Bye Aerospace Flies Conforming eFlyer 2 Electric Trainer for the First Time

Bye Aerospace has flown the conforming prototype of its eFlyer 2 electric trainer for the first time, opening the flight-test phase of a programme that has run for well over a decade. The aircraft, serial number 001, took off from Centennial Airport near Denver on 17 September with Chief Test Pilot Elliot Seguin at the controls.

The company announced the flight on 24 September. Chief Executive Rod Zastrow said the first flight “exceeded all of our expectations in terms of aerodynamics, handling, propulsion and overall performance”, adding that there were no maintenance discrepancies during the sortie. Seguin said the aircraft “handled well” and validated years of engineering and test work.

A long road to a conforming aircraft

Earlier eFlyer 2 prototypes flew in 2018 and again in 2019 in a configuration close to production. The aircraft that flew in September is different in one important respect: it is the conforming prototype, built to the design that will be put forward for certification. That is the airframe the FAA and the company will use to demonstrate compliance, rather than a proof-of-concept demonstrator.

The programme has also changed suppliers along the way. The flight was the first in-aircraft use of magniX’s Samson300 battery system, which is rated at up to 800 volts and 300 Wh/kg. The aircraft is driven by a 125 kW electric motor.

What the eFlyer 2 is designed to do

The eFlyer 2 is a two-seat trainer built from a lightweight composite airframe. Bye Aerospace says it offers endurance of more than two hours with a recharge time of under 30 minutes, and claims operating costs up to 80 percent lower than a conventional training aircraft, with no in-flight emissions.

Suppliers named in the company’s release include Safran Electrical and Power, magniX, Siemens, Toray, Garmin and Sensenich Propeller, among others.

Certification and customers

Bye is pursuing certification under Part 23, Amendment 64. The company has not announced a firm delivery date. On the commercial side, Skyborne Airline Academy has signed for 30 additional aircraft.

The flight matters beyond Bye. Flight schools in the United States and Europe are watching whether electric trainers can deliver the short-sortie, high-utilisation economics that training demands. A certified, charging-ready aircraft would let academies test that claim on real circuits rather than in brochures.

The next steps are an expanded flight-test envelope with the conforming aircraft and the formal compliance work the FAA requires. Bye has not published a schedule for either, so timelines for type certification and first deliveries remain open.

For the wider electric-aviation sector, the flight is a data point rather than a verdict. A five-minute-class evaluation sortie says little about endurance, battery thermal behaviour over repeated cycles or maintenance burden, which are the numbers training schools will ask for. Bye has said the next phase is expanding the envelope and building the evidence for certification, and those results will determine whether the 80 percent cost claim holds up in daily use.