Measurement of flying qualities of the Douglas A-26B Invader (AAF No. 41-39120) I : Longitudinal stability and control characteristics Langley Research Center - 1944   Download - Flying qualities of the Douglas A-26B

	Ditching Tests with a 1/12-Scale Model of the Army A-26 Airplane in Langley Tank No. 2 and on an Outdoor Catapult. Tests were conducted in calm water in Langley tank no. 2 and in calm and rough water at an outdoor catapult in order to determine the best way to make a forced landing of an Army A-26 airplane and to determine its probable ditching behavior. These tests were requested by the Air Materiel Command, Army Air Forces, in their letter of March 26, 1943, WEL:AW:50. Langley Research Center; NACA - March 06, 1947     Download - Ditching Tests with a 1/12-Scale Model of the A-26 Invader

	Comparison of Wind-Tunnel and Flight Measurements of Stability and Control Characteristics of a Douglas A-26 Airplane Tests in Langley pressure tunnel of model XA-26 bomber were compared with those of A-26B (twin-engine attack bomber) and showed that static longitudinal stability, indicated by elevator-fixed neutral points, and variation of elevator deflection in straight and turning flight were good. Airplane possessed improved stability at low speeds which was attributed to pronounced stalling at root of production wing. At rudder-force reversal at speeds higher than those in flight tests, agreement in rudder-fixed and rudder-free static directional stability was good. Hinge moment obtained at zero sideslip was satisfactory for determining aileron forces in sideslip. Langley Research Center; NACA -  March 1946     Download - Wind-Tunnel and Flight Measurements 1 Download - Wind-Tunnel and Flight Measurements 2 Download - Wind-Tunnel and Flight Measurements 3

	Pressure distribution measurements on various surfaces of a 0.2375-scale model of the Douglas XA-26 airplane in the 19-foot pressure tunnel Langley Research Center - 1943    Download - Pressure distribution measurements on various surfaces of the Douglas XA-26 airplane in the 19-foot pressure tunnel

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