Experiments in External Noise Reduction of ... - CAFE Foundation

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NACATN 207’95740.164035.143530.12 “3025.1025.06.-“Ial15.061510.0410.5.025000 .2 .4 .6 .8 1.0 1r/R,0”Figure 13. - Blade-form curves for.solid-bladedpropeller(seetableI).h, maximum thicknessof element;b, width‘(chord)of element;r, radiusof element;R, tipradius;b, diameter ofpropeller;P’,pitchangleof.element; BT‘,pitchangleof tipelement: ‘-----.——-. ——___ .-... — . .—
58 NACATN 207940.16!035.143530.123025.1035gv&a)Q4~20:.02=-l-E‘ḍ~o -a&1m.15.06151050.04\13T’.02\0 0v.4 .6 .8 1.r/RZj7) 11050- l?igurel4.- Blade-form curves for conventionaltwo-bladedwooden propeller- (seetableI). h, maximum thicknessof element;b,width (chord)ofelement;r, radiusof element;R, tipradius;D, diameter ofpropeller;B‘,pitch=gle Of element; f@’,pitchangleOftipelement..
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4 NACA TN 2079DESCRIIZIItONOF APPAR
Page 7: 6 NACA TN 2079Propellers and Pr@el.
Page 10 and 11: NACA TN 2079 9oTo determine the air
Page 12 and 13: .NACA TN 2079 11was used to measure
Page 14 and 15: NACA TN 2079 13con~unction with exh
Page 17 and 18: 16 NACA TN 2079configurations and a
Page 19 and 20: 18 NACA TN 2079observed in the rech
Page 21 and 22: 20NACA TN 2079however, the differen
Page 23 and 24: 22NACA TN 2079a direct-drive airpla
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Page 27 and 28: .26rNACA TN 2079 “APPENDlxGROUND
Page 29 and 30: .. .. _ .28 NACA TN 2079Dur@ thiS t
Page 31 and 32: .- —.-_ ._ . . .. . .. .. .30 NAC
Page 33 and 34: .=___. . . _.NACA TN 2079“v.—
Page 35 and 36: 3k ‘NACA TN 207’9TABLE v. - SOU
Page 37 and 38: 36 NACA TN -207’9. —.cclm mu mm
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Page 55 and 56: . 54NACATN 207’940.1635.1420.1225
Page 57: ...56I?ACATN 2079/40.16-40,35.14 -3
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Page 71 and 72: .70 ‘\I .zw(
Page 73 and 74: 72 NACA TN 20794ml..—.— -.
Page 75 and 76: . ... .74 NACATN 2079-1-$wii(xl..
Page 77 and 78: 76 NACATN 207’$)..nml.1b-._ .—
Page 79 and 80: 78 NACA TN 20’79..—.— — —
Page 81 and 82: .80 IVACATN 207’9—..—— -.--
Page 83 and 84: 82 NACATN 207’9——— —--—
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Page 87 and 88: 86 NACATN 2079..-— ..— — —
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Page 91 and 92: 90 NACATN 2079.,..—— — - —
Page 93 and 94: $)2 NACATN 2079Im“Na)zis,.——
Page 95 and 96: 94 NACA TN 2079.(1.Im“ml..u“b..
Page 97 and 98: 96 NACATN 2079CD-d+o ‘+1..,,—
Page 99 and 100: . .98 NACATN 2079../0alCnIm“mlalE
Page 101 and 102: 100 I?ACATN 2079(5ml.r!-—. ——
Page 103 and 104: 102NACATN 2079AverageAverageEngine:
Page 105 and 106: 104 NACATN 2079AverageAverageEngine
Page 107 and 108: 106 NACA TN 2079.AverageAverageEngi
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108 NACATN 2079.5 m.0---- .——
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NACA TN 20791210=.,.,NACA-Langley -
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