Very interesting. Military power; even though 30W starts at about 2210 HP and 34W at 2300 HP, 30W seems to hold power much better than the 34W; if I'm interpreting the charts correctly, that is.
Also, if the only difference between 34 and 34W is the ADI, then I suppose their non-WER charts would be identical, correct?
The -30 is a whole new engine and supercharger, it did keep the same bore and stroke as the -34 though
The -30 was an "E" series engine and it used a hydraulic coupling (DB 600 series style) to drive the supercharger and the supercharger was a different model than the one used on the -34.
It is confusing but the dash numbers do NOT go in chronological order. the -34 is a development of the -22 engine.
There were only two "E" series engines, the -32 used in the F4U-5 Corsairs and the -34 used in a variety of aircraft including the F8F-2 Bearcats. Some planes used water injection and some didn't.
High and low blower refer to the supercharger gears not stages. The variable speed drive on the -30 engine is responsible for the curved/wavy lines on the chart. Engines with fixed gear ratios have straight lines on the charts.