Yes, power isn't the issue - only control of that power.
I have not found anything more than speculation yet, but am very curious. The rules seem extremely specific on computers
and control - to the point of explicitly stating that any data acquisition systems, sensor and electronic controls must be physically separate and completely isolated from any electrical
operation of hydraulic valves and drive clutches.
The purported system has been on Oracle since the beginning and TNZ asked for a ruling in the beginning. The rules committee accepted Oracle's system as legal
. Oracle claims that their boat was remeasured before every race and obtained clean certificates. This doesn't seem like a lie, because it is public that it was so.
Oracle originally gave up on using the system because they could never get it to work. They seemed to go on a crash program to get it working when TNZ was demonstrably faster in the earlier races - particularly upwind.
The one thing that has come out is that Oracle bet BIG on weather
. They made a lot of changes to the boat that required heavier winds to work. Even the control system is speculated to have used smaller foils and require foiling upwind at specific speeds to get better VMG. Any lesser wind
, or flukier wind
, would bring them off their foils and they would lose by a large margin.
You could see this on the upwind leg, where Oracle was foiling at larger angles than TNZ and the VMG was pretty much even until boat speed hit ~28kts. It was only then that Oracle started to walk TNZ upwind at their larger angles.
Perhaps TNZ's largest mistake of the whole series was not pulling their lay-day card and waiting for the next day's light winds.