air pressure to assist lift on a Race boat We have a 25 ft race hull with Jet drive pump (we race 30+ mile legs), we are hitting sppeds @150mph. lowering the hydronic drag is a challenge, i am thinking about installing a air injection system into the bottom of the boat. If i install 40 holes (20 ) on each side facing down and flush with the water at 1 1/6 or 1/8 in size @50 psi how much lift will this give us? will the injection of air lower the drag?
 A: Penguins use something like an air injection system for emergencies. They stay warm while in water by trapping air under their feathers. When seals chase them they can get an extra burst of speed by squeezing the air out. 
This idea has been used to lubricate the hulls of container ships. 
See this National Geographic article. 
A: At that speed, you're definitely operating an aircraft in ground effect, so issues like balance and decalage must be considered. What that means is, for stability, there is a center of gravity CG, which is somewhat forward of the center of aerodynamic lift, while there is another surface that gives a pitch-up moment with speed. This can be either a tail surface lifting downward, or a forward canard lifting upward. That surface is trimmed for different speeds. There also needs to be a tail fin for yaw-wise stability.
Then you need to account for crosswinds. In aircraft, when they are above the ground, they simply crab. When they are on the ground, they use the wheels' sideways resistance, and then use the tailfin rudder to keep them from turning into the wind. It is worked with pedals.
Also they can roll a bit to the left or right, so as to tilt the lift vector into the wind. So if the wind is from the right, they can use right bank and left rudder, called "cross controlled".
I suspect the boat when in contact with the water has enough keel resistance (which also should be aft of the CG) to counteract side-slip, but you will need the rudder, either water or air or both, to prevent turning into the wind.
But whenever the boat is out of the water, it's an airplane. And even when it's in the water, it's an airplane on a runway. Every pilot has learned the dictum "fly it till you tie it". I suspect your boat driver should take flying lessons.
