Unither Bioélectronique Completes World’s First Piloted Hydrogen-Electric Helicopter Circuit Flight

Unither Bioélec­tron­ique (UB) has com­plet­ed the world’s first pilot­ed hydro­gen-elec­tric heli­copter cir­cuit flight, which rep­re­sents the next step in a devel­op­ment pro­gram led by UB and in col­lab­o­ra­tion with Robin­son Heli­copter Com­pa­ny.

Con­duct­ed on April 10th at Roland-Désour­dy Air­port in Bromont, Québec, UB test pilot Ric Webb at the con­trols, the flight advanced UB’s hydro­gen-elec­tric heli­copter test­ing from hov­er demon­stra­tion to a full air­port traf­fic cir­cuit, includ­ing con­trolled take­off, climb, pat­tern flight, approach and land­ing.

The flight was con­duct­ed under an exper­i­men­tal flight per­mit, using a Robin­son R44 test air­craft equipped with a hydro­gen-elec­tric PEM fuel-cell-bat­tery archi­tec­ture and pow­ered by local­ly pro­duced green hydro­gen.

The flight builds on UB’s ear­li­er world firsts com­plet­ed in March 2025: the world’s first flight demon­stra­tion of a pilot­ed hydro­gen-pow­ered heli­copter, Canada’s first pilot­ed hydro­gen-pow­ered flight, and the suc­cess­ful val­i­da­tion of Pro­ton Exchange Mem­brane (PEM) hydro­gen fuel cell tech­nol­o­gy to sup­port the demand­ing pow­er require­ments of a ver­ti­cal take-off and land­ing (VTOL) pow­ered-lift pro­file.

The test flight was con­duct­ed as part of Project Pro­tic­i­tyTM, a col­lab­o­ra­tion between UB and Tor­rance, Cal­i­for­nia-based Robin­son Heli­copter Com­pa­ny announced in August 2024.

Project Pro­tic­i­ty aims to accel­er­ate the devel­op­ment of zero-emis­sion heli­copters based on Robinson’s proven R44 and R66 heli­copter mod­els. Robin­son is con­tribut­ing engi­neer­ing, tech­ni­cal, and reg­u­la­to­ry exper­tise as UB advances test­ing toward future cer­ti­fi­ca­tion path­ways with Trans­port Cana­da Civ­il Avi­a­tion and the U.S. Fed­er­al Avi­a­tion Admin­is­tra­tion.

Mikaël Car­di­nal, Vice Pres­i­dent, Pro­gram Man­age­ment & Busi­ness Devel­op­ment, Organ Deliv­ery Sys­tems for Unither Bioélec­tron­ique, said: “This mile­stone shows that pilot­ed hydro­gen-elec­tric ver­ti­cal flight can move from the­o­ry to repeat­able, safe, real-world test­ing.

“For Unither, the goal is clear: build the air­craft and aer­i­al logis­tics sys­tems need­ed to help deliv­er man­u­fac­tured organ alter­na­tives to patients in need, while cre­at­ing a scal­able zero-emis­sion trans­porta­tion net­work.”

The flight test was also a mile­stone for par­ent com­pa­ny Unit­ed Ther­a­peu­tics’ com­mit­ment to sus­tain­abil­i­ty in its oper­a­tions. Unit­ed Ther­a­peu­tics is work­ing to deliv­er an unlim­it­ed sup­ply of man­u­fac­tured organ alter­na­tives to patients using a ver­ti­cal­ly inte­grat­ed logis­tics chain with a low­er envi­ron­men­tal impact than con­ven­tion­al trans­porta­tion options.

Unither’s plat­form is also aligned with next-gen­er­a­tion liq­uid hydro­gen sys­tems, a crit­i­cal step toward unlock­ing the extend­ed range and pay­load capa­bil­i­ties required for future health­care, emer­gency response, and region­al logis­tics mis­sions. The next mile­stone for the pro­gram is scal­ing this hydro­gen-elec­tric archi­tec­ture to the more capa­ble Robin­son R66 plat­form.

As the nation­al indus­try asso­ci­a­tion for Advanced Air Mobil­i­ty in Cana­da, the Cana­di­an Advanced Air Mobil­i­ty Con­sor­tium (CAAM) rec­og­nizes this mile­stone as the next trans­for­ma­tive moment for the aero­space sec­tor. UB is a nation­al board mem­ber of CAAM.

JR Ham­mond, Exec­u­tive Direc­tor of CAAM, added: “Unither’s progress is the kind of account­able, oper­a­tional work Cana­da needs to lead the next era of avi­a­tion. Hydro­gen flight is no longer a dis­tant con­cept sit­ting on a roadmap. It is fly­ing, com­plet­ing cir­cuits, being test­ed, being learned from, and being built into a path­way for health­care, emer­gency response, and region­al logis­tics.

“CAAM’s role is to help ensure that the ecosys­tem around this tech­nol­o­gy — reg­u­la­tion, infra­struc­ture, invest­ment, and pub­lic trust — moves with the same urgency.”

Unither’s suc­cess reaf­firms Canada’s grow­ing lead­er­ship in clean avi­a­tion, under­lin­ing the nation’s poten­tial to be a glob­al test­bed for next-gen­er­a­tion aero­space tech­nolo­gies.

By advanc­ing from first flight to cir­cuit test­ing, Unither is mov­ing hydro­gen-elec­tric rotor­craft from demon­stra­tion toward a more repeat­able flight-test pro­gram.

For CAAM, the achieve­ment rein­forces Canada’s oppor­tu­ni­ty to serve as a prov­ing ground for clean avi­a­tion tech­nolo­gies that could sup­port future health­care, emer­gency response, and region­al logis­tics mis­sions.