ORIGINAL: piper_chuck
ORIGINAL: opjose
ORIGINAL: piper_chuck
600 revs per minute divided by 60 seconds gives 10 revs per second
4 revs divided by 10 revs per second gives .4 second.
So, assuming the engine was turning 600 rpm, the entire video was .4 second.
You can thank my 9th grade science teacher for this analysis, he's the one who taught me the method of making such calculations. It's easy once you know the method.
Not bad, but I would have estimated a much higher idle. 600 RPM is slow for most 4 cylinder engines.
yes, but 600 divided by 60 gave an easy number to work with in the next step.
There is just one small problem with your calculation, a 4 stroke completes takes only two cycles, not four to complete the process, so by using your calcs the entire video sequence is 0.2 seconds. If you think that is fast, if the engine is rotating at 16000rpm (Formula 1 and some bike engines rotate at this speed) a complete intake, compression, power and exhaust sequence would only take 0.0075 seconds. (and four your 2 stroke .46 engine spinning at 12000 rpm the complete intake, compression, power and exhaust sequence only takes 0.005 seconds)
I really like pointing people to this [link=http://www.keveney.com/Engines.html]webpage[/link] if they want they want to get the basics of how conventional and various other types of more exotic engines work.
Cheers
Pupmeister