;:16 INDEX VOL. 27 



Models — continued page 



launching of (sec also launching apparatus) 92-122, 133, 134 



rubber-driven 5, 8-24, 76 



steam driven (see also Nos. 4, 5, 6) 134, 135 



steam, motor, and other 30-40 



Motive-power (see also engines, electricity, and fuel) 8, 11, 21-29, IIS 



discussion of H 



Motors, available (see also engines) 11, 21-29, 278 



carbonic-acid gas 11, 24, 26, 28, 29, 39, 53, 54 



compressed air 11. 24, 25, 26, 68, 112, 113 



construction of early types of 30-40 



electrical 24, 26, 27, 212, 262, 263 



gas 26, 28, 37, 131, 137 



gasoline 24, 37, 65, 125, 131, 179, 210, 218, 219, 224, 277 



gunpowder 24, 25 



hot-water 24, 25, 68 



rubber 5, 8-24, 76 



steam 24-25, 30-40 



weight of (see also weight of engines) 116, 126, 130, 209, 247, 250 



Mount whitney, observations on 123 



N 



Nash, Dr. F. S 276 



National Museum, models in • '82 



Needle-valve 5,; - : " ■ u _ :) 



Nitric acid, use of " 



Nomenclature of parts of aerodrome 1 4 ■ 1 J 



O 



Oiling systems 113, 177, 234, 239. Jin 



Open wind, experiments in 42, 99, 257, 271, -.- 



Ordnance and Fortification (sec Board of). 



Oxygen, necessity of 72 



P 



Paper covering for rudder 86, 10o 



I Ynaud, Alphonse, toy aeroplane designed by 7-9, 21, 22, 40 



tail or rudder.... 8, 12, 13, 50, 51, 79, 82, L07, 122, 130-147, 151, 152, 153, 209, 211, 213. 214, 



216, 253, 264, 270-272 



•• Pendulum" test for lift 60. 61, 66, 94, 131, 135, 211, 212, 214, 232 



Percaline for wing covering 1 9 ^> I 95 



Pinion (see gears). • 



Piston (see engines and cylinders). 



Pitch of propellers 63 > 69 - 7fi - 94 > lsl 



Plane (see also wings and surfaces). 



dropper 



surface, angle of inclination of 6. 8. *l-45, Gl, 83, 97, 99, 100 



velocity required to sustain 1> * 3 > n "' "''' 



eting Of wings 8*. 86, 100, 195, 203 



mac River, location of tests on 



Power (se, also steam, fuel, and electricity 1. 



development of ' '" 



formula for m J5 



generating apparatus ' "" 



relation to area and weight 



r-gauge (see dynamometer). 



II, Major O. II., recorder -'"• -'^' "^ 



Press, attitude of " ' " ' 



report to. Mr. Langley's " .i'. '266-267 



Pressure center 0/' ^ ^ . ". ". *. ". '.7,* lo'/ii,' 13,15, 15-52, 64, IS. 80, 84, 87, 88, 90, 91, 200, 209, 210 



S,:::S, r ::: : "»*£&&*„?££ 



steam 24, 30-40, 53-59, 63-75, L01, 114, 117, 134. 135, 137, 141, 142, 149, 150 



