Three improved Henri Farman H.F.3 (Type 1911) were ordered and delivered in 1911. The "Type 1911" was an improved version of the H.F.3 design incorporating a larger fuel tank and rounded vertical control surfaces. These three aircraft delivered on May 24th 1911 and 7 and 13 August 1911, received the registrations Farman II, III and IV, which can create confusion as in France roman numbers are often used to indicate the Farman sub-types. As of 1912 all remaining Farman H.F.3's will be known as "Farman Ecole".