The Aerodynamic Characteristics of Flaps

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WING CHOR, f C I °L 1 IoO f f EXTENDED CHORD t SINQLF_ , F'LAF :> i C ARC WITH AT CENTRE A O,B k, (C; l d ) 0.6 ,/ f IL~ CHOa~-- LINE f FLAP CHORD LINES ~" ~ CENTRE AT A ] 'ALL FLAP5 .'#J-) EXTENDED c 1 t L L \C~NT~ AT S 0 0"2 c-F/c' 0.4 O,G O,B FLAP CHORD / EXTENDED CHORD, FIG. 51 The function ~l(c/c'), all flaps. 1°0 • (C) : REDUCED FIG. 4. CHORD Sketches illustrating deri*Cation of effective (extended or reduced) chord.
3-0 2.O ' I / ~-- ¢/~= . i/ , / THIN AEROF01L / ~ t/c==0.2 THEORY" / f (a~--,z~) ---,./ 0-30 2.O X2(p) i-O /I // i .t/c-- o.l~ THiN AEROFOIL ~ ~ t:/"=0-30 THEORY 1 ~ ~ '~'tt ..... ,, ?/ // (O-1 N.A.C.A. SLOTTED FLAPS // (FLAP POSITION 15 OPTIMUM 1-0 U //./~~ \~PLIT FLAP5 i 2.O 0 ~0 ° ' 40" GO" FLAP ANGLE / ! THiN AEI~OF0~L THEORY (ao=a~ ! a CL : ~,(c¢/d) ;~2 (P) , t/¢ =O.2i "~.%. %. %. /// 7 ~ el.: k, (CflC') J,a(13) (.FULL 5PAN ) , . ~,,,I I /3 I 0 20 ° 40" GO" @O ° FIG. 6. FLAP AN~LE The hmction 2~(/~) for split and plain flaps. IOO ° I-0 # I i I " / (~) H.a SLOrTE~ FLAPS ( F;OXEDAL~A;LAHIpN~AEN 2LOS~TION '\ \ %, t o FIG. 7. 'O Q 4o ° GO ° 30 ° FLAP ANGLE The function ~2(/~) for slotted flaps,
Page 1 and 2: "'% ~ ~.:~1 _~ ~,-:~.~-,~ ~,~, L',t
Page 3 and 4: A Aspect ratio Lift-curve slope Not
Page 5 and 6: 1. Introductio~.--The invention of
Page 7 and 8: m Since the optimum slot shape is a
Page 9 and 10: In the case of a split flap set for
Page 11 and 12: Hence ACre' = AC,,, CLc --2 -- C ..
Page 13 and 14: here estimated for an aspect ratio
Page 15 and 16: partially retracted positions, the
Page 17 and 18: the type of chordwise lift distribu
Page 19 and 20: (2) With the arrangements illustrat
Page 21 and 22: Kruger's nose ftap is illustrated i
Page 23 and 24: Generally speaking, a lower surface
Page 25 and 26: 13.3. Maximum Lift Coefficient Incr
Page 27 and 28: formula for A C,,o is generally cor
Page 29 and 30: 14.10 Flaps on swept-back wlngs.--O
Page 31 and 32: Main TABLE 2 Characteristics of Hig
Page 33 and 34: BIBLIOGRAPHY No. Name 1 Alston :. .
Page 35 and 36: No. N~,lytg B IB L I OG RAPHY--cont
Page 37 and 38: No. Name 77 Wenzinger and Harris ..
Page 39 and 40: N~me Purser and Turner .... Davis .
Page 41: PLAIN WING . . . . WING WITH FLAP~
Page 45 and 46: 17"/C ---- O-'l~ / t/.. ,~ 0- 30 3.
Page 47 and 48: I*~- m I,O Zt, J I TAPER RATIO oo
Page 49 and 50: ,55 ° • 0"2 (o.~ BLACKBURN SLOTT
Page 51 and 52: NOSE FLAP (CL) ILLUSTRATION OF KRU(
Page 53 and 54: , +o.,~ +~1 t .A~/l I I F~A'~- . I.
Page 55 and 56: O,0~5 - - ~ I O RECTANGULAR WINrm X

The Aerodynamic Characteristics of Flaps

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