Temperature is everything in a jet engine. For all practical purposes they operate at red line and metal fatigue occurs beyond that temperature. If you exceed the operating temperatures for emergency power you’re looking at an engine inspection on the turbine side.
I can’t find it at the moment but when NASA used the SR-71 for research they needed to push the speed beyond the engine’s rated power and it drove the Time Before Overhaul down to a few hrs.
I had a car with 11.5-1 compression which required water injection to keep,it from detonating. It does this by cooling off hot points in the engine that might trigger detonation. The water was mixed with the fuel and air in the carburetor.
In aircraft it’s not just used to add mass to the exhaust but it also cools the turbine blades. When blade temp is the limiting factor in engine power, this allows you to run at higher RPM and create more thrust.
I’ve flown out of that airport - on the island of Saba. (The wind noise indicates a normal state of affairs: 20+ kts out of the east, and thus pretty much right down the runway.)
Saba is an unusual place: small (~5 sq miles) with its highest point around 3000’. The roads are ferociously steep - there are places where as a pedestrian you can reach out and touch the pavement ahead of you. Walking northeast, you crest a hill, the airport comes into view, and you realize that if you were in a plane you’d be WAY too high for a normal pattern & landing.
Another aviation record set:
Ugh - too bad:
It’s nice to see there are some of the records left to break.
I am surprised 19 is the youngest though. While flying a plane takes a lot of learning and skill I don’t see why a 16 year-old couldn’t do it.
In the U.S., you can solo when you’re 16; but you can’t get a Private Pilot license until you’re 17. 
Anyone have a spare $5million? Plus lots to cover operating costs.
I do love flying boats…
Brian
I paddled up to, and around, that aircraft in my kayak on Sproat Lake on Vancouver Island a bunch of years ago.
A followup as to my earlier post:
Remarkable pic:
It’s not the youngest. The yougest was 18 year old Travis Ludlow.
I’m not sure why but I suspect the Chinese are more interested in the F-35 than the F-22. the last time I saw the 2 planes flying together at Oshkosh there were 2 people taking pictures at the end of the runway. They had very expensive telephoto lenses. The F-22 took off and they didn’t take a single picture. The F-35 too off and up came the cameras. As soon as it made a few maneuvers they walked away. It was all business.
https://www.cnn.com/2022/01/31/tech/alice-eviation-test-flight/index.html
Alice will be able to fly for one hour, and about 440 nautical miles. The plane has a max cruise speed of 250 kts, or 287 miles per hour.
Help me with the math, here. If it can fly 440 nm in an hour, then its max cruise must be 440 kt. If its max cruise is 250 kt and it can fly for an hour, then its range is 250 nm.
Are they considering emergency reserves in case they have to divert?
So, it will only really fly routes of 250nm but, in a pinch, can fly 440nm?
I really do not know. 100% WAG here.
Now that I think of it, there’s probably a ‘maximum range’ speed that is much less that 250 kt that will allow it to fly 440 nm.
The full first sentence of that CNN quote:
I think this is saying that the plane can fly for an hour on a half-hour charge. The mention of 440 nm is probably just sloppy reporting - other sources give this as the max range (which surely - as with all aircraft - comes at substantially less than max speed).
someone from CNN was riding on that plane when they started typing the sentence and after 250 nm someone else finished it.
Now I’m curious what sort of charger it uses. Is that thirty minutes of charging on something like a Tesla Supercharger, or thirty minutes on a connection already available at any airport? I know the majority of passenger terminals have electrical connections that can power the plane while it’s parked at the gate, so it seems like the smart thing would be to design the plane to charge off of that existing infrastructure, but I have no idea what sort of voltage and current those can supply.
Not sure if this is the best place, but I’m interested in this crash-on-takeoff and wondered if anyone had any insights on the video. It’s a Cessna Silver Eagle, brand new turboprop conversion with about 2 hours on the engine, pilot is totally new to turboprops.
Video is not great quality. Wheels up at about 0:00 or 0:01 (hard to guess exactly). Things went wrong incredibly fast. At about 0:06 he stops climbing, at 0:09 he’s inverted and impacting terrain. RIP 2 adults and 2 kids.
My admittedly uneducated guess is that after he left ground, he intended to reduce throttle, made some error with the inputs (maybe pulled the conditioning lever instead). Then he overcorrected and got way more torque than expected, rolling to an inverted attitude with no time or altitude to recover. (Again just my wild-ass guess from a bit of Googling similar incidents).
Any thoughts on what happened here? The NTSB final report for N128EE isn’t out yet, but the comments in the preliminary report hints that the post-crash fire was too intense to leave much useful evidence, so I’m not hopeful for much new information there.