NO. 8 I914 TESTS OF THE LANGLEY "aERODROMe" ABBOT 



POWER PLANT. 



27 Motor : Langley 5 cylinder radial. 



28 Ignition : Jump spark with dry 

 cell batteries. (L.M. p. 262). 



29 Carburetor : Balzer carburetor 

 consisting of a chamber filled with 

 lumps of porous cellular wood 

 saturated with gasoline. The air 

 was drawn through this wood. 

 There was no float feed. (L.M. 

 P- 225). 



30 Radiator : Tubes with radiating 

 fins. 



31 Propellers: Langley propellers 

 (L.M. pl.S3, pp. 178-182). 



Motor: Langley motor modified. 

 Ignition : Jump spark with magneto. 



Carburetor: Automobile type with 

 float feed. 



Radiator: Automobile radiator of 

 honeycomb type. 



Propellers : Langley propellers modi- 

 fied "after fashion of early Wright 

 blades". 



LAUNCHING AND FLOATS. 



32 Launching: Catapult 

 on a houseboat. 



mounted 



33 Floats : Five cylindrical tin 

 floats, with conical ends, attached 

 to underside of main frame at ap- 

 propriate points, and about six 

 feet above lowest part of machine. 



Launching: Hydroplanes, developed 

 1909-1914, attached to the machine. 



Floats : Two wooden hydroplane 

 floats, mounted beneath and about 6 

 feet to either side of the center of the 

 machine at the lateral extremities of 

 the Pratt system of trussing used for 

 bracing the wing spars of the forward 

 wings ; and one (part of the time two) 

 tin cylindrical floats with conical ends, 

 similar to but larger than the Lang- 

 ley floats, mounted at the center of the 

 Pratt system of trussing used for 

 bracing the rear wings. All of the 

 floats were mounted from four to 

 five feet lower than the floats of the 

 original Langley, thus keeping the en- 

 tire machine above the water. 



WEIGHT. 



34 Total Weight: With pilot 850 Total Weight: With pilot, 1170 

 pounds (L.M. p. 256). pounds. 



35 Center Gravity : 3/8" above line Center Gravity : About one foot be- 

 of thrust. low line of thrust. 



