“PPM Technology”. Parry People Movers. 28 December 2017時点のオリジナルよりアーカイブ。30 June 2010閲覧。 “The rotating flywheel is a store of kinetic energy that is used to power the vehicle. ... flywheel allows the direct capture of brake energy ... A two-litre engine to transport fifty passengers. ... on board LPG-fuelled automotive engine is used.”
patents.google.com
W. H. Patton, Motor for Street Cars, アメリカ合衆国特許第 409,116号, granted Aug. 13, 1889.
“PPM Technology”. Parry People Movers. 28 December 2017時点のオリジナルよりアーカイブ。30 June 2010閲覧。 “The rotating flywheel is a store of kinetic energy that is used to power the vehicle. ... flywheel allows the direct capture of brake energy ... A two-litre engine to transport fifty passengers. ... on board LPG-fuelled automotive engine is used.”