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Early Access Video - I Have Terrible News About Penguins

🕑 Added 2024-05-16 04:11:28 +0000 UTC

Comments

Rebecca Suits

I know I'm late to join the group since this video, but I would love to go!

Eric J Korpela

Hi, Jason and Clint if he has time to look at these things. I'm late to the game, but I loved this episode. Important thing first... if you're really interested in how dynamic soaring works I'd suggest trying to get in touch with Peter Garrison at Flying Magazine, he might get an article out of it and you might get an episode. Might be a win win. I can do the physics, but Garrison can do it in English. Then again he may have already written that article 30 years ago and I missed it. Alexsei is right, the purpose of a wing is to divert air downward to generate lift as a counter reaction. All that Bernoulli stuff is in the "lies my teacher told me" category like "dinosaurs are extinct," "the sun is an average star" and "before 1492 people thought the world was flat." Dynamical soaring is possible because of active flight surfaces in combination with the deviations of the lift, drag and thrust not being symmetric under opposite velocity vector perturbation. (Told you I couldn't do the English.) Any pilot would kill for the thousands of flight controls on every surface of their aircraft that allow kestrels and albatross to seem magical.

Aleksei Besogonov

The percentage of lift attributed to Bernoulli's principle is around 5%. For Bernoulli's principle to have sufficient effect, the working fluid needs to be confined, which obviously doesn't happen on an aircraft. Thicker wing profile reduces vortexes that happen when there's a sharp discontinuity in the flow. So you can't really use razor-sharp wings. Gliders still use pretty slim wings, though.

Limeware Platter

while a majority of the lift is caused by the angle of attack and the deflection of the air, up to 25% of the lift is still caused by the camber and bernoulli's principle. I'd invite you to go look at the camber on a glider compared to a powered aircraft, if bernoulli's principle didn't matter why take on all that drag from a thicker wing? also, the air above the wing would be hopelessly turbulent and nothing would fly without the principle

Grace and Frankie

oh were it even that simple https://pilotinstitute.com/the-curious-story-of-airplane-lift/

HissyFit! Pet Therapy and Rescue

Thank you!!!!!

Clint's Reptiles

Best way to follow up is by emailing clintsreptileroom@gmail.com. Thanks!

HissyFit! Pet Therapy and Rescue

Hi Jason! I would like to confirm that my application for your second Grand Opening was received, and I’m not sure how to go about doing that. Mind letting me know whom I should contact and how please? Thank you! ~Kimber with HissyFit!

Aleksei Besogonov

Uhm. I have terrible news for you. Bernoulli's principle has nothing to do with the lift. Instead, you simply have good old Newton's laws. The angled airfoil redirects some air downwards, and the opposite force to that is lift. The amount of deflected air depends on the speed of the air and the geometry of the wing. And that's all there is to it. A purely passive glider can't stay static in a headwind forever, it'll eventually stall and crash. But with dynamic soaring, you can trade altitude for kinetic energy (by reducing the angle of attack, which also reduces the aerodynamic drag), and then you can _gain_ altitude rapidly by increasing the angle of attack. Crucially, the only counteracting force during the climb is the aerodynamic drag. The angle of attack changes can be done just by shifting the center of gravity relative to the wing surface. Humans can almost replicate the feat of birds in modern gliders, but it requires wind speeds that are generally too dangerous for flying gliders.

Mary A. Phillips

Maybe at the beginning of the conversation about the northern and southern, the picture is wrong. It looked that way to me.

Grace and Frankie

I'm only writing this because: A. We're among friends here in the Patreon comments B. I know you're wonderfully committed to accuracy C. The real internet will be exhaustingly annoying about this in the YouTube comments section, but... that different distance, faster speed, unequal pressure explanation for lift is widely cited but unfortunately inaccurate, which is why for example planes can fly upside down: https://pilotinstitute.com/the-curious-story-of-airplane-lift/

Doug Smith

Oooooh! I'll go! Pick me! 😁

Katie Meyer

I hadn't made it to the zoo in about a month, dealing with some life things, And I had heard/knew they were planning to update the Humboldt Penguin, I must have seen one of the days just before the closure. At least the signage indicated the new enclosure would be done by winter 2024. After passing through the main entrance building, they are the first animals one sees. And when you are probably the only member left in the zoo, the penguins engage in zoomy behavior akin to flying rays and dolphins jumping out of the water, down, up, and down. Yeah. Penguins are awesome.

Clint's Reptiles

Good catch, but in this instance it happened to be intentional.

Clint's Reptiles

Good catch. It should have scrolled automatically, but has had issues lately.

Clint's Reptiles

Good catch. It should have scrolled automatically, but has had issues lately.

Doug Smith

The Patreon list is frozen on one page.

Clare K

Not sure if this counts as a mistake, but I don't think you said the name of the clade itself (procellariimorphae) anywhere in this cladistics video lol

Alirynn

I take it back because I just saw the teaser and then fangirled and commented! I'm glad you mentioned some of the awesomest facts about penguins like they fly under water, have dinosaur feet, and are so fast and cool! I eagerly await the full dive (like an emperor penguin!) into the penguin family!