ZeroAvia testbed crash; Lufthansa deploys riblets; MightyFly’s autonomous logistics; Wingcopter’s triple drop; Hydrogen startup funding.

Europe’s industry sees itself in a time crunch for sustainability, but budget negotiations on the Clean Sky follow-on program drag on.

ZeroAvia’s plans to demonstrate long-distance hydrogen fuel cell-powered flight have been set back after its demonstrator aircraft was involved in a landing accident.

Up to five test runs of the rotorcraft are planned by May 4.

Internal production headwinds slow but still persist.

Our roundup of the main aerospace and defense stories making the news this week.

Dave Calhoun is giving himself a dual mandate of returning Boeing to financial eminence while reinstalling engineering prowess. The gambit could decide the embattled company’s fate.

Ask the editors: Longer-haul electric aircraft will depend on better energy storage, higher power densities and greater efficiencies.