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ORIGINALLY ISSUED Januwy 1941 a8 &hanee -eport C H 5 R A C T w I S T I C S O F NACA 44OOR SERnS RECTli!?GDLPJ;I AVD TPSERED AIRFOIXS, DICLUDlNG THE EFFECT O F SPIST FLAPS By Harry Greenbere Langley Memorial Aeronautical Laboratory Langley Field, Va.
f NACA WARTIME REPORTS are reprints of papers originally issued to provide rapid distribution of advance research results to an authorized group requiring them for the war effort. They were pre - viously held under a security status but axe now unclassified. Some of these reports were not teeh- nically edited. All have been reproduced without change in order to expedite general distribution.
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By Iiarr; G r e e n b e r g A t :;Lie r e a c e s t o f t:ie E x r e a u o f A e r o m . i l t i c s , Mavy I?eTartze::t, t e s t s % e r e n a d e i n i c e v a r i a b l e - d e n s i t y F i n d t u n n e l 0 2 a t a r e r e d w5rig a C 3-iC-LE'pLan - f o r m an6 b a s e d o n t n e ::HCA G Y O C ~ s e r i z s s e c ~ i o n r ; [ r e f e r e n c e 1 ) - he n i n g 'pi2.s a l s o t e s t e 2 ? r i t A l G - 2 clior?. s ~ l i t $ l a c s , d e f l e c t e c ? 6 0 0 , i n t L c c;;i:ter o f t .,e -rvfzg ar,S k a v i f l a F s r a n - t o w i c g s F a n r a t i c s o f O n 3 > G 0 5 , 0 . 7 , a n d 1,01 r e s p e c t i v e l y . 1 3 o r d e r t o E s t d a t a from w h i c h t o calculate t h e c k a r a c t e r i s - t i 3 s o f :';?_e f i a F p e d n i n g , t h e i n v e s t I g C t , i . o n o f r e f e r e n c e 1 as ext,?r-r?ed t o i n c i u d e t e s t s o f >';Le f o u r r e c t a n g u l a r - a i r f o i l s c f t h e 'j45AS.a 44ciOIi s e r i e s ( 4 4 O C X , 4412R. 4415R, a n d 4 4 1 8 3 ) r . i t 2 r Cu1i-ssaa b a 2 c h o r d , t r a l l i n g - e ? g e s p l i t f l s J s C e f i c c t a d 6 0 0 .
Tine n=;n.bers is t k c designation o f t h e t a y e r e d v i n g ( 3 - 1 0 - 1 8 ) r e f t r t o taper r a t i o , n s ~ c c t r a . t i o , ani! r o o t s e c t i o n F c r c e n t t h i c k n e s s , r e s ? e c t i v e l y , ' The c o r i s t r u c t i o n t i p s e c t i o n P'BS S ~ e r c e r i t t h i c k . Tne m i n g w t 3 s c o n s t r u c t e d u s i n g s t r a i g h t - l i n e c i e ; r , e n t s b e t w e e n c o r r e s y o n d i n g c o i n t s O E t k e r a o t (YACA L L L I ~ ~ R ) 2 , ~ s ti? (i!-A.cA 4 4 ~ ~ 2 ) s e c t i o n s , ar,d s o t h a t i n C r o n t e l e v a t i o n t h e u s - g e r e l e n s n t T a s a
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