I wonder if they're using the fuel return for some of the heat rejection at 65,000 feet.

The thought hadn't crossed my mind until just now. It's how gas turbines cool their oil at altitude- a fuel-oil heat exchanger heats the fuel and cools the oil (good because it puts both fluids at a better working temperature), most of that fuel flow gets returned to the tanks or used in motive flow pumps). Oil cooling for that diesel may not be as demanding as a typical turboprop or jet, maybe there's some capacity in the Celera's recirculated fuel that can substitute for some cooling system capacity.

Or maybe that's a terrible idea...

I'm not sure where to start on the napkin math.

what altitude have they flown it at?

there is a huge shortage of information that isn't advertising copy

another vaporware aircraft like the eclipse?

I don't know if I would consider an aircraft that's flown as vaporware. And Eclipse actually sold airplanes so that's definitely not vapor.

I wonder if they're using the fuel return for some of the heat rejection at 65,000 feet.

The thought hadn't crossed my mind until just now. It's how gas turbines cool their oil at altitude- a fuel-oil heat exchanger heats the fuel and cools the oil (good because it puts both fluids at a better working temperature), most of that fuel flow gets returned to the tanks or used in motive flow pumps). Oil cooling for that diesel may not be as demanding as a typical turboprop or jet, maybe there's some capacity in the Celera's recirculated fuel that can substitute for some cooling system capacity.



Or maybe that's a terrible idea...

I'm not sure where to start on the napkin math.

The PT6 does, I believe it always has. For the latest version, the PT6E-67XP in the PC-12, they increased the flow of warm fuel back to the tanks enough to no longer need Prist.

I don't know if I would consider an aircraft that's flown as vaporware. And Eclipse actually sold airplanes so that's definitely not vapor.

The PT6 does, I believe it always has. For the latest version, the PT6E-67XP in the PC-12, they increased the flow of warm fuel back to the tanks enough to no longer need Prist.

I think the return line in the E1000 only works with the WOW switch just for clearing bubbles out of the fuel lines before engine start. After takeoff, return line stops.

there is a long ways from something you get in the air and one that meets the original goals and advertising and is saleable.

just look at the Eclipse specs when it was first built and flown and what they finally were able to build and sell. and they had investments of something like $1 billion to do it The first one they flew to get the deposits had cruise missile engines with a lifetime of 25 hours. The eclipse was originally priced at $750,000, gross weight of 4000 lbs when it finally flew for customers it weighed 6000 lbs and to make money they priced it at something like $2.15 million

Aviation Week feature article from the other day:

The Celera 500L Just May Revolutionize Business Aviation

Nice update. Thank you for posting.

One good reason that fuselages aren't designed with extensive laminar flow is the conflict of forward visibility & windshield design with a laminar shape. The requirements precisely conflict. Look at the picture below and note the position of the pilot and the forward visibility or lack thereof. Creating any reasonable amount of forward visibility is going to be severely challenging. More challenging than that is having any chance for reasonable optics through a windshield that's canted at that severe angle. The Avanti had substantial challenges in that department and the Celera is far worse. I truly hope they can overcome all the substantial technical challenges they face but I think I'd personally have a real issue flying something with such lousy forward visibility.

It’s an interesting design, for sure, but these guys have a long way to go before we can buy one and “fly it off the lot”… 2025? Ha!

Yes, but it’s the 21st century, do we really need direct visual observation to fly the plane? (Spoiler alert: No, we don’t)

As a pilot I’d like some nice windows to look out of, but for the forward view I’d be just fine with an image from a camera overlaid with a HUD. If the display goes tango uniform I can make like Lindbergh and slip it to short final and land.

Did I read correctly….this is powered by a single 12 cylinder diesel PISTON engine and will sell for upwards of 4 million?

Otto is a dreamer with little chance of getting this plane certified and successful…I.E. profitable.

We NEED dreamers though…
Especially dreamers with money, passion and commitment.

Yeah Otto!

She is missN a forward wing though…jus sayN