The Aerodynamic Characteristics of Flaps
The Aerodynamic Characteristics of Flaps
The Aerodynamic Characteristics of Flaps
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TABLE<br />
2--continued<br />
Type <strong>of</strong><br />
Flap, etc<br />
Wing<br />
Section<br />
Flap<br />
Chord<br />
cfl/c 1 cf~/c<br />
Flap Angle<br />
/31,&<br />
deg<br />
Extended<br />
Chord<br />
c'/C<br />
A Cz<br />
(o~ =o%+10 deg)<br />
A=6<br />
A C~o<br />
(~ =So-t-6 deg)<br />
A=6<br />
z~] Cmr<br />
(c~=c%+10<br />
A=6<br />
deg)<br />
z~ CL max<br />
(eL=o.8<br />
C,~\<br />
A/•<br />
Cz, max,),<br />
A CL'<br />
(Measured)<br />
Z~ emir<br />
(Measured)<br />
A C z'<br />
(Estimated)<br />
A Cmr<br />
d C~<br />
(Measured)<br />
fl C,,',.<br />
Z] Cz'<br />
(Measured)<br />
Remarks<br />
Ref.<br />
Blackburn<br />
Split & Slotted<br />
N.A.C.A.<br />
0018<br />
R.A.E. High<br />
Speed t/c=<br />
0.5, 0.5<br />
0.5, 0.5<br />
0.5, 0.5<br />
0.5, 0.5<br />
25, 20<br />
30, 35<br />
35, 25<br />
35, 35<br />
1"105<br />
1-185<br />
1.156<br />
1-156<br />
2"07<br />
2.415<br />
2.31<br />
2.29<br />
0.104<br />
0.189<br />
0.193<br />
0.208<br />
--0.609<br />
--0.679<br />
--0.664<br />
0.660<br />
2.10<br />
2.17<br />
2.09<br />
2-08<br />
0.044<br />
0.045<br />
0.049<br />
0"660<br />
1 "79<br />
2"10<br />
1"94<br />
1"91<br />
0.440<br />
--0.522<br />
--0.429<br />
--0-432<br />
1.73<br />
1 "97<br />
1 "97<br />
1.90<br />
0"29<br />
0.28<br />
0"29<br />
0.29<br />
0.25<br />
0"25<br />
0"22<br />
0"23<br />
68<br />
68<br />
68<br />
68<br />
Blackburn Flap<br />
with Flap Leading<br />
Edge Slat<br />
B.A.0018/12<br />
Composite<br />
section<br />
0.5, slat<br />
chord<br />
=0.086c<br />
0-4, slat<br />
chord 0" 19~<br />
50<br />
40<br />
1-1335<br />
1-24<br />
2"28<br />
1.631<br />
0.143<br />
0.097<br />
0.780<br />
0.569<br />
1.93<br />
1.72<br />
1 "52<br />
1"17<br />
0.293<br />
--0.283<br />
1 '35<br />
1 "23<br />
0"34<br />
0"35<br />
0"19<br />
0-24<br />
A Cz' Estimated as for Single-slotted<br />
Flap <strong>of</strong> 0.57c chord at 50 deg<br />
fl C~' Estimated as for Single-slotted<br />
Flap <strong>of</strong> 0.5c chord at 40 deg<br />
69<br />
70<br />
Blackburn Flap<br />
with Inset Slot<br />
B.A.0018/12<br />
Composite<br />
section<br />
(t/c=O.18)<br />
Composite<br />
section<br />
(t/c=0'12)<br />
0.5, 2 inset<br />
slots<br />
0.4, 1 inset<br />
slot<br />
0.4, 1 inset<br />
slot<br />
50<br />
40<br />
40<br />
1.285<br />
1.09<br />
1"12<br />
2"33<br />
1 "60<br />
2.05<br />
0"117<br />
0.052<br />
0.048<br />
0.820<br />
0"467<br />
--0.602<br />
2.06<br />
1"55<br />
1 "60<br />
1 "63<br />
1.42<br />
1 "75<br />
0.360<br />
--0.351<br />
0.418<br />
1 "28<br />
1.19<br />
1 "20<br />
0"35<br />
0"29<br />
0"29<br />
0'22<br />
0"25<br />
0"24<br />
69<br />
7o<br />
70<br />
Blackburn Flap<br />
with Shroud<br />
Deflected<br />
Venetian<br />
Blind Flap<br />
B.A.0018/12<br />
N.A.C.A.<br />
23012<br />
0.5, Shroud<br />
deflected<br />
=0.08c<br />
0.4c Flap<br />
made up <strong>of</strong><br />
4 slats<br />
(Clark Y<br />
section)<br />
0.1c each<br />
Flap Angle<br />
=50<br />
Shroud<br />
Angle = 17<br />
/31=&=G /3°=30 l<br />
=/34=30<br />
/3°=60<br />
&<br />
=/34=40<br />
flo =60<br />
/3 =4o i<br />
/32 =60<br />
fla =50<br />
'~<br />
J<br />
/3~ =70 a<br />
1 "27<br />
1 "37<br />
1.37<br />
1.37<br />
2-26<br />
1 "26 s<br />
1-875<br />
1.925<br />
0.122<br />
0.021<br />
0.037<br />
0-133<br />
0.675<br />
0.61<br />
0.96<br />
0.96<br />
1 "78<br />
1 "46<br />
1"93<br />
2"11<br />
i<br />
I<br />
0.043 M<br />
--0.060<br />
--0.060<br />
1 "62<br />
0"72<br />
1'16<br />
1 '20<br />
0.299<br />
--=.0.222<br />
--0.329<br />
--0.327<br />
1.63<br />
1 "42<br />
0"96<br />
1.13<br />
1"13<br />
0"30<br />
0"48<br />
0"51<br />
0"50<br />
0"18<br />
0"31<br />
0"28<br />
0"27<br />
A CL' Estimated as for Double-slotted<br />
<strong>Flaps</strong><br />
A C~' Estimated for Plain Front Flap<br />
and Rear Slotted Flap<br />
d CL' Estimated for Single-slotted Flap<br />
at 30 deg<br />
fl CL' Estimated for Single-slotted Flap<br />
at 60 deg<br />
fl C~' Estimated for Sing!e-slotted Flap<br />
at 60 deg<br />
69<br />
77<br />
77<br />
77<br />
32
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