You are absolutely correct about autorotation and helicopters not falling out of the sky. There is one nuance that the rotor blades still need to be able to rotate for this, and a failed gearbox can prevent that. Anecdotally that feels like the most common cause when I read about another crash in the North Sea.
Not all boots are made the same though. I had some bad luck with a pair of veldtschoen welted boots from the English firm Crockett and Jones in a custom leather. The commando sole split twice at the toe, which they repaired, but after less than five years of wear the lining at the heel had worn through.
I took them in to be rebuilt, but after inspection they said the stiffener had come loose, and nothing could be done. Here have your expensive and now broken boots back.
I'd assumed when I got them I'd be wearing them for decades, and at least a few rebuilds. Maybe there was something wrong with that specific pair, but I did have a goodyear welted sole randomly detach from a pair of six month old city shoes from the same firm. And yes I had been looking after my shoes (frequent cleaning and polishing, always using shoe trees, skipping days between wears, etc).
When I had a pair of Church's fall apart I put that down to them no-longer being a quality brand, but now I don't think you can guarantee a long life just as the shoe was expensive and from a reputable brand. I have many shoes that have lasted better (and now since covid I don't wear polished shoes daily), but that does sometimes feel like luck of the draw.
Some SLBMs (Submarine Launched Ballistic Missiles) use star sighting to correct their trajectory mid-flight. ICBMs launched from silos know exactly where they're starting from, whereas a submarine is both moving, at different depths and has some error to knowing exactly where it is. Missiles use inertial guidance, so knowing your starting your point is crucial.
How accurate a missile needs to be is a whole other dimension though. If the value of a missile is as retaliation to destroy a city (countervalue) then it can be a large warhead and "miss" by quite a margin but needs some form of credible survivability of an enemy first strike. If the missile is to be used to destroy enemy military installations (counterforce) then it needs to be a lot more accurate but usually the implication is as a first strike so less survivability is required.
When you have nuclear weapons that you can drop from manned aircraft, ICBMs from silos and SLBMs controlled by different military branches there is going to be a lot of politics over what the missile is for, which will determine its required accuracy, which will be a factor on if it needs star sighting.
An engine failing on an aircraft, especially a light aircraft, is not a guaranteed crash landing. It is a serious situation, however aircraft usually glide well. This means you have opportunities to find somewhere that is adequate for landing. Many aircraft with engine failures have landed safely on airstrips. Interestingly this is also the case with helicopters due to their ability to autorotate.
When you go around a tight corner and are thrown to one side, what term would you use for the tram's change in motion then?
Deceleration is a useful but non-technical term, like vegetable. A tomato is a fruit which is a tightly defined concept, but it is in this loose category of things called vegetables. It's still useful to be able to call it a vegetable.
From a physics perspective all changes in motion (direction and magnitude) are acceleration, and it's correct to say the designers had to consider acceleration in most (all?) directions when designing the tram. This is including gravity's, as they tend to give you seats to sit on, rather than velcro panels and straps like on space ships.
It is useful to say to your friend in the pub that you got thrown out of your seat due to the tram's heavy deceleration, rather than give a precise vector.
Trolling is a fishing technique [0] of slowly dragging a lure or baited hook from a moving boat, and is likely the meaning that online trolling takes it from rather than a creature from Scandinavian folklore [1].
There's definitely a metaphor to be made for trolling for data, that GP could have been intentionally making. I've certainly seen that idiom used before, although it could have been an eggcorn [2] for trawling.
Boots (a large UK pharmacy chain) sells it, but it's "behind the counter" so you have to ask for it. They will also only sell you one pack of 12 per visit
It's the same for codeine-mixed products. Recently I got denied a simultaneous purchase of pseudoephedrine and ibuprofen/codeine - I was I was only allowed one.
I'm not sure if it's policy, law or I just looked suspicious.
Before the Ballmer/Zune use of the term I remember my father talking about data being squirted to A2A missiles (he was military) prior to launch, so perhaps that is one of the niches.
I take that back. An old issue of Wired had a jargon watch mention of “squirt the bird” as bouncing something off a satellite, which I remembered only because they misspelled it and I wondered what “quirt” meant.
So yeah, maybe that’s a military or adjacent thing.
Interestingly helicopters don't fall out of the sky when they lose power. Air moving over the rotorblades causes lift, as they are after all wings. During normal flight the blades are turned by the engine generating lift in the expected way. If you are already above the ground and start descending, the airflow over the blades as you descend will cause them to rotate and generate lift. This is known as autorotation[0], and allows control over the unpowered descending craft.
It is a normal procedure to be able to safely land this way when power has been lost, and in some ways is safer than a gliding fixed wing aircraft as you don't need a runway to land on.
Of course catastrophic failure is possible in a helicopter where the rotorblades can't turn, and then autorotation won't work. But then if a wing falls off a fixed-wing aircraft, they generally can't be controlled (interesting exceptions do exist like with the Israeli F15[1]).
