NASA NACA-RM-A7H29-1948 High-speed aerodynamic characteristics of horn and overhang balances on a full-scale elevator《全比例电梯喇叭和突出部分平衡的高速空气动力特性》.pdf

1、RM NO. A7HZ9 - RESEARCH MEMORANDUM HIGH-SPEED AERODYNAMIC CHARACTERLSTICS OF HORB AND OVEREANG BALANCES ON A FULL-SCALE ELEVATOR BY Joseph W. Cleary and Walter J. Rrumm Ames Aeromuticrl Laboratory Moffett Field, Calif. 0 TECHNICAL EDITING WAIVED NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS WASHINGTON

2、 N A C A LIBRARY Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3 1176 01360 5267 “- .- * By Joseph W. Cleary and Walter J. Biwnm SUMMARY High-speed wind-tmnel tests have been conducted of horn- and overhang-kahme elemtors on a full-scale, semispan,

3、 horizontal tail. The effects of unshielding the horn and of unsealing the - L tc werhang were investigated. *K. t-7 .- . . A?-!? . i Analysis of the data shows that shielded-born bdances can be/. .*y- “. used advantageously to give 8 positive rate of change of hinge- mcment coefficient with angle o

4、f attack, or when used in conjufction with an mer- balaace to limit this quantity to a small value. Although mahielding the horn caused considerable overlalancing and a relatively large positive rate of change of hiwcmnt coeffi- cient with angle of attack, these quantities can be regulated by approp

5、riately chooslng the horn area and. chord, Cowre- cawed slight merb b-es with shielded and unshielded tip. Parameters Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-6 EAGA RM No. Am expressing the variation of the lift-curve slope C parmters produce

6、d a - u T,Y- rruarerical decrein me fkcm -0.50 to -0.283” the same FB shown in figure 35 for 0 -e of attack and several elevatm asgles. Since the critical ro I 1.490 I 1.696 2.850 b690 1.424 1.636 1.184 1.712 1.083 1.443 + 1.815 8.05 I 1.815 8.420 1.748 9.669 1.630 o Stmight lines from station 4.532

7、 inelids to trolllng edge mdius. 6 Stralght lines from statlm 3662 inclHs to troilfng edge radius. .( . . Z ? Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. . . . . . . . - - rr . # k TABLE llIrSUMMARY OF THE ELEKAm CHLIRACERISTICS L 4 Noie - Valu

8、es of parameters are for tmd 6, of O? Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Fig. 1 NACA RM No. A7HZ9 . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NACA RM No. A7H29 (a) Front view. . . #

9、 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NACA RM No. A7H29 Fig. 3 Shielded normol-nose horn balance Unshieldad normal-nose horn balance NATlOflAL ADVISORY COWLUTTLL FOR AERONAUTICS Unshielded eilitical-nose horn balance -/oas “-4 -crL Overhan

10、g balance with reduced semispan AK Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. NACA RM No. A7H29 Fig. 4 a, b (a) Unshielded elliptioal-nose horn. (b) Overhang with unshielded tip. Bigure 4.- The horizontal tail with two unT-;hielded-balance ele

11、vators. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. . . . . r a , . . . . L “ -e- E 3 E Q m 3 v, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Fig. 6 NACA RM No. A7H29 . U O 3 I I I I I I I I

12、I I .3 .I -5 M .6 .? *8 .9 fibure 6.- &Yf, drog, ond pitching-momenf coefficients hr the semlspun horizonfal toil wl#h the overhang-bolome elevator. 6, Oo Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MACA RM No. A7H29 Fig. 7 c . figure X - Lift, d

13、rag, and pitching-moment coefficients far #he . semispon hodzonfd foil wifh the overhang-balance ekvafw. a, Oo Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Fig. 8 NACA RM No. A7H29 .4 CL rf 0 -it2 0 Gm -. 04 . Ok Go 0 Ffgure 8. - Lift, drag, and p

14、ifehing-moment cosfficienk for fhe semispan horizonfa/ tai/ with the overhang-bolanos elevator having on uns/rie/ded t/p. &, Oo Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NACA RM No. A7H29 c 0 0 -. oa 0 Fig. 9 figure 9. - LifG dmg, und pifching-

15、momenf coefficients for the semispan horkontd fail wifb fhe overhung-ba/unce elemtor hmng on unshielded tip- a, Oo Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Fig. 10 NACA Rh4 No. A7H29 0 7004 c* 6, 7008 T O/P .04 c 0 08 c4r .04 0 -. 2 cr 6e 74 .

16、P .3 .I .8 M .6 .7 .U .9 Figure IO. - Variation of pitching moment, lift, and elevatw-effectiveness parametem with Mach numhr for the overhag-bufonce elevofor with ond without 0 shidbd tip. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MACA RM No.

17、A7H29 . c Fig. 11 a Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Fig. 11 b NACA RM No. A7H29 “ “ (6) Mach numbet, 0.5 F&we I/. - Continued. . “ .c r Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-

18、NACA RM No. A7H29 Fig. 11 c . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Fig. 11 d NACA RM No. A7H29 “- / 0 / P “_ “_ - I -4 I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NACA. RM No. A7H29 Fig. 11 e - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Fsg. 11 f NACA RM No. A7H29 “ . . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-