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Re: Flash boom thump?
I have had the honor to be present (very close, as in right next to the gun) during the live firing of a Rev War 4-pounder. The sound of the ball leaving the barrel and travelling downrange was akin to the doppler effect sound of a jet just before you hear the exhaust note as it passes you. The sounds used in Gettysburg during the preliminary cannonade to Pickett's Charge, especially the one that fires just as the camera is panning past, were remarkably similar.
I have had the honor to be present (very close, as in right next to the gun) during the live firing of a Rev War 4-pounder. The sound of the ball leaving the barrel and travelling downrange was akin to the doppler effect sound of a jet just before you hear the exhaust note as it passes you. The sounds used in Gettysburg during the preliminary cannonade to Pickett's Charge, especially the one that fires just as the camera is panning past, were remarkably similar.
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