2bighorn: i'll relook at the numbers. Could have fat fingered something.
wmaker:

.. as for prop eff, bah, who needs it

.... and you're right, the chart is only quasi-serious

.
grizz: meh, guns are overrated unless you've maneuvered to where you can use 'em

. My QPM chart obviously deals with the maneuvering part, not the shooting part.
fox: let me clean it up and I'll make the data available.
cobia / coombs: I'll add the A-20 & 109G-14 when I get a chance to...
karnak: yeah, the Mossie seemed a little out of place to me too. It's what the numbers say, but it mostly has to do with how I'm combining P/W and S/W together. (The P-38 behaves similarly too). This chart, QPM-1 is basically S/W scaled by power along the x-axis. The mossie apparently has power in spades. What it doesn't tell you is a true P/W ratio or true excess power (Ps) which factors in the power-required bit of it. I have a QPM-2 chart that's basis P/W * S/W * P that's interesting that I may post to show the difference.
Ardy: my QPM chart includes proxies for instantaneous turn radius and excess energy for sustained turning. Generally the lower down and to the right an airplane is, the better the turn radius. The more up and to the right, the better the excess energy for sustained maneuvers.