Bye Aerospace
Bye Aerospace designs and markets all-electric aircraft (eFlyer 2, eFlyer 4, eFlyer 800) for flight schools and aviation training operators, selling directly at $745K per unit with 80% lower operating costs than piston trainers.
- Company typePrivate
- Founded2007
- HeadquartersEnglewood, United States
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What Bye Aerospace does
Bye Aerospace is a Colorado-based aerospace company founded in 2007 that designs, develops, and markets all-electric aircraft for the general aviation and flight training markets. Its product line consists of the eFlyer 2 (two-seat trainer), eFlyer 4 (four-seat advanced trainer and air taxi), and the in-development eFlyer 800 (eight-seat regional commuter), all built on a shared clean-sheet architecture centered on a 125kW single-moving-part electric motor, a ~90 kWh battery system enabling 2+ hour flight endurance with sub-30-minute recharge, an all-composite non-corrosive airframe, and a Garmin G500 TXi digital avionics suite. The company is the first-ever applicant for FAA 14 CFR Part 23 Amendment 64 all-electric certification, with design and test plans already accepted, positioning it to potentially field the world's first certified all-electric Part 23 training aircraft.
The company operates a B2B direct-sales model targeting flight schools, aviation colleges, and airline-affiliated training academies. Aircraft are sold on a unit-pricing basis, with the eFlyer 2 listed at $745,000 and an operating cost of approximately $35 per flight hour — an 80% reduction versus legacy piston trainers at $158/hour. As of Q4 2025 the order book stood at 1,124+ aircraft across the product line, representing over $1.4 billion in potential revenue and spanning four continents with 49% of orders international. Named customers include Spartan College of Aeronautics and Technology, Skyborne Airline Academy (40 aircraft / 30 additional under LOI), Flex Air Flight School, and KLM Flight Academy.
Bye Aerospace is privately held and founder-controlled under Chairman & CTO George E. Bye, with CEO & President Roderick C. Zastrow and CFO & Corporate Development Ken Klassen. The management team combines USAF aviation backgrounds with international banking and capital markets expertise. The company has disclosed approximately $32.85M in funding across four rounds since 2012, and has established a global supplier ecosystem including Safran (electric powertrain) and Composite Approach (carbon fiber airframe and EASA-certified electric engine) to support FAA-certified development and future production scale.
Bye Aerospace firmographics
Firmographics- Name
- Bye Aerospace
- Legal name
- Bye Aerospace
- Website
- https://byeaerospace.com
- Company type
- Private
- Founded year
- 2007
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Bye Aerospace designs and markets all-electric aircraft (eFlyer 2, eFlyer 4, eFlyer 800) for flight schools and aviation training operators, selling directly at $745K per unit with 80% lower operating costs than piston trainers.
- Ownership category
- akta.pro rank
Bye Aerospace industry classification
Industry- Product category
- Electric Aircraft
- NAICS
- Aircraft Manufacturing (336411)
- SIC
- Aircraft (3721), Aircraft & Parts (3720)
- akta.pro primary industry
- Training & Light Sport Fixed-Wing Aircraft Manufacturing (IMABAAAE)
- akta.pro secondary industry
- Business & General Aviation Aircraft Manufacturing (IMABAAAC)
Keywords
Where Bye Aerospace is headquartered
LocationHeadquarters
- HQ city
- Englewood
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Bye Aerospace business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Technology or R&D, Personnel, Operations, Marketing or Sales, Others
Revenue model
- Aircraft Sales: Sale of all-electric training aircraft (eFlyer 2, eFlyer 4, eFlyer 800) to flight schools, universities, and aviation operators. Aircraft priced at $745,000 for eFlyer 2 with orderbook exceeding 1,000 aircraft representing over $1.4 billion in potential revenue.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Multi-year contract | eFlyer 2 - Two-seat all-electric trainer aircraft |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels3 records
Bye Aerospace product offering
Product offeringCore offering
Bye Aerospace designs, develops, and manufactures the eFlyer series of all-electric aircraft (eFlyer 2, eFlyer 4, eFlyer 800) purpose-built for flight training and regional aviation. The aircraft feature 125kW electric motors, composite airframes, Garmin G500 TXi avionics, and sub-30-minute recharge capability. The company sells directly to flight schools, aviation colleges, universities, and commercial aviation operators globally.
Product overview
Bye Aerospace offers the eFlyer series of all-electric aircraft purpose-built for flight training and regional aviation. The portfolio consists of three models: the eFlyer 2 (two-seat trainer), eFlyer 4 (four-seat advanced trainer/air taxi), and eFlyer 800 (eight-seat regional commuter). All models share a common clean-sheet electric propulsion architecture designed for the training mission, featuring Garmin avionics, composite airframes, and zero-emission operation at significantly reduced operating costs compared to legacy piston aircraft.
Differentiator
Problem solved
Functional benefit
Brands
- eFlyer 2: Two-seat all-electric training aircraft with 125kW motor, sub-30 minute recharge time, and Garmin G500 TXi avionics suite.
- eFlyer 4
- eFlyer 800
Products and services
- eFlyer 2 A clean-sheet two-seat all-electric training aircraft with 125kW (167HP) motor, ~90 kWh battery capacity, under 30-minute recharge time, and Garmin G500 TXi avionics. Designed for flight training with zero emissions and up to 80% lower operating costs than legacy piston trainers. Priced at $745,000 with operating cost of $35 per flight hour.
- eFlyer 4 A four-seat advanced trainer and air taxi variant sharing the zero-emission, low-cost operating profile of the eFlyer 2 with greater range and passenger capacity for commercial aviation use.
- eFlyer 800 An eight-seat all-electric aircraft being developed by Bye Aerospace for regional commuter operations, extending the eFlyer family beyond training into commercial aviation use cases.
Quantifiable outcome
- 80% lower operating costs: $35/hr vs $158/hr for legacy trainers
- +4 more outcomes
Companies that use Bye Aerospace
Customer profileNamed customers4 records
Segments2 records
Ideal customer profiles2 records
Bye Aerospace technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
AI capability1 record
Feature6 records
Bye Aerospace partnerships and signals
Strategic signalPartnerships
Three partnerships are on record, tiered core.
- SafrancorePartnership with Safran to optimize electric powertrain components for the eFlyer series aircraft. Safran provides electric propulsion technology as part of the global supplier network supporting the FAA-certified development program.
- Composite ApproachcorePartnership with Composite Approach to build the first structural composite electric aircraft for the eFlyer 2 series. Project features advanced carbon fiber technology and an EASA-certified electric engine, representing a significant milestone in sustainable aviation.
- Global Supplier NetworkcoreGlobal supplier network supporting the FAA-certified development program includes companies providing electric propulsion, battery storage, avionics, composite materials, and precision components for the aircraft.
Scale indicators6 records
Recent moves6 records
Expansion highlights5 records
Bye Aerospace competitors and assessment
Company assessmentDirect peers
- Pipistrel: Pipistrel (now owned by Textron) manufactures the Velis Electro, the world's first type-certified electric aeroplane, already in service at European flight schools for pilot training. It is the most directly comparable electric trainer competitor to Bye Aerospace and the only currently certified electric trainer in the world.
- Eviation Aircraft: Eviation is developing the Alice, a fixed-wing all-electric commuter aircraft targeting regional airline operations with 9 passengers. Comparable to Bye Aerospace's eFlyer 4 and eFlyer 800 in applying electric propulsion to fixed-wing aircraft for commercial aviation, though Eviation targets the larger commuter segment rather than flight training.
- Diamond Aircraft: Diamond Aircraft manufactures the DA20 and DA40 piston and diesel trainers, one of the most successful modern flight training aircraft families globally. Direct competitor to Bye Aerospace in serving the flight training market with new-generation aircraft, though with conventional propulsion.
Emerging players
- Heart Aerospace: Heart Aerospace is developing the ES-30, a 30-seat hybrid-electric regional aircraft. Comparable to Bye Aerospace in pursuing electric fixed-wing propulsion for aviation decarbonization, though targeting larger regional aircraft rather than training fleet.
- Voltaero: Voltaero is developing the Cassio hybrid-electric aircraft family for regional and business aviation, including training and utility missions. Comparable to Bye Aerospace in pursuing electric propulsion for fixed-wing aircraft with overlapping use cases in pilot training.
Broad incumbents
- Textron Aviation: Textron Aviation manufactures Cessna and Beechcraft piston trainers (e.g., Cessna 172 Skyhawk) that dominate the flight training market globally, and acquired Pipistrel to enter electric aviation. Broad incumbent comparable to Bye Aerospace in serving flight training customers, with the ability to leverage scale and a now-electric trainer platform.
- Airbus (Electric & eVTOL programs): Airbus is developing electric and hydrogen aviation programs and is a key eVTOL/urban air mobility participant through its subsidiary. Comparable to Bye Aerospace as a broad aerospace incumbent investing heavily in electric flight, though at a much larger scale and broader mission profile.
- Cirrus Aircraft: Cirrus Aircraft manufactures the SR20/SR22 family of piston training aircraft (largest single fleet in flight training globally) and represents the dominant premium training aircraft peer to Bye Aerospace, serving the same pilot training customer base with established aircraft rather than electric.
Others
- magniX: magniX manufactures electric propulsion systems (motors and power electronics) for aircraft, including the motor powering Eviation's Alice. An enabling technology peer and possible supplier/competitor to Bye Aerospace's in-house 125kW electric motor for the eFlyer series.
- Safran Electrical & Power: Safran is both a current Bye Aerospace partner (optimizing eFlyer electric powertrain components) and a major aerospace propulsion and equipment supplier with growing investment in electric and hybrid-electric aviation. Comparable as a strategic supplier and potential future competitor in electric powertrain integration.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Bye Aerospace social profiles
Digital presenceBye Aerospace compliance and trust
Trust signalCompliance1 record
Bye Aerospace financial estimates
Financial estimateRevenue estimate
Valuation estimate
Bye Aerospace leadership team
Management profileNumber of profiles
Profiles3 records
Bye Aerospace funding detail
Funding detailFunding overview
Funding rounds4 records
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Bye Aerospace M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Bye Aerospace
What does Bye Aerospace do?
Bye Aerospace designs, develops, and manufactures the eFlyer series of all-electric aircraft (eFlyer 2, eFlyer 4, eFlyer 800) purpose-built for flight training and regional aviation. The aircraft feature 125kW electric motors, composite airframes, Garmin G500 TXi avionics, and sub-30-minute recharge capability. The company sells directly to flight schools, aviation colleges, universities, and commercial aviation operators globally.
Is Bye Aerospace a public or private company?
Bye Aerospace is a private company. It is classified as venture growth investor backed and is currently operating.
When was Bye Aerospace founded?
Bye Aerospace was founded in 2007. It employs 11 to 50 people.
Where is Bye Aerospace based?
Bye Aerospace is headquartered in Englewood, United States, in the North America region.
How does Bye Aerospace make money?
One revenue line is on record: aircraft Sales.
Who are Bye Aerospace's main competitors?
Direct peers on record are Pipistrel, Eviation Aircraft and Diamond Aircraft. Emerging players are Heart Aerospace and Voltaero. Broad incumbents are Textron Aviation, Airbus (Electric & eVTOL programs) and Cirrus Aircraft. Others are magniX and Safran Electrical & Power.
Does Bye Aerospace have an API?
No public API is recorded for Bye Aerospace.
What industry is Bye Aerospace in?
Bye Aerospace's product category is Electric Aircraft. Its primary akta.pro industry code is IMABAAAE, Training & Light Sport Fixed-Wing Aircraft Manufacturing, with a secondary code of IMABAAAC, Business & General Aviation Aircraft Manufacturing. Its NAICS code is 336411 and its SIC code is 3721.