oh shit. WebMD finally fixed their symptom checker.

used to be you’d plug in headache and it’d be like…

• You have a headache
• you have a migraine.
• you have a concussion
• you have [a whole lot of scary shit that will kill you]

now it just says “we couldn’t find anything wrong with you”

they forgot to model the aeromethane-spike from the cow fart.

I mean it definitely reduces over all drag.

Too many syllables.

Just saying, we’re idiots over here, and in any case Emantaller cheese sold as Swiss in the US install made here.

For the record… if your shep isn’t occasionally an asshole…. You’re playing it wrong.

(Like on the starter mission, knocking out the researcher. Or the fanboi on citadel.)

Like. Yeah.

Absolutely.

Especially compared to games of the era.

They found a fossilized Anklyosaurus larynx, which is what I 3d printed.

I got the file from a chain of friends passing the STL along, and highly-scientifically printed it in TPU and ran some air through just for the fun of it.

It sounded like a squeaky fart and was worth about of laughter and jokes. My nephew may have been at the age of fart jokes and not knowing when they were dead.

They definitely 3d printed their larynx- I know this because they published the model and I printed it in TPU.

It sounded like a squeaky fart. (But I’m guessing TPU is nothing like the appropriate material.)

At least one of them:

“It cannot be that good”

It just took some crabs a bit longer to get there.

“I’m pretty sure that’s just god trolling everyone. No. Really. Has quite a developed sense of humor.”

“Refined it over eons.”

I dunno. But if you know the authors… ask them where they got the studies.

It’s for my nieces. Honest. I would never get a rainbow cat-oh stop looking at me like that. Of course I blame the nieces…. They get away with everything!

The funny part about this is…

We do know what some of them sounded like. (Well I forget which ones so, maybe they’re not Dino’s, but uh, yeah.) (also, big “maybe” attached. They took 3d scans of what they think are the vocal organs and ran air through a 3d printed version.)

The wheels are attached to the plane so they move at the same time as the plane. But, I get what you’re trying to say, that the wheels are effectively being dragged by the plane, they’re not powering the movement.

no. I’m saying that by the time the wheel is rolling, the plane’s is already moving forward, the engines have already overcome the drag in the wheels. the treadmill is locked to the wheels, not the plane. The plane would continue accelerating even as the wheels reported weird rates of turning.

As for the (very brief) time delay, that’s a function of the plane’s gear’s suspension that is quite well sprung.

the rate of roll on the tire is, effectively, decoupled from the airspeed (and groundspeed) of the plane. which makes this:

No, by definition it’s the same. The conveyor moves with however much speed is necessary to stop the forward motion of the plane.

… entirely different. an affixed anchor does not allow the free motion that a wheel would.

You don’t need to deflate the tires, you merely need to increase the speed at which the conveyor moves to match the speed of the wheels.

And one of a few things happen. Either the plane has enough engine thrust to overcome the acceleration induced by the wheels, and therefore takes off, or it does not.

In the case that it does not, the wheels would continue spinning in increasing RPM until the plane begins moving backwards. because, again, the airspeed of the airplane is not dependent on the wheel’s RPM. Assuming the airplane doesn’t crash from suddenly becoming incredibly difficult to control… eventually it would take off anyhow. because the airflow over the wings would still generate lift. (though they would become horribly inefficient.) and therefore take off.

this is of course ignoring the whole “can a pilot actually control that and manage a take off like that” thing. If you don’t want to grant godlike piloting skills, we could then just make the treadmill irrelevant and leave the brakes on.

If

1 x 0 = 0

And

2 x 0 = 0

Then 1 = 2.

And this folks is why you don’t hire “math teachers” because he was successful football coach. It took him way too long to realize this is why we don’t divide by zero, (more than a week, actually.)

Just to clarify; you understand that because the engines are pushing on the plane itself and not the wheels, by the time the wheels start moving, the plane is already moving relative to ground and air alike.

Which, said another way, this thought problem appears confusing because it’s being considered from otherwise irrelevant reference frames.

An anchor sufficient to keep the plane from rolling forward is different because the force it is apply is significantly greater.

Sure, you can deflate the tires and increase the rate of spin on the wheels. But at that point, you might as well ask “can we creat a scenario where planes can’t take off”

To which the answer is definitely “Yes”,

And as a side note, if we assume the wheels are indestructible, which I’d argue is only fair, then even if what you’re saying is true and we ramp up the drag induced by the wheels sufficient to counter the engines… then the wind generated by the rolling treadmill would be producing a sufficient headwind for the plane to take off. (Remember, the air resistance of the treadmill’s belt moving will accelerate the air some.)

But again, the wheels have almost zero drag to begin with, the speed at which the roll is independent of both the actual groundspeed and the airspeed of the airplane.

If it has the thrust to over come friction at take off speeds, and at standing, then it has enough power to get to take off velocity eventually.

On the other hand, this entire conversation assumes the thrust to weight ratio is less than 1. If it’s more than one, well they just…. Go straight up.

Except it’s not like attaching an anchor. The plane isn’t physically attached.

The wheels will just roll double whatever the current ground speed is. If the plane has enough thrust to take off with the treadmill moving an inverse of its take off speed, then it has enough force to start rolling, too.

At most, the force applied by the treadmill would be sufficient over enough time to lengthen the take off roll, but given enough space to do so, the plane will take off.

To keep the plane from rolling forward; the treadmill would have to be able to apply an equal force as the engines, it can’t do that through the wheels- the wheels can only apply a force equal to their rolling resistance and friction in its mechanics.

You just know some weirdo millionaire is gonna try and train them to go eat heavy metal and shit someplace useful.

And I’m not even mad, probably the most environmentally friendly mining operation…

So, another way to think about it is with Kites.

The air flows around it the same way it would any other kind of aircraft, though they have effectively zero ground speed.

They do differ in that, being tethered, they’re pulled through the air, with the wind providing the energy to stay up.

But they’re still moving through the air, and the airfoils are inducing drag to convert some of that energy into lift.

In both cases, the important speed is relative to the air, not the ground and not the treadmill. The wheels might impart some drag while they’re on the ground, but they’re never going to impart enough to overpower the engines- 747s typically take off at about 75% of their rated take off power, which means a longer take off roll, but less wear and tear.

From the included article-

When it’s time to mate, eels are very determined to make it to their breeding site at the Sargasso Sea. The Sargasso Sea, a two-million-square-mile span of ocean,  is the site in which all freshwater eels mate

It’s way the hell down there in the article, though. Apparently they travel to freshwater as larva.

Eels are freaking weird, man.

A stationary aeroplane on a treadmill will obviously move with the treadmill. I assume an aeroplane moving at like 1 km/h still gets pulled backward by the treadmill.

so, every wheel or ball or any other kind of rolling-thing has rolling resistance, which is how we sum up the total drag on the system. A steel ball bearing on a steel plate will have a significantly lower rolling resistance than, say, a steel cube on that same plate. Tires have some- but not a lot- of rolling resistance.

You can see that in a car, just put it into neutral and watch as you slow down, even on flat ground. Plane wheels also have rolling resistance. it’s just the way our world works. But it’s generally ignored because it’s hard to model perfectly and in any case pretty negligible relative to the amount of acceleration being put out by modern aircraft engines.

A treadmill will only push an aircraft or whatever else along, with an acceleration that is equal to, or lower, than the rolling resistance. If you try to accelerate the plane faster, it’ll ‘slip’, and the plane will remain largely stationary- like the dishes in the tablecloth trick (if you want to try that at home… make sure the tablecloth doesn’t have a hem, heh.)

But, keep in mind you’re thinking about the plane relative to either the ground, or the treadmill’s belt.

the plane’s wings and it’s engines are ‘thinking’ about the plane relative to the air it’s moving through. It’s the airspeed that generates the lift, and the engine isn’t coupled to the wheels, they’re just rolling along doing their thing. (aircraft engines work by taking a volume of air and accelerating it. newton’s equal-and-opposite does the rest.)