The arithmetic of distribution in multi-cylinder engines Stanwood S. Sparrow naca-tn-162 October, 1923 (no abstract available) An Adobe Acrobat (PDF) file of the entire report: http://naca.central.cranfield.ac.uk/reports/1923/naca-tn-162.pdf Stanwood S. Sparrow; The arithmetic of distribution in multi-cylinder engines; naca-tn-162; October, 1923