alfa Romeo RM production chassis, using the standard 1,944 cc four-cylinder overhead-valve engine. The engine was modified to dry sump lubrication, presumably to accommodate steep gradients and lateral inclines encountered in mountainous terrain. The drivetrain incorporates: * Alfa Romeo 4-speed gearbox * Original RM transmission brake * Secondary transmission housing incorporating dual-range gearing * Propeller shaft driving rear track mechanism The track assembly is based upon the Kégresse-Hinstin system, manufactured under licence from André Citroën. A plaque mounted on the bogie reads: “Propulseur – Kegresse-Hinstin (Licence 48) André Citroën” Front wheel hubs display the Citroën gear motif. The Kégresse concept, developed by Adolphe Kégresse for Tsar Nicholas II, utilised flexible track systems to enable reliable travel over snow and soft terrain. ----
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