Jeanine Tesori and George Brant’s “Grounded,” which Washington National Opera premiered on Saturday, is headed to the Metropolitan Opera next year.The young mezzo-soprano Emily D’Angelo has a wide grin, haunted eyes and a mellow, confident voice that flashes with lean anxiety. In tone and presence, she’s driven, intense, wry. Onstage she’s unsentimental — and unsettled.She is, in other words, perfectly cast as a swaggering fighter pilot turned dissociating drone operator in “Grounded,” which Washington National Opera premiered on Saturday at the Kennedy Center.“Grounded,” which will open the Metropolitan Opera’s season next fall, originated as a one-woman play a decade ago, when the ethics of drone warfare were at the center of national attention. Written by George Brant, the play traveled widely, and had an Off Broadway run featuring Anne Hathaway, who at one point was planning to star in a film adaptation.But opera swept in first. The Tony Award-winning composer Jeanine Tesori, known for intelligently audience-pleasing musicals like “Fun Home” and “Kimberly Akimbo,” took on the project through the Met’s commissioning program.Tesori and Brant expanded the piece, giving the anonymous pilot a name (Jess) and giving voice to other characters, including Jess’s beleaguered husband and the cacophonous “kill chain” of commanders she hears over her headset. Washington National Opera was eventually brought on as a kind of out-of-town tryout for Michael Mayer’s production.This led to some unwelcome news coverage earlier this year, when Washington announced its season — sponsored by the military contractor General Dynamics, a longtime company donor. The headlines wrote themselves: A drone maker was paying for a “killer drone opera.”The production, directed by Michael Mayer, with set design by Mimi Lien, is dominated by LED screens.Scott SuchmanThe company put out a statement insisting that benefactors had no role in the work’s creation. But it was still a little surprising to hear Timothy O’Leary, the general director in Washington, thank General Dynamics, alongside other major givers, from the stage at the Kennedy Center before the performance on Saturday.The opera begins in Iraq, where Jess is doing her best “Top Gun” impression as a hotshot F-16 pilot. (The F-16 was developed by General Dynamics.) The quietly ominous rumble at the start of Tesori’s score gives way to a chorus of fliers whose stentorian march morphs into a neo-Baroque fugue.The Middle East is suggested by rustling rainsticks, part of a big, varied percussion section, and some modal harmonies; Jess’s voice soars as she sings of “the solitude, the freedom, the peace” she finds in the sky. Tesori’s lyrical ease and eclecticism, the fluidity with which she blends, blurs and moves between styles, are impressively on display, guided with a sure hand by the conductor Daniela Candillari.On leave with her squadron in Wyoming — the pretext for some whispers of swaying cowboy hoedown music — Jess falls in love with a rancher, Eric, and gets pregnant. (The brief duet when she returns to let him know, her profane apologies melting into shared happiness, is perhaps the most charmingly natural moment in the piece.)Her pregnancy, and the birth of their daughter, takes her out of her beloved cockpit. When she wants to return to the skies, she is instead assigned to drone duty — appropriately enough in Las Vegas, the capital of American not-quite-reality.However demeaning for a onetime star pilot, the job will let Jess go home at night, and she is promised by her commander that “the threat of death has been removed” — a mantra taken up by Washington National Opera’s excellent chorus with grim fervor. The Trainer (Frederick Ballentine, his tenor frighteningly shining) describes the Reaper drone’s capabilities and exorbitant cost in a worshipful call-and-response, religious-style chant.Tesori smartly conjures the uncertainty with which Jess begins to learn her new task, with an orchestral landscape of eerie, jittery spareness. Missile explosions happen with uncanny, anesthetized sweetness, a soft choral “boom.”The assurances that this will be “war with all the benefits of home” go awry, of course, as Jess’s professional and domestic lives begin to collapse together. On a trip to the mall with her daughter, she grows paranoid that they’re being surveilled by cameras, just as her Reaper spies on its targets. A double, Also Jess (the forbiddingly pure-voiced soprano Teresa Perrotta), emerges for duets of slippery dissonance as the tension ratchets up.Ratchets up, but not enough. The impact of “Grounded” is surprisingly unexplosive. This may be because Tesori is at heart a composer of normality — even (or especially) when abnormal things are happening, like the accelerated-aging disease at the center of “Kimberly Akimbo.”D’Angelo as Jess, the fighter pilot turned drone operator.Scott SuchmanHer 2003 masterpiece, “Caroline, or Change,” was a perfect marriage of her music with a text, by Tony Kushner, that steadily maintained its reserve amid heartbreak. Her previous opera, “Blue” (2019), about police violence, emanated a sad, wounded dignity. Tesori is at her best mining emotion from this dignified reserve — from the everyday.But “Grounded” is more surreal — and eventually psychotic — material, and Tesori and Brant don’t pursue Jess’s dissolving mental state with the relentlessness, economy or extremity of, say, Berg’s “Wozzeck.” While it’s understandable that the Met would want a single-actor play expanded into something more traditionally grand, the bagginess is palpable in the transition from an 80-minute monologue to a two-and-a-half-hour opera.Eric, for one thing, remains a cipher. His arias feel more like the result of post-workshop notes — “flesh out Jess’s husband” — than emotional imperative or importance to the plot. While the tenor Joseph Dennis is affable in the role, his chemistry with D’Angelo is nil. Besides the messianic Trainer, the stylized characters of the drone operation — the Commander; Jess’s teenage partner, the Sensor; and the “kill chain,” amplified over loudspeakers from offstage — are insufficiently vivid.And while Jess’s ambivalence and troubles are clearly depicted, the storytelling, especially in the second act, is too busy to build the necessary claustrophobia, despite D’Angelo’s talent and earnest commitment. “Grounded” should come as a sobering shock, with the laser-guided horror of a Tomahawk, but for all the touches of churning darkness in the music, it’s oddly gentle.In Mayer’s swiftly shifting if not quite elegant staging, much of Mimi Lien’s set is dominated by LED screens. The projections have been designed by Kaitlyn Pietras and Jason H. Thompson, who did similar work on the triptych “Proximity,” which premiered earlier this year at Lyric Opera of Chicago.On the screens, in impressive high definition, we see blue skies rushing past, nighttime mountains, a sonogram, the grayish desert landscape observed from above by the Reaper drone’s pitiless eye. And we see the Reaper stretched across the stage, as rivetingly chilly as an empire vessel in “Star Wars.” On our first encounter with it, there’s even a shiver of sinister John Williams in Tesori’s score.Yet it is a little pat to describe “Grounded” — as Peter Gelb, the Met’s general manager, did in an interview in May with The New York Times — as an “antiwar opera.” It is not exactly that, even if it culminates (spoiler alert) in Jess intentionally crashing the $17 million Reaper because she hallucinates that her target’s daughter is her own.The opera implies that old-fashioned fighter piloting is nobler, and better for soldiers’ mental health, than the video-game-style drone deployment that has expanded the battlefield to encompass, potentially, all of us. Darkly, given the state of global affairs lately, the piece seems to say that war is OK; there are just better and worse — more and less authentic — ways of waging it.GroundedThrough Nov. 13 at the Kennedy Center; kennedy-center.org. More