thanks Otto!

[chad502ex]

a-bit-o-history!

If it wasn't for the German Scientist Nicolous Otto in 1876, where would be today?

[chad502ex]

here's a link for more info

http://en.wikipedia.org/wiki/Otto_engine

[chad502ex]

here's an excellent read on crankshaft balancing

http://www.babcox.com/editorial/ar/eb10330.htm

[chad502ex]

i love how the article above explains that when ppl install an aftermarket piston 28grams away from OEM in either direction (lighter or heavier) the crankshaft becomes unbalanced by a centripetal force over 14lbs.


And ppl wonder why their crank bearings are getting abused when they install an aftermarket piston that has an effect of swinging a 14lb hammer on the crank bearings at 4000 times per minute (2000 rpm).

[iceracer65]

wouldnt it be more than 10000?

a "revolution" is only counted on the power stroke.

[chad502ex]

Originally posted by iceracer65
wouldnt it be more than 10000?

a "revolution" is only counted on the power stroke.

changed.

[h-bomb450R]

Originally posted by chad502ex
changed.

huh?

[chad502ex]

Originally posted by h-bomb450R
huh?

no worries.


check out this animation I slowed down to show the next generation desmodromic valve setup that controls the valves position from another cam lobe, rather than using spring tention from keeping the valve from lofting over the center lobe.

[chad502ex]

blue arrow represents the first inertia force and the red one the second inertia force