Ted Y Posted July 13, 2012 Share Posted July 13, 2012 I didn't want to hijack Parker's engine build thread, but I wanted to share something I did related to piston speeds. As you know Formula 1 is near the pinnacle of technology in engine development. Back in 2003, I read an article about how the BMW Racing team developed their engine. The article stated they were very proud that for the 2003 season, their engine was a 3 liter V10 design which had a maximum racing RPM of 19200 and the piston sustained a maximum piston speed of 40 meters per second (which equals 7872 feet per minute maximum). The article further stated their piston sustained a maximum acceleration of 10,000 times the force of gravity at maximum revolutions per minute. I was always curious about the bore vs stroke for such a small displacement, high revving engine, but they always kept that secret. I grabbed my old Dynamics book and realized I could solve for bore and stroke by two methods, using angular velocity and again by piston acceleration. Please note, I found a typo on Page 1. It says VA and VB are parallel, when clearly it should be written VB and VC are parallel. Enjoy and discuss! Link to comment Share on other sites More sharing options...
Tactician Posted July 13, 2012 Share Posted July 13, 2012 Welp, add this to my list of "SHIT I CANT COMPREHEND" 1. Throwing a Frisbee 2. Stock Market Trending 3. Whatever was just posted here Link to comment Share on other sites More sharing options...
Ted Y Posted July 13, 2012 Author Share Posted July 13, 2012 Cliff notes version: the pistons are very wide, have a very short stroke, and move very, very fast. Link to comment Share on other sites More sharing options...
StevieG Posted July 14, 2012 Share Posted July 14, 2012 Eh.... I've just checked out my brain for the night Link to comment Share on other sites More sharing options...
P51tj Posted July 14, 2012 Share Posted July 14, 2012 Cliff notes version: the pistons are very wide, have a very short stroke, and move very, very fast. Better! Link to comment Share on other sites More sharing options...
Extender32 Posted July 14, 2012 Share Posted July 14, 2012 Mr. Yoder, You have way too much time on your hands my friend. Link to comment Share on other sites More sharing options...
stormy96 Posted July 14, 2012 Share Posted July 14, 2012 OH BOY i think that hurt lol Link to comment Share on other sites More sharing options...
Two Fangs Posted July 14, 2012 Share Posted July 14, 2012 Ted, that is fantastic! I really like how you graphically depicted the difference between acceleration and velocity. That can be a hard thing to explain. Kudos to you, sir. Link to comment Share on other sites More sharing options...
Ted Y Posted July 14, 2012 Author Share Posted July 14, 2012 Thank you. If I had graphic skills, a computer animation of a rotating assembly would help. Link to comment Share on other sites More sharing options...
MOTV8 Posted July 14, 2012 Share Posted July 14, 2012 Holy Arthur C. Clarke, well done sir! Link to comment Share on other sites More sharing options...
TheCMSH Posted July 14, 2012 Share Posted July 14, 2012 Yeah, well, here's what I think Link to comment Share on other sites More sharing options...
Dvl4evr Posted July 14, 2012 Share Posted July 14, 2012 Link to comment Share on other sites More sharing options...
theChad Posted July 14, 2012 Share Posted July 14, 2012 Engineering paper makes everything look brilliant! Link to comment Share on other sites More sharing options...
Tim Posted July 16, 2012 Share Posted July 16, 2012 Great Stuff Ted. Love math!!! I can boil it down a bit more: = Link to comment Share on other sites More sharing options...
zook62 Posted July 19, 2012 Share Posted July 19, 2012 That's an excellent write up. I first learned the concept of maximum piston velocity in Thermodynamics(oldly enough), then once I took Dynamics and Dynamics of Machines it was all much more clear. Much like you, I find it enjoyable to solve stuff like this... Unfortunately what I do for work at the moment doesn't ask it of me in the slightest, so I would have scratched my head a bit before diving into it with the right approach Link to comment Share on other sites More sharing options...
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