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March 30, 2020

How to fold the perfect paper plane

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You've got plenty of time to practice.

From Kathryn Nave's piece in Wired UK:

On February 26, 2012 at California's McClellan Air Force Base, TV producer John Collins smashed the record for the longest paper-plane flight.

Here's how to build a rival to his  227-foot record.

How it works

The key is the dihedral angle, where the wings leave the plane's body.

"Tilted-up wings increase stability," Collins explains,"but add drag."

You want no dihedral at launch, when speed reduces the need for stability, and an upwards angle as the plane loses speed.

As the plane slows, the air adheres further back along the wings.

"I put a flat dihedral at the nose, then raked it up further back," Collins says. "The plane has no dihedral at first, but this increases as it reduces speed."

Guinness World Record rules allow one 25mm x 30mm piece of Scotch tape: cut it into pieces and use sparingly.

First folds

"Take the top-right corner of the page and fold the top edge to the left side. Unfold and repeat for the left corner for an X crease," Collins says.

These will be the wings' leading edges.

"Use a credit card to make the creases sharp."

Take the top right corner of the page and fold down to line the side up with the diagonal crease.

Repeat on the left.

"Leave 1.5mm between the edge of the page and the crease."

Fix the wings

To make the wings, start a crease close to the nose.

"Don't line up the front of the wing with the bottom of the fuselage," Collins says. "Pull it down so that the raw edge towards the back of the wing — not the wing itself — touches the corner at the back of the fuselage. That gives more wing and less fuselage."

You should see an increased dihedral angle towards the rear — emphasize this while keeping it flat at the front.

Add fuselage

Fold the pointed top of the page straight down from the point where the original diagonals cross.

"The crease lines across the top of the folded-down layer should line up with the folded-in edges of the paper beneath," Collins says.

Fold in the top sides of the paper along these edge and crease lines — the two flaps should meet exactly in the middle.

Fold the whole plane in half down this central line.

Throw smarter

Success is more about technique than force, says Collins.

"Start off gentle and keep adding velocity until you get the speed you want."

Adjust the plane after each flight, to fine-tune performance.

"If your plane is turning left, bend the back of the plane to the right and vice versa. To get it to go up more, bend up the back of the plane. You'd be amazed how much difference a tiny adjustment makes."

March 30, 2020 at 04:01 PM | Permalink | Comments (0)

Clouds

March 30, 2020 at 02:01 PM | Permalink | Comments (0)

The Rings of Earth — Kim Warp

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March 30, 2020 at 12:01 PM | Permalink | Comments (0)

BehindTheMedspeak: Actually, there's no ventilator shortage

Long story short: a ventilator is simply a mechanical device for inflating the lungs via an endotracheal tube.

A person can do it just as well, trust me on this: I did it for 38 years in operating rooms, x-ray and CT suites, outpatient clinics, doctor's offices, and Code Blues.

Remember early computers?

They were women, not machines: 

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Anyone who can make a fist can squeeze a ventilator bag 10 times/minute. 

That's the exact equivalent of a ventilator, but even better: if the person being ventilated can still breathe on their own to any extent, you can assist them by squeezing the bag, whereas a ventilator starts alarming.

March 30, 2020 at 10:01 AM | Permalink | Comments (4)

Misfortune Cookies

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From websites:

A new, dark take on fortune cookies.

These black cookies match the pitch black humor of the "misfortunes" inside.

Individually packed to ensure the darkness inside can't escape.

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Beware: these cookies bite back.

Each multipack is boxed to protect against crushing, unlike the soul crushing fortunes found inside.

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Three cookies for $9.99.

March 30, 2020 at 08:01 AM | Permalink | Comments (0)

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