1. Aerodynamic Loads and Moments on Axisymmetric Ring-Wing Ducts
2. WerleM. J. “Aerodynamic Loads and Moments for Ring Wing Ducts,” Ogin Energy Corp. Rept. Ogin-0060, Waltham, MA, Sept, 2013.
3. FletcherH. S. “Experimental Investigation of Lift, Drag and Pitching Moment of Five Annular Airfoils,” NACA TN 4117, 1957.
4. RyallD. L.CollinsI. F. “Design and Test of a Series of Annular Airfoils,” Admiralty Research Lab. Rept. A.R.L./R3/G/AE/2/5, ARL/G/R6, Teddington, England, U.K. March 1965, https://reports.aerade.cranfield.ac.uk/handle/1826.2/4069.
5. MorganW. B.CasterE. B. “Prediction of the Aerodynamic Characteristics of Annular Airfoils,” David Taylor Model Basin Rept.1830, Carderock, MD, Jan. 1965, http://hdl.handle.net/1721.3/49012.