The laminar trip is most famously used on golf balls, which are very blunt objects, and there is data from various sources which indicate that it reduces drag by 50%. The questions arise:
Is this useful on a Footy?
What is the best implementation?
How much can be gained?
A Footy operates in the same range of Reynolds numbers as a golf ball, so some improvement might be expected. My recent testing has shown that it can be useful, but this testing is limited to a fairly blunt hull, and it only provided a 4% advantage. It may be less useful on a more pointy hull.
With regard to the best implementation, a golf ball is covered with dimples. Perhaps we need more trips? However, about a year ago I found some data on-line, from a term paper of a student at MIT, who did some drag testing of spheres with a single trip wire. This showed a 50% reduction in drag, the same as the dimples. So no further improvement should be expected from more trip wires. The exact placement, as well as the thickness and width, may be another issue. However, I had found an article on another website which gave information on trip wires, and desired dimensions, which led to the selection of the 0.02" thickness. I have found nothing to suggest a particular width.
Wire vs tape? - It is difficult to get a wire to lay in contact with the hull, so I have used tape. A 3/4" width was selected because it was easy to implement at the pond without any real effort. It might be better to cut it into thinner widths. Most available data seems to use wires.
The objective of the trip is to convert laminar flow into turbulent flow, preventing separation of the flow from the body. Laminar flow separates very easily. Turbulent flow has more drag, but separates less easily. Separated flow has the most drag.
On a blunt object, the flow separates very soon, so the trip needs to be near the front. On a more pointy hull, the flow wil not separate until much later, perhaps around amidships (just a guess), so it is possible that a pointy hull may gain some drag reduction by placing the trip amidships, or even futher aft, to facilitate flow around a dragging stern. This is of interest because the pitch stabiility drops drastically as soon as the stern comes out of the water, so it may be desirable to have a deeper stern, if its drag can be minimized.
Pictures of the flow around a golf ball show separation occuring before the mid-point without dimples, but well after the midpoint with dimples.
The above is based on very limited knowledge, with a little bit of test data. Any comments or suggestions from those more knowledgable in this area would be appreciated.