I'd get one but I have a rule I follow "Never fly a plane that you outweigh"
Posted on 09/19/2021 4:14:52 PM PDT by American Number 181269513
The thrust of a modern turbofan is nearly all from the ducted fan not the gas generator at the core. The split is 75%+ from the fan alone. Same for the unducted fan the majority of the thrust comes from the blades not the gas turbine which has had most of its energy extracted in the turbines to drive the fan be it ducted as in conventional turbofans or unducted propfans. Turboprops work the same way the second fastest and longest range bomber in the world is the TU Bear Russian bomber it is as fast or faster than a 737 and is driven entirely by props at well over 500 mph. How the ducted fan, unducted fan, or prop is spun is irrelevant the thrust is from moving large amounts of air rearward.
The GE90 has a three metre wide fan at the front it takes a 100,000 hp gas generator core to spin it and generates 100000lbs of thrust the gas core is a small fraction of the thrust. That same gas core is used to drive Navy destroyers propellers with zero thrust from the gas core being used to drive that ship. It’s convenient to be able to dump the hot gas directly aft and get some residual thrust out of it in an aircraft but make no mistake modern turbofans are ducted fans first.
I’m willing to bet a month’s mailbox money that Audi has smarter engineers vs luddites in a mancave. Note that with the modular set up only a standard 480v three phase commercial power supply is needed.
https://www.engadget.com/audi-is-testing-high-speed-charging-hubs-lounges-100949218.html
UT Austin the coinventor of the original LI Ion cell is on the task.
https://news.utexas.edu/2017/02/28/goodenough-introduces-new-battery-technology/
Never thought about the energy requirements for a fill up. Since the gas pumps are low pressure then I assume that several gas pumps could operate on a 20 amp circuit.
I guess it already takes a good amount of electricity to charge an electric car overnight. It is interesting who you equate what it would take charge one in a couple of minutes... If that were even possible. Which it is not.
My parents bought the paperback novel for me when I was maybe nine. I still have it, although it’s in three separate pieces; has some nice color stills from the first movie in the center pages. I recall Palpatine being mentioned right at the start, the character who became the emperor; it appeared that he was being controlled by bureaucrats from the way it was written, although there was enough ambiguity to indicate that he was actually running the show.
What? A white guy and a white gal on the task!? It’ll never work.
Well I never claimed to be smarter than the average engineer, but the article you linked says 23 minutes charge time at 270 kW, which is 362 hp. A typical gas-powered car fills in about one-tenth that amount of time, and dumb as I am, 362x10 comes out to 3620 hp, which is within 10% of the number I gave, which was an approximation (note I said "about 4000 hp").
Power calculations typically come out the same whether your in a man-cave like me, or out ridin' tall in the saddle in Marlboro country.
The pump itself uses only a very small amount of power, probably under one horsepower. But with that small amount of power, the pump moves (liquified) energy at a much higher rate.
That's my point. That gasoline is a very space- and time-efficient way of storing and moving energy. You can move a heck of a lot of energy pretty fast with a little electric pump if you're pumping gasoline. Diesel is even better; its energy density is higher than that of gasoline.
Not that many light, 300 MPH airframes out there.
NXT
SX300
Lancair
to name a few...
I'd get one but I have a rule I follow "Never fly a plane that you outweigh"
Roughly 500 HP? We were up against Germany and Japan in the 1930s and didn’t have enough horse power in our airplane engines until we could generate about 2,200 HP to rival their designs for power. 500 HP is useless except for a private light plane. Sure, it’s fun to work with battery technologies, but this means absolutely nothing except to a hobbyist. I’ll stick with oil powered flight for now.
Problem is the weight of the batteries is so high you can only fly it by remote control
Batteries with higher energy densities will be the key that unlocks their potential.
Sounds suspiciously like the same claims made about every other supposed wonder tech
Basically “one day the miracles will happen and we will have x tech at low cost efficiency”
So “geniuses” what the environmental costs of producing, and disposing, of all those magic batteries?
Also electric powered vehicles do not get lighter as the energy is used as with a fueled vehicle.
“The thrust of a modern turbofan is nearly all from the ducted fan not the gas generator at the core.”
Looks like an open prop is more efficient than a ducted fan. Why, then, was a ducted fan ever used. The ducting itself produces drag. Perhaps the ducting justifies itself because it reduces turbulence at the outer edge of the blades.
I could also ask why those fancy wide blades weren’t used years ago.
You got that right. I want one on my hang glider :P WW forever
WW HP and Euro Sport
Torrey Pines, Mt. Laguna, Saboba, Horse Canyon, Little Black, Big Black, Blossom...
That is what I said.
You did, just all the technical data got to me and I stopped reading your post after the 1st paragraph. But great information.
You did, just all the technical data got to me and I stopped reading your post after the 1st paragraph. But great information.
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