Well, for starters, in FET the sun is not over the equator in the northern hemiplane summer.
It's NOT! But Tom clearly says the where the sun points down it is hottest. That has to be the equator.
He writes;
"The question, "why is the equator warmer than the poles" may be answered by the following illustration:--
When sunlight shines from overhead (on left), one square foot of sunlight falls on one square foot of ground. When it shines at a shallow angle (on right), each square foot of sunlight spreads out over many feet of ground."
Now is he going to say that the hottest parts of the planet are not indeed the equator?