1、REPORT No. 715LATERAL CONTROL REQUIRED FOR SATISFACTORY FLYING QUALITIES BASED ONFLIGHT TESTS OF NUMEROUS AIRPLANESBy R. R. GILRUTHand W. N. TURNIIRSUMMARYAn anals has been made of the aileron control char-acteristics of numerous airplanes tested in jlighi by theNatwnal Advisory Committee for Aerona
2、utics. In thecorrelation of satisfactory and unsaiisfadory characteris-tics with measured values, it was found that the helix anglepb/l?V, which expre8ses the lateral displacement of the wingtip in a gisen forward travel of the airplane, was the meas-ure of the aileron eecthenew appreciated by the p
3、ilots.It wus also found that regardless of sise or category of theairplanes tested, which included pursuit, transport, train-ing, and bomber types, a value of pbiW oj 0.07 represimteda criterion of minimum sattijactoy aileron e$e / #4:1,ti, The valuesfigure e DitXer- T “ -“ D;ffer-ihinuirfoi!s ,-” C
4、. e- uf * e“c.6: aileron A6e=30”.“ oileran Ah =30,0 Mod. Frise 0.20 /6-/4/.i Plainunsealed il.Oti18-9”,/6 Sfofted .30 270 . . .00 /7-9”v Plainunseoled .00 1?-!3 ; “ seoled 00 17-9”,.,. _ v “ aeofed 00 173 A = unsealed .00 17-8”-r.? 4 a71 sealed .00 20-/0 -;A Frise 2? ?7-1.3k .4!-_ ,. Q -O Frise/, (I
5、Mod. Fr;s./ Cbb 0“”, Y Frise/- Plo;nsea!.2 ;: A Frisea75 *I b., -+ “”- -.49 /a=i2 v Mod.Frise.48 lti:14.20 17-3. .52 15/5led .00 23:7 Ploinsealed “.00 22-8 H.25 11.07 15-i5.15 15-/5-to- Slot fedQ-Fri.sew Slotted.54 t6-14.20 f5-Is.30 /9-9” 1- -i Plainunsealed ,00-l?-ga Q Mod.Frise .7 15-J51Mox)mumdef
6、lecfiano .! .2 .3 .3=p%?IGUBE9.-Mkron MTectkonces factor k, as measured in Sfght fOI various wirwaikron arrnngemons (M.-W”).of k determined in flight are considerably lower thanthose predicted by theory and, in most cases, they arelower than values obtained for comparable aerody-namic arrangements i
7、n the wind tunnel At least partof this eflect may be accounted for on the bask of thedeflection of the wing in torsion and the deflection of theaileron control system. For timple, 1 of wing twistvarying uniformly from the wing tip would reduce theapparent aileron tiectiveness by about 20 percent:The
8、 wing deflections experienced by the various air-planes, however, are unknown. The deflections that.occurred between the ailerons pnd the cockpit controlare Iikewise unknown. Inasniuch as aileron deflectionswere determined on the basis of the position of the cock-pit control, this fact would further
9、 tend to reduce theapparent aileron tiectiveness. For these reasons, itwould seem unwise tQdraw any il.nalconclusions r roll against theailerons usually occurred as a result of the adverse yawdeveloped.LANGLEY hlEMORIAL AERONAUTIC LABORATORY,NATIONAL ADVISORY COWEE FOR AERONAUTICS,LANGLEY l?CELD, VA
10、., Aw”l 18, 191.REFERENCES1. Weick, Fred E., and Wenzinger, Carl J.: Wind-TunneResearch Comparing Lateral Control Devices, Particu-larly at High Angles of Attack. IOrdinary Ailerons onRectangular Wings. Rep. No. 419, NACA, 1932.2. Weick, Fred E., and Jones, Robert .T.: R&um6 and Analysisof N. A. C.
11、A. Lateral Control Research. Rep. No. 605, “NACA,1937.8. pearson, Henry A., and Jones, Robert T.: TheoreticalStability and Control Characteristics of Wings withVarious Amounts of Taper and Twist. Rep. No. t3M,NACA, 1938.Provided by IHSNot for ResaleNo reproduction or networking permitted without lic
12、ense from IHS-,-,-TABLE 1.-CHAIL4CTEIHSTICS OF AIRPLANES TESTEDwing.7hmysg.pilotsIpinfon?Ye9Pype of control.-(% /%4L8Afr-plane Wing_4ngnt8r- Air-plmleN0Wlngngroontac- rype 01control27.2 0.105 29.0 ($?pm.)28.9 .100 27.0 .Cl19.3 .075 19.8 .088 19.7 .0a9!M8 .022m.o .r2fl224 .lmlIID ModifiedR&d 4nr&
13、i-nla.m FrisebalanoedA Pncsuit 85.0 YwYeaYea8-pMeOonlmerolds-placeCOmmecdalt= M&l&dMBncedB slotted 86.087.884.2 9.49.7Ye9Pnr6nitb=1:lb FrisOb81uJlced 34.086.026.085.2.089 Ye9c1DE-1E-2Pnr9nit slotted 1?!.1=1,lp-yFrimbdmwd 6.86.1.147.1011.OQ!YeaPnrsult Slott%d 87.8 Y(IIYeaQIib IibPlainnnbalamedrmaealt
14、iFliaebalancedFdaebalancedPlublunbekmoedIt YeeYesYEaYeaYesYES80.0PmnnlxdamedSQslad 80,0Ye3YeaY6a6.5!IF Friwbfdanmd 42042.070.532882888.810.1 .(m.C&.077.ca!lb PlablnnbcdancedunsealedMod4dedi!%adG SmutbomberT-2 8.81= P18fnUnlBlfmcedtmseakdMcdlEedbalanmd 1o.1HIYea T-8T-4IP P?&dUledbland Yeam 180.61. ,1
15、 II,.I1,I , i:Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-P “IMndifiad I J Romber101,0 27.1 .016 N()IIT-3?PlainI balanctulErpertmental , unbfdanrad I39”8 10.1 .0!9 NoI unsmlod . .K Bomber IiP Frl.?a ,f139149.0?Plainbalanced 17.6 (aver- No 1 T-6 E
16、xporlmental , rmbalanwd*) 328 10.1Sc31ul .071 Km. LID=PlainTransport unbalanwd 40,n 34.i .071 Yes T-7 J3rlmentalD=171catingsealed W7ngtipf86.8 &6 .055 No M “,PPlainlhnsport nnbdmmedOh6 n. 6 .Oefj YrLs I? Exporbnanta,lb.047tied Ratraotable 34,0 M. I (low Nose).1“i : . iProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
