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AIR DOCUMENTS DIVISION

N >

"l;|li|; mam • i-Vl.illill illll

HEADQUARTERS A« MATER.EL COMMAND

WRK3HT HELD. DAYTON, OHO

* %

ITs GOVERNMENT IS ABSOLVED

FROM ANY LITIGATION WHICH MAY

ENSUE FROM THE CONTRACTORS IN-

FRINGING ON THE FOREIGN PATENT V

* •*••

WGHTS WHICH MAY BE INVOLVED.

JSS^rJOJ-j

ABB June

NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS

ATTNöMSP WARTIME REPORT

ORIGINALLY ISSUED June I9hi as

Advance Beatrlcted Foport

«TND-TUWffiL INVESTIGATION OF A PLAIN AND A SLOT-rLIP

AILBBON ON A WIMG WITH A POLL-SPAN FLAP CONSISTING

OF AN IHBOAKD FOWLBB AND AN OUTBOABD SLOTTED FLAP

By F. H. Bogallo and Marvin Schuldenfrei

Langley Manorial Aeronautical LaborateflrnrprrTnentS DiviPtTO. T

-1

a tfr* J«. f> *"> "V^angley Field, Va. I E» fit 1 -'' I &v« MÜ,

1

RETURN Sperial DOOMKII 5 Branch - ISKnr-6 Wriihl Held • u.e,...« bbu» action

A« Documents Diw;iu;i-Intelligence (.--2) Wi«ht Field, Dayton, ühio.

AMC, Wright FfcW > Kicroji rt. to.

ÜJLU1947I*

NACA WASHINGTON

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 are now unclassified. Some of these reports were not tech- nically edited. All have been reproduced without change In order to expedite general distribution.

L - U21

]

3

fira-TOTSlIi I1I7SSTIGAI10-J OF A PLAIll AIT35 A SLOT-LIP

AILSHOL" OIT A TTI1TG SITE A FÜLL-SPAH FLAP C0ITSISTI1TG

0? Ali I1T30ARD FCflLSR AÜH All OUTBOARD SLOTTED FLAP

3-" P. I.'. Sotallo and liarvin Schuldenfrei

SUUUAET

\

An investigation nas made in the 1IA0A 7- "by 10-foot tuir.e 1 of a slot-lip aileron and.a plain aileron, sir-iji;' and in combination, on an 1TACA 23012 -.»ir.t; vrith a full-span flap. The flapconsisted of a 0. 3LoFo~ler flap over the i:iboard 6.7 percent of tbf -Tint; 3pan and a modified clotted flap over th« rer.-iir.der of tap dag. Tho static rolling, raving, ar.d hir-^e nome-ts wore clotrmined and prcscr.tod for BOT irnl angles r.f attack and for various combinations of defIcetionr. of the Inboard and outboard flaps.

Tho characteristics of those lrtcral-nontrnl devlcos tore essor.tiall," tho sane aa thoao of ainilar devicee on the ring with full-rpan ITACA slotted flapa as tooted in a previous investigation. With the nr.no noflificationa as.. roconr.ondoi? in tho previous investigation, there devices should provide acceptable lateral-control characteristics throughout tho uaeful flight ranee.

The Fouler and codified r.lottod-flap combination £avo aa ostlr.atod 14-porcnnt increase la, r.axiuun lift coeffi- cient over that ojf the full-apan :*ACA slotted flap of tho Investigation provioiraly ner.tionod.

i::iacDi;0Tio;T

Thin report continues the ir.venti^r.tion of clot-lip and plain -Heron characteristics v:ith full-apan flr.pr no reported Is ref ••rrnco 1. F'.r the present investigation, . the full-spas nlotted flap was replaced T>j» a Fovler flap ir.board of tho .aileron ar'ator. and a r.odificd slotted flap over the outboard portion »f the wine. The section aero- c".:'r.anie characteristics of both of these flapa are üiven in rofcror.ee 2; the nodlfled slotted flap, having the slot lip located at 0.90c, vai selected for use rith the slot- li-o aad plala ailv-ror.a bce'auao it ahnred a hieher CT

than tho slotted flaT of roferancc 1.

J

I

1

2 •

AP3ABAW8 ARS LISTHOSS

The testa rerc r.nde ir. the SAÖA 7- V 10-foot wind tTir.rc 1 at r.hout 40 nilos per hoxir vrith tin 4- "b;r 8-foot srnir>p."n nodcl investigated ir. roforonco 1. The no del TMS ir.odl.icd for ••?. c.&nhir.ntlon of TTovrlor and slotted,full- r.p.in flaps, sections of \?hieh are shorn ir. figure 1. Or- dinatos for thonc flaps aro.given in roforencc 2. Calcu- lations of the roiling, .raring, and hir.go r.:oror.te --ere sinilar to there of reference 1. The vilr.ee of tunnel lift coefficient for the plain rir-t; vrore computed fron the outooard verticil reaction r.canurcd ir. t"ic tunnel , assur.- ir.^ a lateral coatcr of prcraurc of 0.45 senlopan. Refer- ence a H and 3 r^rc u-.cä. to cntir.f.te the eorretipor.dir.jj rln^ lift coefficient« rith flaps deflected.

The optir.ur. deflection for mxirvun lift of the Toiler flap V.-CE selected as 40° (reference 2) . The outooard r.od- ified' slotted flap ran tented at deflections of 15°, 35°, and 35° in cor.oir.atior. rith ths Fowler.flap. It ras tho-^ht . that the plain aileron alone r.i^ht furnir-h adequate .-.oc- troi for lor outooard flap deflections. Consequently, the 15 and the 25° outooard flap deflections -..-ere tested rith the slot-lip aileron locked in the neutral position.

BXSULSfl ABI DI8OTS8I0H

The following synods aro used in tho presentation of result•:

Or lift coefficient (--}

C, ' rollin^-r.onont coefficient ! -~4, * \ q aS/1

Cn' yarinc--.oront coefficient [—SB ) *

Cjj plain aileron hlngo-nonont coefficients

(Hp/qh^Cp8)

C. slot-lip aileron hingo-rionent coefficient •"si

V

alOE flee and prop •.-hen tioa bv.t ailo tho floe

"he ac o In eo tod 15 5. The o rt J onr.

ho OU docre

ncarcci run -5.01* r.lope o ior.a n

dyn unc rd in

i;r

oar t

cha cti the n t

ic character! or- rith the o1

°, respective slight ir.crc

rgor increase flap in deflo rolling r.or.o

cs the advert ilro rit,r.i

ollir-^-r.orcr.t out'board fla

ntica of tho r>l* in all proa 'it board olott cd flapi de- 1?-, are &ivcr in fi i,uro5 4 ",sc la rollir £ " one r.t but a in adverse • awi ft £• no:-. or.t

cted IP0. A 2S° fl m deflec nt relative t n t aat r.t 15" o I'.iwinc nan« S.t nt P. ta lvoit fioa.it is the do ore aso ir.

rarTO at sr." 11 -.il cro B do- p is deflect.- d.

Calculations eher es eotinated increase ir..r.r.jcir-.ur. lift coefficient of 11, 14, !>r.,'. 17 j>»rcsr.t for 1?°, 55°, p.r.d 35° outboard flap deflections., ror,;"ectivel"_.

It in further entir.-tod fror rc'cf-ae 2 thn.t the com- bination of <iO° Fowler an.'. r"5° nodified nlotte d flap T70uld have approxlnttelj' 14 perooat creator r-axlnm lift coeffi- cient than the slotted fla-> of reference 1<

The .••.erod1

leror. ir. eonju olottod fl-.-j d

nan cti

eflo urea a r.r S 7. ther B ros uitn an 4

tior. (ref evonoo 1) hie -ith •£ho nlo A

the ~>lr,i~ all« PO c arc s-.all Oli tho sane directi o:: outboard flap at 2 BO"C r.t but incro as t'jest o •". i r. ref, •ro EC ->lai r. ail eros. IE t jace at nl ot-lip a« raw* n0 ef foet .. hi or.1," •Uf htlj-,

ic rharact on -rith t'.i cted 2S° an ro ir. no c the result

The r.ax lip p.llere alone, and oral, dcfl

6° 0* 38°, es t'~c adv e 1, it r.a he o^ponit leror. in o ic deereng

riet Pie a5c

no r.t of Ur: arf>

th ctio aeon ad do rse

eo dir

dor --b »

IC! ir. » la: th. roJ

Vi

ad'

.C<

to

of the B ai icror., re preroa

.".ifferor jroviou3

li"C r.or.o r;- large arse ?rav:i f tho pi lot-lip ttlc to t ir.£ Donoa irablo to ion to th reduce th available

lot-lip -i- aad with the tod in fle- et botvreon inveatica-

nta obtain.a- cor.parod '.-ith n»i nonontß ia. ai leror. la il.-rcn, with ho rolling

An nut;- defloct the

at of the ad- e adverno rollir,^ v.or.onl

.V-.riour liokn£0 B^eteao aro f.lteueeed in reference 1 for eporatlas the tv.-o alloroae »eporatoiw and in oor.bina- tio: A3 in roferense 1, it !•; rooortrtoadod that .'ithcr tho np.ar. or chord of the plain alleren be increased by about 50 pereeat to obtain «.roator effectivenens. This incroane shoul.' be takes into acceur.t ir. r-akir.j; ntick- feroe an*, linkage oaleulatlone.

GOIICLTIDirG BXXA&X9

\

Tho characteristics of the plain nad alot-lip r.iler- ,-. one or. tho -.ring vrith full-span Fo»lor aa.i r.odificd slotted ä flaps, f>.a tested ia the proecat investigation, v,cro canca- Ji tiall;' the »ano r\8 the charactoristie? of nir.ilr.r devices

or. the wing with full-apati 1IACA slotted flap^i .".a t anted ir. a provinviB investigation. Ar. lr-creaso ir. nnxleua lift coofficioat of approximately 14 percent was indicated *oy nee of the flrtpa of the present roport over the rlottod flaps of the previous investigation.

The p.10c "o- 0 .:^7 l^?J plain aileron toatoa wan lonsid- orsd too 3m~.ll; -a increase of r.Tjout .50 percent in. its .-re", is rcconraer.dcd. With this modification, a conjian- tion ef plain, and alot-lip ^-Herons should provide accept- able lateral-control oharaeteriatloa throughout the uae- ful flight raa,jc.

Langlcj' Ucnorir.l Aeronautical Laboratory, Rational Advisor" Oonr.itteo for Aeronautics,

Langlc» Field, Ya.

SEPsrj:"OES

1. Rc^allo, Francis U, ".ad Spar.o , Bartholomew R.I "ir.i- Tuaael Investigation of a flats ".ad a Slot-Lip Aileron on n Ulr.£ with a Full-Spaa Slotted flap. VACA A03, April 1941.

". Lowrv, Johr. G. : Hiaf.-2ur.ncl Investigation of ".a VAOA E^12 Airfoil with Several Arrar.0;ncata of Slotted Flap« with Zstendod Lips. KACA TK Ir,. 808, 1941.

3, House, 3-u.fu.s O.i The Effects of Partial-Spar. Slotted Flaps or. the Acrod"'5.3ni c Characteristics of e Rec- tangular and • Tanarrc". 31.A.C.A. 2"01£ 7ia£. HAT*. IM Ho, 719, "l3?9.

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P

r ATI- 6380 1

Full-Span Flap Consisting ol an Inboard Fowler and an Outboard Slotted Flap REVISION

(None) AUTHOR(S): Rogallo, F. M.; Schuldenfrei, M. ORIGINATING AGENCY: National Advisory Committee lor Aeronautics, Washington, D. C.

OttO AOMCY NO. fMRL-421

PUBLISHED BY: (Same) -^«P"* DAT!

June'41 DOC. CUM Unclass.

COUKTUr

U.S. LANOUA6* Eng.

r*GM

18 ILUMTtATION) B^_J 1

diagrs, graphs ABSTRACT:

Slot-Up and plain aileron are used singly and in combination on wing with Fowler flap over the Inboard 63% of span and modified slotted flap over remainder of the wing. Static rolling, yawing, and hinge moments are presented for several angles of attack and various combinations of deflections of inboard and outboard flaps. Devices should provide acceptable lateral control characteristics throughout useful flight range. Sys-

Q II 1 tern described gave estimated 14% Increase In maximum lift coefficient over full- V W ( span NACA slotted flap.

DISTRIBUTION: Request copies of this report only from Originating Agency DIVISION: Aerodynamics (2) SECTION: wings and Airfoils^* /Li

ATI SHEET NO.: R-2-6-66

SUBJECT HEADINGS: Ailerons - Aerodynamics (03201); Controls, Lateral - Aerodynamics (26500); Ailerons, Slot-lip - Control characteristics (03240)

Air Documonit Divl.lon, intollioonr.« Department AIR TECHNICAL INDEX Wright-fattorton Air Fort« BOM Air Mai.ri.l Command Dayton, Ohio

i- I

r TITLE: Wind-Tunnel Investigation of a Plain and a Slot-Lip Aileron on a Wing with a

Full-Span Flap Consisting of an Inboard Fowler and an Outboard Slotted Flap AUTHORS): Rogallo, F. M.; Schuldenfrei, M. ORIGINATING AGENCY: National Advisory Committee for Aeronautics, Washington, D. C PUBLISHED BY: (Same)

ATT0- 8380

(None) OUO. AOIMCV NO.

ARR-L-421 PUDUSHMO AOENCY NO.

BAR DOC OAO. June'41 Unclass. I U.S Eng.

PAOfS BUSIAHOB 18 I diagrs, graphs

A8STRACT:

Slot-lip and plain aileron are used singly and in combination on wing with Fowler flap over the inboard 63% of span and modified slotted flap over remainder of the wing. Static rolling, yawing, and hinge moments are presented for several angles of attack and various combinations of deflections of inboard and outboard flaps. Devices should provide acceptable lateral control characteristics throughout useful flight range. Sjs-

,tem described gave estimated 14% increase In maximum lift coefficient over full- span NACA slotted flap.

DISTRIBUTION-. Request copies of this report onl. from Originating Agency DIVISION: Aerodynamics (2) SECTION: Wings and Airfoils (8)

ATI SHEET NO.: R-2-6-

SUBJECT HEADINGS: Ailerons - Aerodynamics (03201); Controls, Lateral - Aerodynamics (26500); Ailerons, Slot-lip - Control characteristics (03240)

I- Air Documontt Division, Intelligonco Dopartmont

Air Matorloi C AID TECHNICAL INDEX Wright-Pottorson Air Forco Bate

Dayton, Ohio