by LDB » Fri Aug 09, 2019 1:11 am
"The mixture movement and flame front propagation shown in the video are completely different from any sidevalve engine built in the last 100 years. Nothing shown occurs in any H-D flathead engine and especially a K, which is one of the most highly developed flathead engines of all time."
What exactly do you mean? The flame starts at the point of ignition, i.e., the spark plug, and burns outward in a 360 degree direction from that point on any head old or new. Of course, depending on the location of the plug, the flame will have closer obstructions to run into as it burns and plays out but the greatest volume is always burning over toward the piston and down the cylinder as shown in the video. Any flathead with the same general shape would burn the mixture like in the video.