On 23 September Heart Aerospace unveiled the ES-36, a 36-seat series-hybrid regional, and said JSX had converted a 2023 letter of intent into a deposit-backed buy of 50 aircraft plus rights on 50 more. That is a real customer with a real network. A public-charter flying from small terminals on ERJs and ATRs, the kind of map that might use 125 miles of battery plus reserves or 745 miles with the turbogenerators lit. Heart also said the type keeps the ES-30’s maximum takeoff weight and battery capacity while adding six seats and 1415 pounds of payload about 20 per cent more people and freight, on a shorter 95-foot wing and two 1.65-megawatt motors instead of four. First pre-production metal is in Los Angeles. Target first flight is the second half of 2028, Part 25 and service in 2031. United and Air Canada had backed the earlier design. Heart has not, in the material reviewed, published how those older papers move.
'More payload' is not a slogan on a hot afternoon. Six extra bodies need bags or they do not. Reserve energy still has to sit in the same battery mass. Hybrid range helps the long sector. The short electric hop still pays for climb, heat and a go-around. A Santa Monica or Napa strip that liked the ES-30’s footprint now meets a heavier cabin on the same certified weight. If the numbers hold, JSX gets more revenue seats per turn. If they do not, the trade is bags off, passengers off, or a runway that suddenly looks short. Forty per cent lower operating cost than a CRJ-class regional is a target, not a shop visit.
A redesign is progress only if the old orders still mean something. Certification evidence collected against a 30-seat, four-prop layout does not automatically stamp a 36-seat twin. Suppliers, weights and the flight-test article change. Deposits on an ES-30 idea become an ES-36 negotiation.
Our takeaway is that 'when an electric aircraft gets bigger, which promise gets smaller either range, or hot-day field length, or battery life, or the delivery year the first customer circled?