Re the above ad. It's interesting on a bunch of levels.
1. It gives the power to propel the car at 55 mph  15hp.
2. It gives the lift forces at front and rear at 100 mph  46 and 105(!)lbs, respectively.
3. From the above, and knowing the projected frontal area, we can work out the front and rear lift coefficients, and so work out lift forces at all speeds.
4. It states that the lateral centre of pressure is behind the centre of gravity, so we know it has decent straightline stability
5. It shows the centreline surface body pressure measurements, including in the wake (but not, unfortunately, under the car) so we can see how much of the upper surface of the car is experiencing low pressure (ie lift  see #2 above.)
Good ad!
