- #1
gloo
- 261
- 2
I have already asked the question of piston diameter size and efficiency in an earlier thread but i'll recap.
My question was that is it true that the larger diameter piston have a larger propensity to overcome the mechanical loss of fricition due to the piston rings contact with the mating surface inside the piston walls.
The resounding response was yes, but I wanted to clarify 2 factors:
1. Would it matter if the the rings were lubricated by water instead of oil?
2. Would it be correct to express it in a mathematical type proof by using this method:
Circumference formula : pi * 2*radius
Area formula : pi * radius *radius
if we cancel out the constant pi from each equation , we have
circumference forumla : 2 * radius
Area forumla : radius * radius
Thus, for any radius, we can see that the larger the radius, the area formula will have a factor of radius squared, while the circumference formula will only be radius times 2.
Is this a mathematical type of expression we can make to show why larger pistons will be more likely to overcome piston ring friction? The fact that larger radius will have result in a larger area factor relative to the circumference of the piston?
thanks
My question was that is it true that the larger diameter piston have a larger propensity to overcome the mechanical loss of fricition due to the piston rings contact with the mating surface inside the piston walls.
The resounding response was yes, but I wanted to clarify 2 factors:
1. Would it matter if the the rings were lubricated by water instead of oil?
2. Would it be correct to express it in a mathematical type proof by using this method:
Circumference formula : pi * 2*radius
Area formula : pi * radius *radius
if we cancel out the constant pi from each equation , we have
circumference forumla : 2 * radius
Area forumla : radius * radius
Thus, for any radius, we can see that the larger the radius, the area formula will have a factor of radius squared, while the circumference formula will only be radius times 2.
Is this a mathematical type of expression we can make to show why larger pistons will be more likely to overcome piston ring friction? The fact that larger radius will have result in a larger area factor relative to the circumference of the piston?
thanks