Hi Guys,
So much to do, so little time. I was planning to do a video, but I'm going to have to type this one if I'm going to keep my commitment.
A "ditch" is another name for a blocked lane, also given the euphemism of a top hat or a house shot. So that explains the nomenclature (naming standards).
What a ditch actually is takes a little more explanation. I'll start by talking about oil...
OIL
Centres use oil-based conditioners which we refer to as "oil" for obvious reasons. It's fair to say that you're all aware that oil is slippery stuff, but just in case you didn't know that, now you do. We apply oil to a lane surface which has usually been cleaned with chemicals that break down the remains of the previous coat of oil for easy cleaning. Therefore we can assume that the bits that haven't been oiled are a dry surface.
Oil length - Some people think that it's the oil that makes the ball hook and this is true from a certain perspective. Without head oil, the ball will hook early and roll out quickly. Especially with today's ultra-high friction coverstocks. So oil is required in the front part of the lane to make the ball skid to a point where it can hook. Of course the bowler must impart rotation on the ball to take advantage of this situation. No rotation = no hook, regardless of what's on the lane. If the oil length is long, then there is less dry lane at the back (backend) and less hook. The opposite is true if the oil is short, where more dry backend is present.
Oil Distribution (Ratio) - So if the length of the oil affects the hook, what about the width of the oil? Some of you may be saying "Huh..?" right now, but stick with me. If a bowling lane is oiled with equal amounts of oil on every board from edge to edge, the pattern is said to be flat. The amount of oil on the centre of the lane compared to the, outsides of the lane (near the gutter), expressed as a ratio would be 1:1. This is a very tough pattern and I don't advocate it for anything but the highest level of play. In a Sport Bowling tournament, patterns are laid in a ratio of 3:1 or less. That means that there is 3 times the amount of oil in the middle of the lane compared to the outside and it is blended gradually from centre to edge. Scores are much lower than on house shots, but competition is much closer. Nobody runs away with the event on a sport shot. That said, sport shots are also very difficult and sometimes too hard for a lot of players. In most open events in Australia, patterns with ratios varying between 4:1 and 7:1 are quite normal. Patterns from 5 or 6:1 and higher are considered to be getting easy by proficient bowlers and play like league shots used to. Note: All houses used to play like tournament shots.
BLOCKED LANES
Blocked lanes (ditches, house shots, call them what you will) often use ratios of 8:1 and above. Oil, as a liquid, can't be "stacked" too high. To achieve such a substantial bias in the ratio, you must apply a very low volume of oil on the outside boards of the lane. This provides gross amounts of free hook to the outside of the lane. The ball just bounces back from these dry areas. In the house I bowl league at, you can lean over the foul line and see where the oil stops across the boards. (See the attachment: ditch_photo.JPG)
On this pattern, where almost all the oil is between the 10-boards on each side, the fix is in. If you have very high ball speed or a very low rev rate, you simply play around this "oil line" on 10 board and use the dry boards to the right as a breakpoint. The extra friction to the right provides earlier hook and the big wall of oil provides hold to the left. You have instant area and a lot of dry boards to get more carry from. The pattern overhead shows this. (The attachment Kegel_Easy_Street.JPG is comparable.)
So what's the problem with that..? Well, I'm glad you asked! None at all, if you don't care about needing to bowl well to score well. The average Joe or Joanne can strike all day with a reactive resin ball, a strap-on wrist and a bit of coaching. But answer this question honestly. Is it honest? If you bowled 300 with the bumpers up, should that be allowable? Obviously not. So if the centre lays oil-free parts of the lane that act as bumpers, what's the difference?
I don't advocate tough lanes for everyone to suffer on. I advocate ending this delusion and taking a road in between. Blended patterns of around 5-7:1 (depending on the condition of the lane surface) seem to offer a fair balance between really tough and stupid easy. I just want bowling to respect itself again so it can in turn, get the respect it should deserve as a sport.
Jason