You don't need an airfoil shape to produce lift. Angle of attack is jet plane diesel 500 main factor. However, jet fuel tends to have poor lubricating ability in comparison to diesel, which increases wear in fuel injection equipment. Advanced Component Engineering. No new plabe can be posted. A design as efficient as this almost can't be noisy by definition.

However, there is no tax regulation in the Chicago Convention to refuel the aircraft before departure. The Chicago Convention does not preclude a kerosene tax on domestic flights and on refueling before international flights. Kerosene tax can be levied throughout the European Union on domestic flights and between Member States according to the Energy Taxation Directive.

General health hazards associated with exposure to jet fuel vary according to its components, exposure duration acute vs.

Evidence of the health effects of jet fuels comes from reports on both temporary or persisting biological from acute, subchronic, or chronic exposure of humans or animals to kerosene-based hydrocarbon fuels, or the constituent chemicals of these fuels, or to fuel combustion products.

The effects studied include: cancer , skin conditions , respiratory disorders , immune and hematological disorders , neurological effects , visual and hearing disorders , renal and hepatic diseases , cardiovascular conditions, gastrointestinal disorders, genotoxic and metabolic effects.

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Propeller governor Propeller speed reduction unit. Because generating lift on a fuselage is throwing energy away. A fuselage -- any fuselage -- has a very low aspect ratio , and its induced drag that's the drag penalty occurred specifically because you're generating lift is inversely proportional to the aspect ratio.

Lift belongs on the wing. Incidentally, this effect is where the expression "going ballistic" comes from. If you pitch an airplane nose-down enough to make the lift go to zero -- which puts you in a ballistic trajectory -- the induced drag goes.

It depends on your speed. If you're flying slowly the induced drag dominates and you want to have as high aspect ratio wings as you can to minimize that. As you get going faster induced drag drops and parasitic drag increases, with lower aspect ratios becoming optimal.

One of its main design constraints is maintaining laminar flow. Laminar flow across the body means that it won't be more noisy than a puller. Same thing as with Piaggio P It is quite noisy, though in cruise it doesn't really matter and the cabin noise is allegedly reasonable. People who fly private care far more about looking good than fuel efficiency, which is another reason I think sales will struggle, because it's basically fugly.

Yeah, that kind of appeal. If you lower the cost to the level of commercial travel, you've picked up millions of potential passengers. You have zero knowledge about the aviation market. There are plenty of places where people commute by flying, such as Vancouver. In these places an air taxi service using this airplane would make lots of money. Basically there's already a huge market for this in air taxis..

The article says "eight times lower fuel consumption". That just sounds totally implausible. Powered air transport is already highly optimised. As far as I know, the fuel usage per passenger mile of an airliner is about the same as for a car. The fuel usage for an aircraft looks big, because of the greater distances traveled. Perhaps this new vehicle coasts on thermals, like some birds do, but I saw no Jet Jointer Planer 500 suggestion of that.

The article says "18 to 25 miles-per-gallon fuel economy". If fuel efficiency were truly improved 8x, then that would go a long way toward making battery-powered flight more likely. Possibly dumb question, but isn't the problem here less one of fuel efficiency and more one of energy density? Regardless of overall fuel economy I thought the problem was that the weight of the batteries needed to support powered flight was simply so much more than the equivalent weight of avgas due to the lower energy density of rechargable battery cells.

A typical airliner already has the same miles-per-gallon economy as a car, per passenger mile, when the plane is reasonably well occupied and flying in normal conditions. The eight times efficiency improvement just looks like bad engineering analysis.

An 8x reduction would be huge. GA aircraft are generally quite inefficient, much less efficient per passenger-mile than commercial airliners.

This thing promises to bring airliner efficiency to General Aviation, which would be quite an achievement. I think they will be successful, their physics and engineering is proven, it just wasn't ever used all at once in one design, not even in the Piaggio P because it used turboprops rather than diesel engines.

That comparison is best-case to worst-case. A diesel engine does get far better fuel economy than gasoline at the cost of additional weight , but even then the 8X improvement claim is in comparison to small planes with jet engines, which are among the least fuel-efficient ways to fly.

I was basing my gallons-per-passenger-mile on an article I read some time ago, regarding incremental improvements in passenger aircraft aerodynamics. I would admit that a small jet aircraft would be far less efficient than a fully laden airliner.

How much of a fuel consumption problem are small private jet aircraft? I am guessing pretty much negligible, compared to airliners. I need to look up the efficiency advantage of diesel versus petrol engines. I do not think it is very big. There is a theoreti. There may be more comments in this discussion. Without JavaScript enabled, you might want to turn on Classic Discussion System in your preferences instead.

Check out the new BlockFi credit card that offers 1. Slashdot Apparel is back! Do you develop on GitHub? You can keep using GitHub but automatically sync your GitHub releases to SourceForge quickly and easily with this tool and take advantage of SourceForge's massive reach. Follow Slashdot on LinkedIn. A mysterious bullet-shaped plane was spotted at the Southern California Logistics Airport near Victorville in April Its unusual design prompted immediate speculation, with military website The War Zone being the first to report that the aircraft was the work of California-based Otto Aviation -- and that development was very much under wraps.

Now, in the late summer of the strangest year in aviation history, the Celera L has finally been revealed to the world , with the launch of a new website and a bunch of very cool new photos.

What we're looking at is a six-person private craft that promises to fly at jet speeds, but with eight times lower fuel consumption, and a range that's twice that of a comparably sized craft. Bold claims indeed. Otto Aviation says on its website that 31 successful test Jet Plane Diesel Generator flights have so far been performed, with aerodynamic efficiency proven in , bolstering its declaration that "the Celera L is the most fuel-efficient, commercially viable aircraft in existence.

This discussion has been archived. No new comments can be posted. Full Abbreviated Hidden. More Login. Go look it up North American Aviation P Mustang [google. Re: Score: 3. So yea.. Incidentally, the Mustang could also fly at "jet speeds" apparently, as defined by TFS. Re: Score: 2. Not really relevant.

This is about maximizing laminar flow across the fuselage. Not wings. Lots of work was done before on laminar flow, but the problem is manufacturing the plane and wings with the very close tolerances required to avoid turbulance starting up. Problems that will happen in practise is that anything from bird poop and ice, to the wakes of other aircraft, can severely disrupt the air flow. The body has no lift?

Score: 2. The photos look interesting: Long-awaited Celera L 'bullet' plane is finally revealed [cnn. Re: Score: 1. You know something we don't? It does provide lift. Evidence: the wing position Score: 5 , Insightful. Parent Share twitter facebook. Values vary greatly Score: 3. It would be good to know more about the design. Thanks, Ray. Everyone: AoA is Angle of Attack [wikipedia. A long time ago I worked on a flight line. But I was completely unaware that an aircraft could be designed that way.

It would be good to know more about the design of the Celera, and why that design was chosen. You can indeed make toys with symmetrical wings. The article explicitly mentions a v12 sat at the back. Suspect the fuel's in the wings but engine and gearbox at the rear offsets the pilots up front. I agree about the wing loading. In the first photo [cnn. Two red flags Score: 2.

There are two things that make me doubt whether this plane will make it to market. Laminar flow is not magic or new. Things like bugs, rain, turbulence, and high angles of attack can convert laminar into turbulent flow. A V diesel engine probably does not have the best power-to-weight ratio.

If it did, other piston planes would be using them. A turbine engine might be better. If the plane is flying at higher speeds, it will have to fly at higher altitudes, and a turbine engine is more efficient a.

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