<a href="https://en.wikipedia.org/wiki/2009_Norwegian_spiral_anomaly" rel="nofollow">https://en.wikipedia.org/wiki/2009_Norwegian_spiral_anomaly</a><p>links to <a href="https://www.csmonitor.com/World/Global-News/2009/1210/norway-spiral-a-rocket-scientist-explains-the-mystery" rel="nofollow">https://www.csmonitor.com/World/Global-News/2009/1210/norway...</a><p>> The spiral, he says, "comes when you have a motor firing off the axis of the vehicle at right angles to the line that connects to the center of mass" yielding a "pinwheel."