Langley, Samuel Pierpont, and Charles M. Manly. Langley Memoir on Mechanical Flight, Part I, 1887 to 1896, by Samuel P. Langley, Part II, 1897 to 1903, by Charles M. Manly. Smithsonian Contributions to Knowledge, XXVII, 3. Washington, [D.C.]: Smithsonian Institution, 1911

Two copies available: one has the following lineations: Marginal lineations [and notes]: Part I, Chapter I, “Introductory”, p. 1, regarding the ratio of horsepower to supported weight. Chapter II, “Preliminary: Experiments with Small Models”, pp. 8-9, regarding Alphonse Penaud’s theories of propeller and rudder designs; p. 7, Langley’s conclusion in Aerodynamics; p. 11, rubber-band models. Chapter III, “Available Motors”, p. 26, regarding compressed air motor; pp. 28-9, carbonic-acid fuel propellant. Chapter IV, “Early Steam Motors and Other Models”, pp. 38-9. Chapter V, “On Sustaining Surfaces”, p. 41 and 44, regarding wind pressure. Chapter VI, “Balancing the Aerodrome”, pp. 45-6, regarding lateral stability; 47, lift efficiency, [with “see p. 87 in margin]. Chapter VII, “History of Construction of Frame and Engines of Aerodromes”, p. 53, regarding supporting surfaces; pp. 68-9, steam engines; 77, Langley models’ sustaining surfaces. Chapter VIII, “History of Construction of Sustaining and Guiding Surfaces of Aerodromes 4, 5 and 6”, p. 80, regarding inability to theoretically determine the exact center of pressure. Chapter IX, “History of Launching Apparatus and Field-Trials of Aerodromes 4, 5 and 6”, p. 97, regarding center of pressure over center of gravity; p. 87, 1895 experiments; p. 107, Aerodrome #6; p. 108, Langley credited with first powered flight; p. 109, “Model Flight - November 28, 1896”. Chapter X, “Description of the Launching Apparatus and of Aerodrome Nos. 5 and 6”, pp.110-11, regarding aerodrome #5; p. 121, curvature of wings of aerodromes 5 and 6. Part II, Chapter III, “Experiments with Models”, p. 134, regarding launching; p. 137, speed of aerodrome #6. Chapter IV, “House-Boat and Launching Apparatus”, pp. 159-60, regarding launching-car struts; p. 161 [“Thrust” in margin]; p. 163, regarding final speed testing of the launching car. Chapter V, “Construction of Frame of Large Aerodrome”, p. 173-74, regarding frame jointing thimbles; pp. 178, 181-82, propellers; pp. 186-87, comparison of flying to riding a bicycle. Chapter VI, “Construction of Supporting Surfaces”, pp. 188-89, 190-192, 195-197, 199-200, 203-06, regarding plane crossrib configurations. Chapter VII, “Equilibrium and Control”, p. 207, regarding model equlibrium control; p. 208, regarding large aerodrome construction and how it should mirror Aerodromes 5 and 6; pp. 208-09, regarding center of pressure and center of gravity; p. 210, regarding model #5; pp. 211-12, regarding automatic equilibrium mechanisms; pp. 214-16, Penaud’s rudder control construction. Chapter VIII, “The Experimental Engine”, pp. 218-19, regarding Stephen M. Balzer’s rotary engine; p. 220 [“See Manly to Langley Sept. 18 and 25” and “Manly, takes over experiments”, in margin]; pp. 221-24, features of Langley engine. Chapter IX, “The Quarter-Sized Model Aerodrome”, pp. 226-28 [“Balzer” in margins, regarding Balzer’s engine]; p. 229, “Measurements of Thrust”; pp.230-33, regarding the quarter model engine; p. 233, [”Original Balzer cylinder head valves, crank, etc., with new steel cylinder walls”, in margin]. Chapter X, “Construction and Tests of the Large Engine”, pp. 234-35, cylinders; p. 236, regarding trouble with water jacket ring around cylinder; p. 238, connecting rods; p.239-40, crank shaft bearing and crank pin; p. 241. Manly takes credit for creating starting device shown in plates 78-80; pp. 245-46. Tucked at the end of the chapter, there are three leaves of handwritten notes comparing Wright and Manly engines. Chapter XII, “Field-Trials in 1903”, p. 255, “Propeller Thrust” and “Horse power motor” written in margin; p. 256, “Wright Pilot” written in margin; p. 258, “Launching device” written in margin; p. 265, description of the day of the aerodrome crash in 1903; p. 275, explanation for why this aerodrome crashed in 1903; pp.276-77, examination of the aerodrome after the accident; p. 283, Blénot’s aeroplane; p. 266, regarding Manly’s statements to the press after the 1903 aerodrome crash; p. 278, official report of U.S. Army Board of Ordnance, January 6, 1904 stating, “…the claim that an engine-driven, man-carrying aerodrome has been constructed lacks the proof which actual flight alone can give.” Appendix, “Study of the American Buzzard and the ‘John Crow’”p. 285, regarding Langley’s study of warping airfoils; p. 293, letter Langley wrote to Manly about birdflight (Jamaica buzzard) and the flying machine; pp. 297-8, curvature of wings.