i’ve said it before and i’ll say it again
YOU DO NOT NEED TO BRING YOUR GUN TO THE GROCERY STORE
how does america even function like it sounds like a video game or something. grand theft freedom.
attention passengers this is your pilot speaking, we’re going to be experiencing some heavy turbulence shortly so please strap in. this loser just bet that i couldn’t do a 360 barrel roll in this thing and let’s just say i’m about to be $20 richer real soon
The hummingbird has long been admired for its ability to hover in flight. The key to this behavior is the bird’s capability to produce lift on both its downstroke and its upstroke. The animation above shows a simulation of hovering hummingbird. The kinematics of the bird’s flapping—the figure-8 motion and the twist of the wings through each cycle—are based on high-speed video of actual hummingbirds. These data were then used to construct a digital model of a hummingbird, about which scientists simulated airflow. About 70% of the lift each cycle is generated by the downstroke, much of it coming from the leading-edge vortex that develops on the wing. The remainder of the lift is creating during the upstroke as the bird pulls its wings back. During this part of the cycle, the flexible hummingbird twists its wings to a very high angle of attack, which is necessary to generate and maintain a leading-edge vortex on the upstroke. The full-scale animation is here. (Image credit: J. Song et al.; via Wired; submitted by averagegrdy)