Have you ever fantasized about walking on the moon, but you don't want to put on a spacesuit and blast more than 200,000 miles through space? A New York-based startup plans to turn this lunar fantasy into a reality, and it could be as simple as putting on a pair of magnetic loafers.
Moonshine Crea, the company developing the out-of-this-world footwear, is strategically inserting superpowerful magnets at the base of its shoes to create a force field, leaving wearers light on their feet.
The shoe, named "20:16 MoonWalker," relies on N45 neodymium magnets, which are among the most powerful permanent magnets known. As permanent magnets, they create their own force field, without an external current, and work like refrigerator magnets.
"There are different levels of magnets, like N40, 42 and 45," said Patrick Jreijiri, a mechanical engineer and designer for the 20:16 MoonWalker. The neodymium magnets' strength level depends on their exact composition, which is primarily a mix of neodymium, iron and boron.
"N45 is stronger than the rest and still on the cheap side," Jreijiri told Live Science, which is why it was chosen. There are around 12 to 13 magnets on one layer that repel a mirror image of 12 to 13 magnets on another layer in each shoe. The repellant force comes from the orientation of the magnets, which are arranged so that their north poles align with each other.
The magnets range from 1 to 2 inches (2.5 to 5 centimeters) in diameter. The 2-inch magnets are strong enough to move 27 lbs. (12 kilograms) of material, and the 1-inch magnets are capable of moving objects up to 55 lbs. (12 kg), Jreijiri said.
The magnets and resulting repulsion cover the entire area of the foot, so when a person is walking, he or she is pushing against the combined strength of the magnets, Jreijiri said.
"As you're walking, your foot will exert pressure on the magnets unequally," he said. To remedy that, the bigger magnets are directly under the heel and ball of the foot to counteract the extra force placed on these parts when people walk. Furthermore, the space between the magnets creates a sort of cushion and adjusts to how a person walks, he said.
The gap also means that an individual's weight won't be a factor in the sensation he or she will feel while wearing the MoonWalker shoes, Jreijiri said, as long as the wearer is less than 403 lbs. (183 kg), at which point the magnets would collapse.