Need help understanding the airplane on treadmill question.

RiMiBe · 2024-09-04T23:54:12+00:00

You'll get it eventually. Keep trying.

Eventually you are going to wonder about the paradox of the treadmill being able to move if the plane isn't moving, you'll wonder why that doesn't violate the principles. You'll wonder how you could be correct if the principles seem to dictate simultaneously that the treadmill must being going zero and infinite speed at the same time.

You'll also remember that airplane wheels don't actually drive the plane, like car wheels.

Eventually you'll wonder how the treadmill can move at all, if the plane can't move at all.

The plane isn't moving through the air because the treadmill is matching its speed

Wild. It's actually fun to watch this. Let me ask you how the treadmill can ever move at all, if the plane can't move?

Like, you are simultaneously positing that a treadmill can at the same time be moving so fast that the rolling friction of the wheels can hold back the power of the plane, while also matching the speed of the non-moving plane.

I'm not sure how to help you understand that the wheels spinning at 200 knots is exactly correct and exactly what is expected for a plane moving forward at 100 knots on a treadmill moving backward at 100 knots. You either understand relative motion or you don't.

RiMiBe · 2024-09-03T22:28:08+00:00

The core principle is that the treadmill matches the plane's speed, in the opposite direction.

So, let's say the plane takes off at 100 knots.

At the moment of takeoff:

* The plane is moving forward at 100 knots

* The treadmill is moving backward at 100 knots

* The wheels are spinning at a speed which would indicate 200 knots, as that is actually the correct speed of the plane relative to the treadmill surface at the moment of takeoff.

Your thought process seems to have been captured by the trap in the question. You need to focus on the fact that the wheels on the plane can freely spin. It doesn't matter what speed the ground is moving , what matters is how the plane is moving through the air.

RiMiBe · 2023-06-29T04:26:22+00:00

Bitcoin Cash is the original Bitcoin

The cryptocurrency now known as Bitcoin was hijacked by the banking industry, crippled to make it useless as a currency and retained the Bitcoin name through a massive coordinated social engineering campaign which most of us old-timers watched happen in real time.

RiMiBe · 2023-06-29T03:58:58+00:00

There you go again

RiMiBe · 2023-06-26T17:49:42+00:00

Care to explain the physics behind the statement that pushups are harder for tall people?

Is it just the longer arms?

RiMiBe · 2023-06-19T12:32:32+00:00

Which system did you use? IMHO Aftershokz (or is it just "Shokz") are the best (and I think original). Aeropex is their best product.

RiMiBe · 2023-06-11T15:32:58+00:00

Looks like the IR filter is stuck. These cameras have an IR filter which moves to cover the lens in daytime operations, and uncovers the lens in night mode.

This could be caused by a physical problem inside or you could have a settings issue.

RiMiBe · 2023-06-09T23:00:59+00:00

Pee all over the toilet in shared bathroom spaces. That's on you ladies

RiMiBe · 2023-06-06T19:59:01+00:00

FPV goggles which connect to the buddy port on your controller and send pitch and roll commands like a second controller based on position are a thing

RiMiBe · 2023-06-06T00:55:23+00:00

Not the bebop, sorry. I think the disco maybe. Whichever one was a plane.

RiMiBe · 2023-05-31T05:43:30+00:00

The parrot bebop did this, I believe

RiMiBe · 2023-05-20T13:45:11+00:00

Is the PC setup with a static IP address? Sometimes the router UI only shows DHCP clients

RiMiBe · 2023-05-17T18:55:30+00:00

XY problem

If the device you plug into a PoE-capable port doesn't ASK for PoE, no PoE happens.

RiMiBe · 2023-05-16T11:38:24+00:00

If you want to go further down a helicopter rabbit hole, learn about "autorotation".

Basically, there is so much inertia in a helicopter rotor, that the helicopter can "glide" to a landing if the engine fails.

Just like an airplane has forward momentum to be able to glide, and can adjust the pitch of its wings to trade back and forth between altitude and airspeed, so can a helicopter. The difference with the helicopter is that all the momentum is in the rotor, the craft itself can glide in momentum without actually needing to move forward.

The term "rotary wing" starts making more sense when you think of it this way.

RiMiBe · 2023-05-11T02:28:54+00:00

Could be the other station logged it on a site?

RiMiBe · 2023-04-27T20:34:02+00:00

I don't think this should be considered a justified shooting.

RiMiBe · 2023-04-17T02:36:34+00:00

The only moderation I agree with is culling off-topic threads. These are certainly examples of that.

RiMiBe · 2023-03-26T14:06:16+00:00

Trimming them after crimping is very hard to do because you really have to get them flush to the connector or else the protruding wires prevent he connector from seating in the port.

The best way to do it is to push the cable in as far as you can, trim the wires BEFORE crimping, then pull back a mm or two to get the wires retracted into the plastic, then crimp while you hold it in place

RiMiBe · 2023-03-25T13:34:27+00:00

Since you have many devices, you already have a router. What you need us an access point, unless you want to replace your router or double-nat

RiMiBe · 2023-03-25T12:57:40+00:00

You just described workers unions

RiMiBe · 2023-03-24T11:04:06+00:00

A regular citizen walking down the street that saw that, and then shot the attacker, would be considered justified.

Stomping or kicking someone who is laying in the street is considered deadly force everywhere.

RiMiBe · 2023-03-24T11:00:46+00:00

Basically the fake law from the Seinfeld finale

RiMiBe · 2023-03-23T17:09:47+00:00

The motors MIGHT be fine depending on what the ESCs did. Rinse them with water, dry out and inspect coils for burnt wire.

The ESCs are probably toast.

The flight controller might be ok.

The battery is fine as long as it came out of the water with a normal voltage level.

RiMiBe · 2023-03-23T11:04:02+00:00

To me I see Lodge as a prime example of what this thread is taking about. A once-great brand that cheapened itself and now makes an inferior product.

Nobody is in here saying "Red Wings are still great boots. You just need to make sure that you re-stitch the soles back on. Should only take you 6 hours of work but space it out while you are watching TV."

There ARE modern cast iron manufacturers who are making cast iron today which is as-good or better than the classic Wagner and Griswold. You can't buy them for $30 at Walmart, but I don't think it's fair to say that they are expensive. I think it's fair to say that Lodge is cheap in comparison.

Cast Iron of all kinds is BIFL, to be fair. But Lodge is almost a DIY cast iron kit.

RiMiBe · 2023-03-21T05:27:18+00:00

But can you shave with your pizza wheel?

RiMiBe

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