AAAAAA

/30/ i dont know i'm just kinda here

[dontswallow]

[cameracat]

Happy spring!

[koto-san-96]

[sacred-portal]

[inwardhardar]

[silvaurum]

basketball dracula isn't real dude he can't-- *sudden squeaking noises from the shadows*

[silvaurum]

*two pool toys having sex tumble by in the wind* oh thank god

[silvaurum]

*thunderous slam dunk noise*

[fallout-lou-begas]

Visit Original Link

[snoleopard7]

[swagophile]

[sforzzz]

it's totally ok to dislike things. right?

[sforzzz]

i have to go delete some posts

[catalystcomet-archive-deactivat]

hello this is my favorite video ever please please

[catalystcomet-archive-deactivat]

el muchacho monday

[fattcactus]

In her spaceship

[catchyvideos]

OP mingbi on TikTok

[yanguang]

不会又是puyi tuesday了吧

[julia-miraclerat]

Can you believe it! Torn apart by dogs again!

[o-fantasma]

dont believe in metaphor. things are literally other things

[gokusclit]

Always the worst bitch you’ve ever known talking abt how they’re a deer or a puppy or whatever online

[enriquemzn262]

Main rotor hub, transmission and engine of the American UH-60 Black Hawk helicopter.

[rotorsexual]

An interesting part of the UH-60's rotor head is the '+' shaped device attached above and oriented 45° offset from the rotor blades.

Its called a Bifilar damper and its job is to reduce the vibrations from the main rotor before they are transferred into the transmission and airframe.

Weights are attached at each end and held on by a pair of thick bolts. These weights have a large cutout around each bolt that secures them and are free to move around quite a bit. As the rotors turn, centrifugal force holds them out rigid and any vibrations or resonance in the blades as they flap, feather, and lead/lag, will be resisted by the weights moving opposite. The system is totally passive and apparently has a noticeable effect in making the UH-60 fly smoother at the cost of another small inspection and maintenance item.

[enriquemzn262]

Hoho, I always wondered what those were, thanks for the info!

Another interesting design feature of the Black Hawk is the tilted tail rotor, which counters the nose-up tendency of the airframe, allowing for much better control and clear visuals while hovering.

[rotorsexual]

No problem I love to share that kind of obscure info. And maybe one more fun fact while we're on the topic of the tail rotor.

The UH-60 has an aft center of gravity to allow a range for loading and unloading the cabin. So Sikorsky canted the tail rotor 20° to lift the tail and correct the hover attitude in an aft CG.

But because the tail rotor provides lift now, as the pedals are pushed to change the tail rotor thrust and yaw the helicopter the nose will pitch up and down as well. So the UH-60 has a mixing unit in the controls that is governed by the AFCS (Automatic Flight Control System) which automatically applies a bit of fore and aft cyclic input to keep the nose level during a pedal turn.

The stabilizer on the tail also contributes. Because the UH-60 required such a large one, it was converted to a moving stabilator to aid with pitch control in forward flight.

At a hover and low speeds the stabilator has a high angle of incidence to be more in line with the downwash of the main rotor. And then as the helicopter adds power and airspeed the AFCS changes the stabilator angle to help maintain a level flight attitude. Without this then the stabilizer would cause a significant nose up tendency any time the helicopter tried to accelerate from a hover.

[coughloop]

[rainie-is-seasonchange]

Wisteria garden.

Shizuoka, Japan.