I am student pilot and there's a lot of literature on "if there is more heat and humidity, then I need a longer takeoff and reduced rate of climb" and many variations of this statement (e.g. cold and high elevation, etc). But it's all sort of a bit confusing to me.
In the resource I linked above, it says that high temperatures mean the air is less dense but high humidity can add to the pressure so overall the density pressure is increased I need a longer takeoff. But why wouldn't the higher temperatures and humidity not cancel each other out?
I was wondering if someone could perhaps break it down as follows:
- Hot temperatures, high/low humidity, sea level
- Hot temperatures, high/low humidity, high elevation
- Cold temperatures, high/low humidity, sea level
- Cold temperatures, high/low humidity, high elevation
For the 8 above conditions, what is the general effect in aviation for take-off, landing, and rate of climb?