I have two questions about "stuff" that I have heard.

First, do modern urethanes react more like reactive resin balls in regards to oil absorption, or more like old school urethane.  To the best of my knowledge old generation urethanes balls did not soak up much if any oil.  So if you were to throw older urethane balls, then would track onto the backend.  The newer urethanes have cores in them and will (when appropriately drilled), continue to flare on the back end.  So do modern Urethanes tend to cause carry-down or behave more like reactive resin balls that tend to soak up the oil?

Second, I hear the term, pushing oil around on occasion.  As in a right handed bowler who is throwing left to right, will "push" the oil to the outside.   Do reactive resin balls, with all their oil absorption ability, and flare actually push oil around?  How does this happen?  Is this like a tire going through a puddle where water would be splashed (or displaced) to either side of the tire?  When I see articles that show the 3-D changes in oil volume, I never see places where they have more oil at the end of the 3 game squad than they do at the start of the squad.  Usually they show a giant valley where oil has been absorbed off the lanes.  So what exactly is going on?

Quote from: ICDeadMoney on November 22, 2016, 08:32:55 PM

Quote from: BMFOBR on May 18, 2015, 08:32:07 PM

Joe Slowinsky has an interesting article on resin balls and oil movement.  Says there is no such thing as carrydown.  Its all oil depletion.  Google it and decide for yourself.  Makes sense.  When a reactive ball hits dry, no matter where on the lane, it loses energy.   It strikes me as odd that so many people say the lanes they bowl on are dry as a bone.  Yet they'll talk about carrydown.  Like I said, google it and decide for yourself what is happening.

The ball doesn't lose energy.

KE = 1/2 * M * V^2 + 1/2 * I * W^2

KE = Kinetic Energy
M = Mass
V = Velocity
I = Moment of Inertia
W = Rev Rate per second

The force from friction causing the ball to lose velocity also causes the ball to increase rev rate.

If the balls linear velocity is slower than its tangential velocity, then the rev rate will decrease as it encounters friction.  Though there aren't many bowlers who can achieve those conditions.

Correct, for those rare individuals who can achieve that, as the rev rate decreases, the linear velocity increases.

It is a myth that your need a 14 or 15 lb ball to be successful as I have 30-40 200s with 10 pound balls.

If anyone has seen a video of you bowling, they would question your characterization of being successful.

Had you started bowling in the days of wood lanes, you wouldn't have 30-40 200 games, because the proprietors would have you kicked out due to the damage you would be doing to wood lanes.

A 15-20 foot two handed shot put is not bowling.

Old urethane balls did not have dynamic cores. Back in the day you could like at a ball that had lots of games on it and narrow line would develop over the players track, of lots of little dents from all the shots.

Since balls did not flare they would pick up oil in the front of lane and deposit it on the back.

New urethanes have dynamic cores, so when they pick up oil in the front, at the back that oil on ball isnt' rolling on the lanes.

So new urethanes will effect lane play like the resins. strip oil and deposit a little on back end in small strips in the few places the oil on ball happens to roll on lanes.

This idea that urethane moves oil down lane and resins strip is a huge misconception. Unless you use and old urethane or a new one w/ very weak drilling or lack of dynamic more. I guess Mix from Storm would move oil down lane, or something else w/ a very weak drilling.

I have a Storm Supernatural and Visionary Crow and they both strip oil.