RayProudfoot Posted July 22, 2018 Share Posted July 22, 2018 For those of you flying Concorde you will know it’s essential to be subsonic around 65nm before landfall. This is because the sonic boom spreads outwards and forwards for a considerable distance. Locate the point on EFB’s map where your flight path crosses the coastline. Right-click and choose the option to create a range circle. Change the distance to 65. You still need to calculate the deceleration point to ensure you are subsonic 65nm from the coastline but now have a visible indication of that point. Where a subsonic leg is required aim for FL410, Mach 0.95 for optimum fuel burn until further descent is required. Quote Link to comment Share on other sites More sharing options...
rcutanda Posted August 5, 2018 Share Posted August 5, 2018 Thanks for the tip Quote Link to comment Share on other sites More sharing options...
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