Flap overhauls elytra flight. Instead of fireworks you use hunger to fly.

Hold W to glide forward faster. Look up to gain altitude, that's where it costs hunger. Look level or down and it's just normal gliding, no hunger drain.

The camera tilts into your turns to make it feel more responsive.

If you install Trinkets-Updated you can wear the elytra in the cape slot and keep your chestplate for something else.