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<blockquote data-quote="rhody" data-source="post: 796207" data-attributes="member: 1605"><p>I was just playing around trying to figure out how far the pistons in this little bugger travel in miles at peak rpm 14,000 rpm</p><p></p><p>I got the engine specs <a href="https://www.bikez.com/motorcycles/bmw_s_1000_rr_2010.php" target="_blank">here</a>:</p><p></p><p>The stroke is 2 inches</p><p></p><p>5280 feet / mile * 12 inches per foot = 63360 inches per mile</p><p></p><p>14000 rpm / 60 seconds per minute = 233.33 revs per second * 2 inches per stroke = 466.66 inches per second</p><p></p><p>466.66 inches per second * 60 seconds = 27999.6 (rounded 28000 inches in one minute per piston)</p><p></p><p>28000 inches per minute per piston / 63360 inches per mile .44191 mile per piston that the piston has traveled assuming one minute at 14,000 rpm</p><p></p><p>28000 inches per piston * 4 pistons = 112000 inches for all four pistons / 12 inches per foot = 9333.33 feet total travel for 4 pistons, can you say wear fast / wear hard ?</p><p></p><p>Even at 7000 rpm that would be 9333.33 / 2 = 4666.66 feet again almost 80% of a mile at cruise, amazing...</p><p></p><p>And you wonder why race engines only last a few races before needing rebuild.</p><p></p><p>Rhody...</p></blockquote><p></p>
[QUOTE="rhody, post: 796207, member: 1605"] I was just playing around trying to figure out how far the pistons in this little bugger travel in miles at peak rpm 14,000 rpm I got the engine specs [URL="https://www.bikez.com/motorcycles/bmw_s_1000_rr_2010.php"]here[/URL]: The stroke is 2 inches 5280 feet / mile * 12 inches per foot = 63360 inches per mile 14000 rpm / 60 seconds per minute = 233.33 revs per second * 2 inches per stroke = 466.66 inches per second 466.66 inches per second * 60 seconds = 27999.6 (rounded 28000 inches in one minute per piston) 28000 inches per minute per piston / 63360 inches per mile .44191 mile per piston that the piston has traveled assuming one minute at 14,000 rpm 28000 inches per piston * 4 pistons = 112000 inches for all four pistons / 12 inches per foot = 9333.33 feet total travel for 4 pistons, can you say wear fast / wear hard ? Even at 7000 rpm that would be 9333.33 / 2 = 4666.66 feet again almost 80% of a mile at cruise, amazing... And you wonder why race engines only last a few races before needing rebuild. Rhody... [/QUOTE]
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