NASA NACA-RM-L7D11-1947 Wind-tunnel investigation of bomb-bay configurations intended to minimize the tumbling of light-weight bombs《旨在使轻质炸弹的歪斜最小化的炸弹湾结构的风洞研究》.pdf

1、RESEARCH MEMORANDUM - R,ichard E. Kuhn and Edward C. Polhamus L t Langley Memorial Aerormautical Laboratory Langley Field, Va. 3 NATIONAL 4 FOR ADVISORY COMMITTEE AERONAUTICS Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. I. . Provided by IHSNot f

2、or ResaleNo reproduction or networking permitted without license from IHS-,-,-The present investfgaticm coniated of a photographic study of the trajectories described by emall model bombs as they were released from a simulated bomb bay in a fuaelage modeL. The tests were con- ducted at two tmel apee

3、da and the effects of various deflectors, sep the- directIan and nature of the air flow within .the bombba is-.depicted as well as the bonib trajectorfes. The xqmbole .an reco- weye of the fhctuaticms of the static pressure at th points in the bmb bay (fig. 2) and %he results are preeeted in bBle I.

4、 .The Vnstallation. of cells in .the bamb bay (cdigktion coneiderably reduced the amputude of these f luctuatiom, especwly in the rear of the bonib by. ,. * Dm; measurements were also =de on some of the configurations and the drag Coefficients are presented in hble I. These drag coefficients Provide

5、d by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-are baaed 011 the wlw area of n.65 Square feet; the drag coefficient of the model with the bomb bay closod ie 0 .O35 tho drag coefficient .i of the wing alone ie 0.028 Attachfng deflectors. ahead of the bab ba

6、y materially increwed the drag. However, a wedgo-ahaped deflector gave the malleet increase in drag. t coNcLusIom- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-scrmbbas (fie. 3) A A A A A A A A A A A A A A A A A A A A A A A A F 10 -foot tunnel. r

7、I I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NACA RM No. L7DlI Fig. 2 I I NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS I I I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Fig. 3 NACA RM No. L7

8、Dll Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NACA RM No. L7Dll Fig. 4 I I fll “i 4.84 NATIONAL ADVlSORY COUMITTEE FOR AERONAUTICS Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Fig. 5 NACA RM

9、No. L7Dl1 NATIONAL ADVISORY COMHITTEE FOR AERONAUTICS . Y Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MACA RM No. L7Dl1 Fig. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot fo

10、r ResaleNo reproduction or networking permitted without license from IHS-,-,-I Figure 8.- View of interior of bomb bay showing magnetic bomb shackles and pressure orifices. I I . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NACA R.M No. L7Dll Conf

11、iguration 1 Bomb Bay A Doors A I Figure 9.- Representative pictures of drops. r I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NACA RM No. L7Dll Fig. 9 cont. Configuration I Bomb Bay A Doors A Tunnel speed reduced to slmulate a bombing speed of 15

12、0 mph. Figure 9.- Continued. I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NACA RM No. L7Dll Fig. 9 cont. Configuration 3. Bomb Bay A Doors D Figure 9.- Continued. I . Provided by IHSNot for ResaleNo reproduction or networking permitted without l

13、icense from IHS-,-,-NACA RM No. L7D11 . Fig. 9 COT& t Configuration 5 Figure Bomb Bay A Deflector C-0 Separator A Doors A 9.- Continued. . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NACA RM No. L7Dll Fig. -9 cont. &“ “. -“ . . . “. “ “ . - 4 Con

14、figuration 11 Bomb Bay A Deflector Be Separators C Doors Off Figure 9.- Continued. I ! Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NACA RM No. L7Dll Fig. 9 cont. Configuration 20 Bomb Bay A Deflector B-3 Doors A Spherical bombs Wind off Figure 9.

15、- Continued. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-r NACA RM No. L7Dll Fig. 9 con- Configuration 24 Bomb Bay A Deflector C -0 Doors A Figure 9.- .Continued. I I I I Provided by IHSNot for ResaleNo reproduction or networking permitted withou

16、t license from IHS-,-,-NACA RM No. L7Dll Fig. 9 cone. Configuration 35 Bomb Bay C Deflector B-6 ,Doors Figure 9.- Concluded. C ! I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NACA RM No. L7Dll Fig. 10 F “ ! I I figure f0 _- Results of bomb drops

17、and tuft sfdres Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Fig. 10 cont. NACA RM No. L7Dll “_+“_ I I “t “ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NACA RM No. L7Dll Fig. 10 conk . c _“ “_

18、omK5 A corrfgumtm /8 Bomb bay R DeP1ecior A+2 Doors A Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Fig. 10 cont. NACA RM No,. L7D11 -.- -#C-+k“ -=-+ “_ COWTTEE mu AERONAUTICS NATIONAL ADVISORY . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MACA RM No. L7D11 Fig. 10 cont. “ ? I k“ I ! I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-