Claim: The Turgo turbine is a hydro turbine designed in 1919 by Gilkes as a modification of the Pelton wheel, with an 87% efficiency
Evidence: Designed in 1919 by Gilkes as a modification of the Pelton wheel, the Turgo has some advantages over Francis and Pelton designs for certain applications. Operational Turgo Turbines achieve efficiencies of about 87%. The Turgo turbine is an impulse water turbine designed for medium head applications.