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Old 21st Apr 2017, 17:12
  #1054 (permalink)  
paco
 
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The temperature would be -66*, so if you set the Mach index arrow against that and look against 0.8 on the inner scale of the whizzie you should see 446 kts or so on the outer scale.

*33 x 2 = 66 -15 +15
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