Bert Hucks

Hey Andy, Correct, lift occurs due to air flow over the wings. The crux is that the conveyor won't keep the plane stationary. The motive force comes from the jet engines moving a mass of air in the opposite direction. The wheels are just free-wheeling. Two surfaces meeting at the same speed have zero rotational friction. So, the moving belt is only doubling the friction inside the wheel bearings, which are engineered to have extremely low friction in the first place.

@HucksBert @engineers_feed And, by the way, I'm not disagreeing with you, I'm genuinely asking.

We should all get the same answer folks 💪🏼

@karlloslejackal @engineers_feed 😂🤣😂

@HucksBert @engineers_feed Really?? You have clearly have absolutely no grasp of physics do you!😂😂😂

@MichaelAmplatz @engineers_feed There is almost zero tire friction. If the two surfaces are meeting at the same speed, then their is no rolling friction, only static friction which has no force. The rolling friction is all in the wheel bearings.

@HucksBert @engineers_feed Just guess every time the wheels get faster, the belt would accelerate too. This is not "some" friction, this would be massive I guess.

Hey there, good questions. 1) I think if it's actually a 747 it might be dicey. The min take-off speed is 120kt and the tires are rated to 205 knots. There is probably a good bit a safety margin in the tires, but it's anyone's guess. If it's a smaller plane with a lower take-off speed, it will surely take-off. 2) The belt will "exactly match the wheel speed". The issue is speed is always relative to a fixed object. In this case it has to be a fixed point external to both the plane and belt. Given that W=wheel speed belt speed = -W. If the wheels are moving at W from right to left then the delta between wheel and belt is equal to 2W. The wheels just have to free-wheel twice as fast.

@HucksBert @engineers_feed Okay. But two questions and I really don’t know the answer so this is not a trick. 1. Can a 747’s wheels and tires actually withstand a takeoff at 2x normal rotation speed and 2. Would the wheels max out at 2X or does this hypothetical cause a logarithmic infinite speed rot’n?

@PrivateButtz @J_R_Sastre @engineers_feed The conveyor doesn't prevent forward movement. The wheels just freewheel(spin) twice as fast.

@HucksBert @J_R_Sastre @engineers_feed Aren’t we forgetting about lift here the engines generate trust but with the conveyer belt preventing forward motion and air flow around the wings it couldn’t lift off the ground

@RandelLentz @engineers_feed Hey Cuz, I'm a Lentz also. It says "can" it take off, not "will".

@HucksBert @engineers_feed The original post doesn’t say anything about the engines thrust. All it talks about is the conveyor belt and the wheels. It doesn’t even state, that the engines are running. It just says it’s sitting on a conveyor belt

@Joe_Public78 @engineers_feed youtube.com/watch?v=YORCk1…

@HucksBert @engineers_feed This is incorrect.

@SkipMagnificent @engineers_feed youtube.com/watch?v=YORCk1…

@HucksBert @engineers_feed Physics is hard. Dude, it cannot move forward and it cannot take off

@Brabakbengel1 @engineers_feed The engines push the plane through the air, not the wheels. This creates airflow over the wings. If this weren't the case, how would the plane fly after it's no longer touching the ground.

@HucksBert @engineers_feed Hell no! What air flows over the wings, which then generates the lift?

@KarlJStanley @engineers_feed The engines push the plane through the air, not the wheels. This creates airflow over the wings. If this weren't the case, how would the plane fly after it's not longer touching the ground.

@HucksBert @engineers_feed It wouldn't, there's no airflow over the wings, therefore no lift.

@JohnAllum16 @engineers_feed The plane would not remain stationary. The wheels will just spin twice as fast. The engines push the plane through the air, not the wheels. If this weren't the case, how would the plane fly after it's not longer touching the ground.

@HucksBert @engineers_feed You need sufficient airflow over the wings to create lift the engines create the power to accelerate the plane to a speed that creates the airflow to create lift

@ErieLetner @engineers_feed The plane would not remain stationary. The wheels will just spin twice as fast. The engines push the plane through the air, not the wheels. If this weren't the case, how would the plane fly after it's not longer touching the ground.

@HucksBert @engineers_feed No, the plane won't take off because air isn't flowing over the wings and other lifting surfaces. Therefore, no lift is generated.

@TimUniqueName @engineers_feed The plane would not remain stationary. The engines push the plane through the air, not the wheels. If this weren't the case, how would the plane fly after it's no longer touching the ground?

@HucksBert @engineers_feed How does the thrust from the engines increase the airspeed flowing over the wings when the plane is remaining stationary due to the treadmill setup? If this worked I don't think aircraft carriers would use catapult systems.

@carininet @engineers_feed Interesting point, Alessandro. The wheels will accelerate at most to 2x their typical RPMs at the take-off speed. I guess it would depend on which type of plane and the quality of the tires.

@HucksBert @engineers_feed Even if you have enough airspeed the wheels can burst before takeoff, due to excessive rotational speed

Yes, the would compete, but the engine thrust is vastly larger than the friction created by the wheels. The wheels will accelerate at most to 2x their typical RPMs at the take-off speed. Also, during the take-off roll, the lift of the wings would be constantly lowering it's weight on the wheels and the friction from the wheels.

@HucksBert @engineers_feed Wouldn’t the engine thrust and conveyor constantly compete causing the wheels to go faster and faster until they lift off? Since the conveyor seems rigged to instantly match the speed I imagine the wheels accelerate to a speed that critically overheats the wheel bearings.

@engineers_feed The air mass leaving the jet engines creates an equal and opposite force, which causes the plane to move forward. Physics.

The plane would take off. The thrust comes from the air being pushed from the engines, not from drive wheels. The conveyor is the length and width of a runway, NOT as depicted. There would be some added resistance from the rotational friction of the tires and the bearings. This may be somewhat offset by lift from the increased "headwinds" generated by air moment imparted by the increasing faster conveyor belt.

@engineers_feed Additionally, the tire friction will decrease as the plane's forward speed increases due to wing lift increasing as more and more air passes around the wing.

@ftwftrc @NASAArtemis The ultimate selfie

@NASAArtemis THANKS TO EVERYONE AT NASA FOR ALL THOSE INSANE IMAGES! what a time to be alive...i'm fucking in love with this one!😭🥹

The eclipse from Orion. On April 6, external cameras attached to the Orion spacecraft's solar array wings captured the Moon backlit by the Sun during a solar eclipse.

@kniborg @MikeEdm36933086 @KirkLubimov I think that would just make the party leadership even stronger, since shorter terms shift power away from individual representatives and toward the hurd.

@MikeEdm36933086 @KirkLubimov Term limits might actually address this problem

This is the best part from Pierre Poilievre appearance on the Diary of a CEO podcast; "Those who push a socialist ideology have a gross contradiction in their view of human nature. They say that human beings are wretched, self-interested, greedy when they’re in the private voluntary economy, but they’re angels when they’re in the governmental economy. They argue that the government should just control everything because then we have all these angels that will decide for us." 🎯