Survival mode flight (jetpacks, hang gliders, planes)

[deathcap]

voxel-fly adds flight, its very useful but more focused on "creative mode", e.g., you double-tap space to fly, space to ascend, shift to descend, mainly for building or browsing creatively. Another plugin adding flight for "survival mode" (that is, adding more restrictions, challenge, and a means to acquire it 'legitimately') could be neat, too. Some ideas:

• Hang gliders - unpowered, but descend very slowly, no fall damage, quick horizontal movement. See: the OpenBlocks mod for MC; Cube World Hang Glider
• Jetpacks - better for vertical flight, slow horizontal movement, some kind of power to ascend, fighting gravity to descend (or: hover mode). IndustrialCraft electric jetpack (another mod for MC)
• Airplanes - most complex; entities you would build and mount, probably requiring fuel, careful steering, controls. Could be quite cool, though. Relevant MC mod: Flan's Mod
• Antigravity suit - like creative mode voxel-fly, but with a high power (of some form) requirement
• others?

http://reddit.com/r/feedthebeast/comments/1yghz3/how_do_all_the_forms_of_flight_compare_besides/