Ampaire Raises £14m for Hybrid-Electric Aircraft, and Its ‘Boring’ Retrofit Strategy Might Be the Smartest Bit

Hybrid-electric aviation startup Ampaire has raised £14 million in Series B funding to commercialise and manufacture technology that can cut the fuel burned by existing aircraft, with International Airlines Group, the owner of British Airways, investing alongside Alaska Airlines, DiamondStream Partners and other backers. The really interesting bit though isn't another futuristic electric aircraft.... Ampaire wants to retrofit planes that are already flying.

And I actually think that's the smartest option!

Because aviation has spent years showing us concept aircraft, hydrogen aircraft, electric aircraft, flying taxis, weird vertical take-off things and renders of what airports apparently look like in 2045.

• Some of it is incredible.

• Some of it will probably happen.

But there are also thousands and thousands of perfectly usable aircraft sitting at airports right now.

Ampaire's argument is basically:

why wait to replace all of them?

Change what's powering them.

That's nowhere near as sexy.

It might be considerably more useful.

What Has Ampaire Actually Raised?

Ampaire's £14m Series B will go towards commercialisation, manufacturing, supply chain development and the operational capabilities needed to get its hybrid-electric systems into customer aircraft. CEO and co-founder Kevin Noertker says the technology itself has already been demonstrated in flight and the new money is about turning that performance into certified products that can actually be supplied at scale.

The investor list is also probably more important than the £14m headline.

International Airlines Group has invested through IAGi Ventures, its corporate venture arm, alongside Alaska Airlines, DiamondStream Partners and other existing and new investors. IAG owns British Airways, Iberia and Aer Lingus, and Ampaire had already been through IAG's aviation accelerator programme before the investment.

That matters.

I quite like a VC cheque.

I like a cheque from somebody who might actually use your product considerably more!

The Airline Investors Are Probably Worth More Than Just Their Money

This is something founders occasionally underestimate.

The best strategic investor isn't valuable because they've got a big bank account.

It's because they've got customers, engineers, procurement teams, operational data, aircraft, routes and VERY specific problems they desperately want solved.

IAGi Ventures openly says it doesn't only provide money. It helps portfolio companies with product development, market insight, partnerships with its operating companies and access to IAG's network, and says it has previously become the first customer for companies it backed.

For an aviation startup, that's massive.

You could raise £14m from investors who think planes look cool on a pitch deck.

Or you can raise it from companies that operate them every single day and know exactly what changing one component across a fleet actually involves.

I'll take the second one.

And Ampaire has already been working with IAG on a fairly specific problem: hybrid-electric Auxiliary Power Units, or APUs.

Those are the smaller power units at the back of aircraft that keep electrical and other systems operating while the main engines aren't doing that job. IAG has been exploring whether Ampaire's hybrid-electric approach could reduce the fuel aircraft burn while sitting on the ground.

And I LOVE that this is part of the story.

Because it makes the whole thing less futuristic.

They're not saying:

British Airways will be flying an electric 787 next Thursday.

They're looking at a smaller part of an aircraft, finding somewhere electrification already makes practical sense and trying to remove fuel consumption there first.

That's how big infrastructure changes normally happen.

Bit by bit. Brick by innovative Brick.

Ampaire's Bigger Bet: Stop Waiting for Completely Electric Planes

Ampaire's main technology is the AMP-H570 hybrid-electric powertrain, which it is developing for both new aircraft and retrofits.

Its Eco Caravan demonstrator takes the existing Cessna 208B Grand Caravan and combines a combustion engine with electric propulsion and batteries housed in the aircraft. Ampaire claims its target configuration can reduce fuel burn by around 50% to 70% and direct operating costs by as much as 40%, depending on the mission. Importantly, its hybrid architecture doesn't require airports to install charging infrastructure before operators can use it.

That last sentence might genuinely be the entire business case.

No charging infrastructure required!

Because we love talking about technology as though the technology exists completely independently from everything around it.

It doesn't.

• Build an electric car and somebody needs chargers.

• Build millions of electric cars and somebody needs an electricity grid capable of charging millions of electric cars.

• Build electric aircraft and suddenly airports need charging systems, enormous amounts of available power, new operating procedures and aircraft capable of sitting on the ground long enough to recharge.

Ampaire basically sidesteps some of that!

The combustion engine doesn't disappear!

The emissions don't disappear!

But neither does the ability to land at an airport that hasn't spent £20m rebuilding its electrical infrastructure!!

That's a compromise.

And sometimes compromises scale faster than revolutions.

We've Become Slightly Obsessed With "Zero"

This is where I'm probably going to annoy somebody.

I think the climate-tech world sometimes becomes too obsessed with whether a technology reaches absolute zero emissions.

Zero is obviously the goal.

Great.

I'd quite like planes that somehow fly around emitting nothing too...

But there's another question worth asking:

What can we deploy before that exists?

If you can spend the next ten years waiting for perfect zero-emission aviation, or retrofit aircraft and materially reduce their fuel consumption during those same ten years, I'd quite like us to do the second thing while we work on the first.

We've been looking at this same problem from another angle on Startup Networks recently. The UK has just backed a trial using Google AI and Met Office weather forecasting to reduce climate-warming aircraft contrails. That technology doesn't eliminate aviation emissions either, but it potentially tackles a very large source of aviation's climate impact using the aircraft already in the sky. We broke down that £5m aviation contrail project here!

It's a pattern I'm increasingly interested in.

Don't wait for the entire system to be replaced.

Make the horrible existing system less horrible first!!!!!

Then keep going!

There Is a BIG Asterisk on Those Fuel-Saving Numbers Though

Ampaire talks about fuel reductions of 50% to 70%.

Sounds fantastic!

It also says up to 40% lower operating costs.

Also fantastic!

But those are Ampaire's performance targets and claims, not a guarantee that every airline sticking an Ampaire system into an aircraft suddenly cuts its fuel bill by 70%. Ampaire's own Eco Caravan page explicitly notes that listed specifications are development targets and may change.

And this is aviation.

Aviation certification is HORRIBLE.

For good reason.

• If my website crashes, everyone gets annoyed and I have a bad afternoon.

Ampaire did achieve a significant regulatory milestone in May 2025 when the US Federal Aviation Administration approved the G-1 Issue Paper for its AMP-H570. That establishes the certification basis, basically defining the airworthiness and environmental requirements the system will have to satisfy for Supplemental Type Certification. But it isn't final certification!! Ampaire still has compliance work and testing to complete!

The company said last year that it was targeting certification of the AMP-H570 and Eco Caravan by the end of 2026.

Which is.... soon.

Very soon actually.

And I'd definitely be watching that date for all you aviation tech nerds out there! I know I'll be!

Ampaire Has Already Pushed Back Its Certification Timeline

Here's the bit I'd rather not bury.

Back in 2022, Ampaire was publicly targeting 2024 for FAA certification of the Eco Caravan.

That obviously didn't happen.

We're now in August 2026 and the company is working towards a new target of certification by the end of this year.

I'm not saying that as some giant red flag. This is aviation. Certification slips, testing takes longer than expected and, honestly, I'd MUCH rather a hybrid-electric aircraft arrive late than somebody rush a propulsion system because an investor deck had 2024 written on it.

But it still matters.

Especially when this £14m round is specifically about moving Ampaire from demonstrated technology into commercialisation, manufacturing and actual customer deployments.

You can't properly scale something airlines aren't yet legally allowed to operate commercially.

So £14m raised?

Good.

IAG involved?

Really good.

Flight testing?

Great.

Now get it certified.

And £14m Really Isn't THAT Much Money in Aviation

This was another thing that jumped out at me.

£14 million sounds like an enormous Series B if you're building SaaS.

• You could hire quite a lot of developers.

• Buy many ergonomic office chairs.

• Possibly even afford HubSpot Enterprise.

In aerospace?

£14m can disappear surprisingly quickly.

You're dealing with specialised engineering, aviation-grade components, certification, testing, manufacturing, supply chains and regulatory work.

So I don't read this round as:

Ampaire now has unlimited money to electrify aviation.

I read it more as:

Ampaire has raised another chunk of capital to get through one of the hardest bits between prototype and actual product.

And that's arguably what makes the airline backing so important.

This isn't only capital.

It's industry access!

The Retrofit Strategy Could Become Ampaire's Moat

There is something else founders should pay attention to here.

Everyone loves the clean-sheet startup.

Throw everything away.

Build the future from scratch.

Sometimes that's absolutely necessary.

But there's a completely different business model in asking:

What expensive thing does the customer already own, and can I make it dramatically better without forcing them to replace it?

That's what Ampaire is doing.

• Airlines already own aircraft.

• Operators already know how to fly them.

• Engineers already know how to maintain the basic airframes.

• Airports already accommodate them.

• Passengers don't need to learn anything new.

If Ampaire can swap part of the propulsion architecture while preserving enough of everything else, adoption becomes a very different conversation.

• Not cheap.

• Not easy.

• But different.

The Eco Caravan, for example, is based on the existing Cessna 208B Grand Caravan rather than an entirely new airframe. Ampaire's broader strategy is to reuse the same or scaled hybrid-electric technology across additional aircraft platforms.

That means the intellectual property isn't necessarily "our plane".

It's potentially:

"our powertrain can make lots of people's planes better."

I think that's a more interesting company.

This Is Also EXACTLY What Climate Tech Needs More Of

I wrote recently that climate-tech founders need to stop treating climate adaptation and infrastructure as somebody else's problem.

Aviation is a perfect example of why.

• We aren't going to wake up in 2030 and discover everybody has agreed to stop flying.

• We aren't going to replace the global aircraft fleet next week.

So we need layers.

• Better fuels.

• More efficient aircraft.

• Contrail avoidance.

• Hybrid propulsion.

• Better routing.

• Electrified airport operations.

• Eventually much deeper zero-emission technologies.

None of these individually "fix aviation".

That's okay.

Real climate infrastructure probably isn't going to arrive as one beautiful solution.

It's going to be 500 slightly boring improvements stacked on top of each other until the numbers finally become significant.

Ampaire might be one of those layers.

IAG's Interest Is What Makes Me Most Hopeful

The £14m is nice.

The technology is interesting.

But I keep coming back to IAG.

This is a group operating hundreds of aircraft through airlines including British Airways, Iberia and Aer Lingus. Ampaire went through its accelerator, worked with the group on actual use cases and has now received investment from its corporate venture arm.

That's a much nicer sequence than:

• Startup makes PowerPoint.

• Startup raises money.

• Startup spends money.

• Startup starts looking for customer.

Here you've got something closer to:

• Startup builds technology.

• Industry tests relationship.

• Industry identifies potential applications.

• Industry invests.

Now make it work commercially.

That's how corporate venture capital is supposed to work.

Whether it actually leads to Ampaire technology appearing across IAG aircraft is another question entirely. Neither the funding announcement nor IAG has announced some giant fleet-wide rollout.

And we shouldn't pretend they have.

But an airline group putting money into the company after working with it is stronger validation than another sustainability award.

The Thing I Want to See Next

Certification.

Then actual retrofits.

Then fuel data from aircraft operating normal commercial schedules.

Not a perfect test flight.

Not the best possible weather.

Not a press release saying "up to 70%".

Give me six months of boring operational data.

• How much fuel did operators actually save?

• How often did the system need maintenance?

• Did payload change?

• What happened in winter?

• What did pilots think?

• How expensive was installation?

• How long was the aircraft out of service?

And, ultimately..............

Did the operator make more money with Ampaire installed than without it?

Because that's how this scales!

• Airlines care about climate targets.

• Governments care about climate targets.

• Passengers increasingly care too.

But if Ampaire can walk into an airline and say:

This cuts your emissions AND your operating costs.

That's considerably easier to sell than:

Please spend more money because it's greener.

I'm Hopeful About This Ampaire!

Not "electric aviation has been solved" hopeful.

We're miles away from that.

But practical, slightly boring, this-could-actually-get-used hopeful.

Ampaire has flown the technology. It's working through FAA certification. It has strategic airline investors. It's now raising specifically to build the manufacturing and supply-chain capability required to move towards commercial deployment.

That's the bit I like!

And perhaps the biggest lesson here for founders has absolutely nothing to do with aviation.

You don't always need to replace an industry to disrupt it.

Sometimes the bigger opportunity is looking at the billions of pounds of infrastructure everybody already owns and asking:

How do I make that 30% better?

• Less fuel.

• Lower cost.

• Less pollution.

• No need to rebuild every airport.

• No requirement to buy an entirely new fleet.

• It's not a flying taxi.

Nobody's going to make a Hollywood film about a hybrid APU.

But if Ampaire gets this right, airlines might actually buy it.

And I'll take boring technology that gets deployed over revolutionary technology permanently stuck in a pitch deck any day.

Quick Facts!

Too Long; Didn't Read - Give Me The Answers Pls.

What does Ampaire do?

Ampaire develops hybrid-electric aircraft propulsion systems designed for both new aircraft and retrofits. Its approach combines electric propulsion with a combustion engine, allowing operators to reduce fuel use without relying entirely on batteries or needing charging infrastructure at every airport.

How much has Ampaire raised?

Ampaire announced a £14 million Series B funding round on 18 August 2026. The funding is intended to support commercialisation, supply-chain development, manufacturing and operating capabilities.

Who invested in Ampaire?

The round included International Airlines Group's IAGi Ventures, Alaska Airlines, DiamondStream Partners and other new and existing investors.

Does British Airways own Ampaire?

No. IAGi Ventures has invested in Ampaire, but the announcement does not say IAG or British Airways has acquired the company. International Airlines Group is the parent group of airlines including British Airways, Iberia and Aer Lingus.

Is Ampaire's aircraft fully electric?

No. Ampaire's Eco Caravan uses a hybrid-electric system, combining a combustion engine with electric propulsion and batteries. That's partly what allows it to operate without relying on airport charging infrastructure.

How much fuel could Ampaire save?

Ampaire says its Eco Caravan targets fuel reductions of around 50% to 70%, with potential operating-cost savings of up to 40%. Those figures are company claims and development targets, so real-world commercial performance will be important once certified aircraft enter wider service.

Is Ampaire certified by the FAA?

Not fully yet. The FAA approved the G-1 certification basis for Ampaire's AMP-H570 in 2025, which establishes the standards it must meet on the route towards Supplemental Type Certification. Ampaire has said it is targeting certification by the end of 2026.