A discussion is presented of the type of control manipulation and various techniques that may be required for satisfactory spin recovery of contemporary fighter designs. The effects in spins of jet-engine installations and the effectiveness of canard surfaces in alleviating a directional divergence near the stall and subsequent spin entry on one configuration are also discussed.NACA Research Memorandum L55L23A."March 19, 1956."Title from cover.Includes bibliographical references (p. 6).A discussion is presented of the type of control manipulation and various techniques that may be required for satisfactory spin recovery of contemporary fighter designs. The effects in spins of jet-engine installations and the effectiveness of canard surfaces...