Nieuport 23 (Nieuport)

Nieuport 23, possibly with No.1 Squadron, RFC in 1917 Lou Larson Collection.
Wikipedia

The Nieuport 23 was largely the same as the definitive 17, differing mainly in the use of a different machine gun synchronizer. The gun was offset to starboard, the fuel and oil tank arrangement and the center section rigging were changed to suit. Nieuport 23s were operated by both French and British squadrons alongside Nieuport 17s until their replacement by the later Nieuport 24, 24bis and 27.

The more powerful 130 hp (97 kW) Clerget 9B nine-cylinder rotary engine was used by the Nieuport 17bis, which first appeared late in 1916. The N.17bis had stringers fairing out the fuselage sides compared to the flat sides on the 17. The major user was the British Royal Naval Air Service, which ordered 32 from Nieuport, 50 more being licence-built by the Nieuport & General Aircraft Company. Heavier than the preferred Le Rhône, output from the Clerget rotaries quickly fell below their rated power and the performance of the 17bis suffered accordingly. Armament often included a synchronised Vickers gun with the standard over-wing Lewis. Related to the 17bis, the Nieuport 23bis combined the aerodynamic improvements of the 17bis but reverted to the Le Rhône. Few were built and the Royal Naval Air Service may have been the sole operator. Wikipedia

Nieuport 23