The 24 also received an entirely new rounded moulded plywood empennage incorporating a small fixed fin and a half-heart shaped rudder. Use of the new tail was delayed, and most production aircraft were of the Nieuport 24bis model, which reverted to the Nieuport 17 type tailplane and rectangular balanced rudder but was otherwise the same as the 24. The Nieuport 27 would use the new tail, along with a new split-axle undercarriage and internally sprung tailskid. The 24 retained the faired wood externally sprung tailskid used on previous types. A Le Rhône rotary engine was fitted in a spun aluminium cowl similar to those used on the late models of the Nieuport 17 and 23.