The Vertical Flight Society's 77th Annual Forum & Technology Display is the world's leading event on vertical flight technology — everything from advanced rotorcraft to advanced air mobility.The Early Bird discount deadline is this Monday evening, April 12 at 11:59 pm EDT (GMT-4)!Register by this deadline and save up to $150!Check out the virtual Forum program overview, technical paper schedule and more! Forum 77 spans five days — May 10-14 — and includes nearly 250 technical papers on every discipline from Acoustics to Unmanned Systems, as well as dozens of…