very interesting ****!

http://www.engr.colostate.edu/~dga/h...pm_1000fps.wmv

 

Link does not work......

 

hmm, worked for me..............I just re-copied it, maybe it will work for you now

 

works for me. Do you know what springs those were from and the difference. Just wondering.

 

no, I think that just represents what kind of a life valve springs lead

 

I think that this video is illustrating valve spring harmonics. The spring on the left has fewer turns and does not resonate (vibrate sympathetically) at the speeds of 500 to 3,000 cycles per minute (which would be half of a crank speed of 1,000 to 6,000 RPM's. The physics in valve spring design have to be very complex for what appears to be a very simple device on the surface. I know that Comp Cams has a specialist on their staff, Billy Godbold, who has a degree in physics and concentrates on the dynamic forces involved in valve train design (cam lobes, springs, etc.). His job is not to design the cam specs but to research all the things that go into lobe ramp rates, beehive springs, and the like.

Good find on the video!

Steve

 

I was just about to ask what we can learn from this video but looks like you read our minds...thanks steve!!

 

Cool!

 

**** springs, lets go 2 stroke reeds!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

Pretty cool video...the spring on the right sure is vibrating and it looks like it's coil binding also. I didn't get any audio with the video...is there any sound?