Airbus and Rolls-Royce hit eject on hybrid-electric airliner testbed
 

I can't find a good aircraft thread to drop this in. www.theregister.co.uk: Airbus and Rolls-Royce hit eject on hybrid-electric airliner testbed after E-Fan X project fails to get off the ground

Best laid plans, eh?

After watching some videos of small aircraft fitted with Corolla engines, it seems like trying a similar approach with a Prius engine wouldn't be impossible. But anyway, I'd only hold my breath for hybrid aircraft to become mainstream as long as they're fitted with a propeller (either piston-engined or turboprop), or the fan is so massive that it requires a reduction gearbox in order to prevent the tips of the blades to break the barrier of sound.

This is only hybrid for test purposes, working toward an all-electric solution.

They flew into an airport they can't fly out of again without the un-tested 4th engine.

cRiPpLe_rOoStEr — Didn't you talk about putting windpower in your grandmother's house? I can't find the thread. :confused:

Anyway I posted something about tuned mass dampers and now it looks like Julian Edgar predicted the future, unless it was more than a week ago.

https://www.youtube.com/watch?v=FPT9dPE4oRs

They can fly it out when the temp drops some. There's a problem with the balanced field calculation and they can't dump fuel load.

Thanks. Good that we're not headed into Summer? :)

I should have focused on the 'beer-keg' sized generator. It came across as negative.

I won't hold my breath for some all-electric aircraft. Pressurizing the cabin with an electric compressor might spend too much more energy than it would be worth bleeding from a compressor of an engine.


I don't remember the thread, but yes, I was talking about that. It was in 2007 that I lurked about it for the first time, never actually tried it. She died in 2015, and I haven't been in her former house more than 3 times since then.

Let's do the time-warp again? :confused:

your thinking inside the box

thinks outside the box
answer:

Air can be stored quite effectively in bottles when the ICE is running

I made housings for the shuttle high-pressure fuel turbopumps at my first job out of school. 71,140 hp shaft horsepower from a pump a little bigger than a Chevy big block. Crazy stuff.

I got to work on the F-22, F-35 and some cool DARPA stuff too:

https://upload.wikimedia.org/wikiped...0295-05%29.jpg

I dunno, seal it up pretty good, and use a submarine system to remove C02 and you could get away with a fairly small tank of O2. The tanks on the space station aren't that big. The pilots have to breathe their own separate air anyways, by law

Sure, but it also adds some weight and complexity. Holding compressed air for the engine starters is a whole different matter than having to store enough air to keep an airliner pressurized while cruising only on the electric motors or gliding. Considering some earlier pressurized aircraft had engine-driven compressors instead of resorting to air bleeding from the engine's compressors, maybe an accessory compressor driven by an electric motor shouldn't be so out of question. But anyway, it wouldn't surprise me if an electric motor becomes a viable replacement for both the reduction gear (when applied) and the accessory gearbox of an airliner engine.

That is crazy... a fuel pump that is 71,140 horsepower. It must be moving a swimming pool amount of fuel in a minute or something.

It would be pretty simple to have an inlet on a high pressure surface of the aircraft provide the higher pressure.

A skyscraper full of fuel and oxidizer in 4 minutes. See https://youtu.be/LbH1ZDImaI8?t=22 for a diagram of the competing open cycle, closed cycle and full flow variants.

The Shuttle burned 535,000 gallons of liquid fuel in a little less than 9 minutes.

According to NASA, each pump (there were 3) would drain a swimming pool in 28 seconds. https://www.nasa.gov/centers/marshal...r/ssme_11.html

The High Pressure Pump (HPLT) was fed by a Low Pressure Pump (LPLT) The LPLT pressurized the fuel to 275 psi and then HPLT increased that to 6515 psi.

Full story here: https://spaceflight.nasa.gov/shuttle...p/engines.html

You mean some sort of ram-air? Doesn't seem so easy to increase air pressure to the same extent now applied to the combined HVAC and pressurizing system of modern airliners.