It's the L.W.F. model V – Tractor
The L.W.F. Model V Tractor is a single-engine two-seat trainer and reconnaissance biplane aircraft produced by the American manufacturer L.W.F. Engineering Company, (Lowe, Willard, Fowler).
This two-seat training and observation airplane was built as a prototype in 1916, and went into production for the US army a year later. The LWF Model V is a biplane, powered by a V-8 engine. The fuselage is a plywood, cantilever, semi-monocoque construction. The entire hull is covered in fabric, impregnated with several layers of cellulose lacquer. The wings are swept parallel construction; the upper wing has a greater span than the lower. The four independent wings of the wooden biplane are covered with fabric. The entire two-compartment braced system is reinforced with steel wire. The tail surfaces are formed of welded steel tubes and covered in fabric.
The aircraft's flight characteristics were not the best, so it was used in the US army primarily for secondary tasks.
The LWF Model V has special significance for Czech history - it was used by the air force branch of the Czechoslovakian legion in Russia.