I am researching piston engine operation with constant speed propellers. I have before me a book "Pooley's Multi-Engine Course" by Mike Woodgate and appear to have come across an anomaly.
On page 19, Exercise 22 Part 4B it states:
"when (air) density is greater than the ISA an excess of engine power available to propeller power required will occur. Conversely when density is less than ISA then insufficient engine power will be available compared to propeller power required as illustrated in Figure 4."
However, from my reading, Figure 4 appears to show the opposite. At densities above ISA the dotted line showing propeller power required is clearly drawn showing higher power than the solid line showing engine power available.
Can anyone please clarify?