Okay, I'll ask. In the b/w photo of the engine being run -- what's the stream of smoke/water/whatever being emitted by the little tub at the front of the photo and into the tunnel? I doubt that it's a smoke trail to look for bumps in the aero, and if it's cooling water -- why not all around the engine?
Just checked with Joe the engineer who's working on the control box for the jet - here's the answer...
The engine has an oil system for lubrication. The oil its self as it passes round the engine becomes aerated, these bubbles of air need to be removed for correct function of the lubrication system. That pipe is the air that gets removed from the oil and dumped overboard, however the air removed also contains small amounts of oil in it, this is what gives it its colour. We will do the same on the car, there will be a pipe over board for this.
