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NACATN 2079 103AverageAverageEngine:etiequency Propeller: frequencyFundamental ––-–– –– 137 Fundamental —– — 85Second harmonic — — Second harmonic —--— 171Third harmonic —---—Over-all level.Nose+ o 0-. o_ o onLeftwingRightwingI.TailSound level in db referred to 0.0002 dyne/cm2(c) Three -bladedpropeller,configuration2B.Figure 27.-Continued...——-—.----.-v . . . . . . . . ——. ———. — .-L .... - ..
104 NACATN 2079AverageAverageEngine: frequency Propeller: frequencyFundamental––––– 132 Fundamental —-—-—110Second harmonic — — Second harmonic —--— 220Third harmonic — ---—330over-all level.LeftVJiIlgRightwingYv- Is-o ‘bwco 00l-l“o .Sound level in db referred to 0.0002 dyne/cm2(d) Four-bladedpropeller,configuration2F.Figure 27.-Continued..——.———- — - — ..— ——— .—— ——
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4 NACA TN 2079DESCRIIZIItONOF APPAR
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6 NACA TN 2079Propellers and Pr@el.
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NACA TN 2079 9oTo determine the air
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.NACA TN 2079 11was used to measure
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NACA TN 2079 13con~unction with exh
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16 NACA TN 2079configurations and a
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18 NACA TN 2079observed in the rech
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Page 55 and 56: . 54NACATN 207’940.1635.1420.1225
Page 57 and 58: ...56I?ACATN 2079/40.16-40,35.14 -3
Page 59 and 60: 58 NACATN 207940.16!035.143530.1230
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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..-— ..— — —
Page 89 and 90: ..88o0d+NACA TN 2079.o0*ml.o.0*IN8m
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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: 102NACATN 2079AverageAverageEngine:
Page 107 and 108: 106 NACA TN 2079.AverageAverageEngi
Page 109 and 110: 108 NACATN 2079.5 m.0---- .——
Page 111 and 112: 110 - NACATN 2079.!5CL),,./,“,. .
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Page 122: NACA TN 20791210=.,.,NACA-Langley -
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