1914 TESTS OF THE LANGLEY "AERODROME" — ABBOT 113 



This list is given verbatim below. The Institution accepts Dr. 

 Wright's statement as correct in point of facts. Inferences from the 

 comparisons are primarily the province of interested experts and are 

 not discussed here. 



COMPARISON OF THE LANGLEY MACHINE OF 1903 WITH THE 

 PIAMMONDSPORT MACHINE OF MAY-JUNE, 1914 



LANGLEY, 1903 



1 Sizk: 11'6" X 22'6" (L. M. p. 206) 



2 Abea: 1040 sq. ft. (L. M. p. 206) 



3 Aspect Ratio: 1.96 



4 CAiiBtB: 1/12 (L. M. p. 205) 



5 Lb;Ai>iNG Edok: Wire 1/16" di- 



ameter (L. M. PI. 66) 



6 COVEBING 



nished. 



Cotton fabric, not var- 



7 Centeb Spab: Cylindrical wood- 

 en spar, measuring 1^" dia. for 

 half its length and tapering to 1" 

 at its tip. (L. M. p. 204) . Located 

 on upper side of wing. 



8 Ribs : Hollow box construction. 

 (L. M. Plates 66, 67) 



H AM MONDSPOB 1 , 1 1 4 

 WINGS 



Size: 10'11%" x 22'6" 



AREA : 988 sq. ft. 



Aspect Ratio : 2.05 



Camber: 1/18 



Leading Edge : Cylindrical spar 1%" 

 (lia. at inner end, tapering to 1" dia. 

 at outer end. 



Covering : Cotton fabric, varnished. 



Center Spar : Cylindrical spar about 

 ly^" dia. at inner end, tapering to 

 about 1" dia. at outer end. Located 

 on upper side of wing. This center 

 spar was reinforced (1) by an extra 

 wooden member on the under side of 

 the wing, which measured 1" x 11/2" 

 and extended to the 7th rib from the 

 center of the machine; and (2) by 

 another wooden reinforcement on 

 the under side extending out about 

 one-fourth of the length of the wing. 



Ribs: Most of the original Langley 

 box ribs were replaced with others 

 made at Hammondsport. (Manly 

 letter, 1914). The Hammondsport 

 ribs were of solid construction and 

 made of laminated wood. That part 

 of the rib in front of the forward 

 spar was entirely omittP<l. 



