When they jump,they basically fall and get lift .
The first wing stroke gives enough for lift off,and than they begin to fall and continue to flap.
This is what the eaglets learn when they start to leave the nest. How to take off and how to land!
I have seen eagles chasing one another and go into thick forest and maneuver like a swallow! I have also heard them crashing through the forest and they have to walk through the bush and come out at the forests edge. They do need alot of room to maneuver! All big birds do.
I’ve seen several of the Monas Island gang hop out at the forests edge after crashing through the forest and then gather their wits and fly off.