Visible V8 Testing # 2 Oct 4 2010

Testing Crankshaft # 4 Visible V8. The crankshaft is shown being run in. A Stroboscope is used to monitor the rotating assembly.
The Stroboscope video looks ok on my computer, but not so good on You Tube.
Please see Visible V8 @ 7000 RPM Part 2 (failure) to see the actual failure of crankshaft #3.

Also watch the oil flow from the crankshaft against the oil pan during the Stroboscope testing. It may not be clear here in the video, but it can be seen that all of the crank pins are throwing oil except the crank pin for rods 3 and 4. This is why crankshafts #2 and #3 failed at crank pins 3 and 4. Low or no lubrication above 1500 RPM. This crankshaft #4, will fail too at crank pin 3 and 4 because of this same problem. A new crankshaft is being built that will try to correct this problem. (again)
Fluid dynamics can be hard to deal with at times I am finding out. it seems that a liquid, when given a choice of directions, will usually want to flow the wrong direction, for me anyway. In a real engine, the centrifugal force of the rotating crankshaft pulls the oil to the crank pin to lubricate the rod bearings through a drilled channel. Here, you don't have much to work with.
So this is going to take some time to get it to work right. It is one thing to know what the problem is, another to figure out how to correct it. There is no book on this, I seem to be writing it now, a little at a time,

Category:

Science & Technology

Tags:

• Visible V8