sentences:  After the death of Renard in April 1905 Ferber's relationship with the authorities at Chalais-Meudon deteriorated and in June 1906 he asked for three years leave, in order to work at the Antoinette company.This was granted in August 1906, and he also allowed to continue his experiments at Chalais-Meudon.In 1906 Ferber built his aeroplane type VIII, fitted with a 24 hp Antoinette engine.