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Amazingly, I believe planes are designed/certified to do everything (e.g. take off fully loaded) with only a single working engine.

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And if they loose the remaining one, all goes south: https://www.youtube.com/watch?v=zn1a2lSk_UI&feature=emb_logo

Not if you have Sully in the cockpit [1]. They can still glide.

[1]: https://en.wikipedia.org/wiki/Chesley_Sullenberger

Not very well, though.

Well enough.

https://en.wikipedia.org/wiki/Gimli_Glider

> In 10 nautical miles (19 km; 12 mi) the aircraft lost 5,000 feet (1,500 m), giving a glide ratio of approximately 12:1 (dedicated glider planes reach ratios of 50:1 to 70:1).

> Air Canada Flight 143 came to a final stop on the ground 17 minutes after running out of fuel.

No, planes glide just fine. That plane simply did not have enough altitude, or lift considering the bank angle to recover

Their problem really was a lack of situational awareness / crew resource management.

As they did shut down their perfectly well working engine instead of the broken one. Obviously that’s not improving your situation in any way.

Not true - most planes must abort the takeoff if any engine fails below a certain speed.

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