“When the sealant works as designed, most drivers never know it’s working. There is no pressure loss, and odds are the driver doesn’t see the object in the tire or it’s fallen out,” Rogers said.
Creating the rubbery sealant was tricky, Michelin engineers said. It must flow into punctures, but it can’t pool at the bottom of the tire when it’s parked. The material also must form an airtight seal, and flow at temperatures from scorching desert blacktop to a frigid winter night.
Michelin’s tires can theoretically keep going for days, though they will eventually need to be repaired or replaced, depending on how severely the puncture damaged the tire.
As Scotty notes in his video, the self-sealing idea goes back at least as far as WWII (he shows a picture of a self-sealing gas tank). Technovelgy readers know that Golden Age great Raymond Z. Gallun makes great use of self-sealing plastic for asteroid-based greenhouses in his 1951 classic Asteroid of Fear.
At that loud reverberation, the Venusian turned pasty-yellow...
"That was an alarming sound," Drake admitted patiently. "But the particle that made it was smaller than the head of a pin. It struck three inches of good steel. We have a layer of lead, to absorb the gamma ray, and a seal of compressed plastifoam to save the air if one comes through."
Scroll down for more stories in the same category. (Story submitted 7/7/2019)
Space Traffic Management (STM) Needed Now
'...the spot was a lonely one in an uncharted region, far from the normal lanes of space traffic.' - Arthur William Bernal (1935)
Capturing Asteroids With Nets
'...the meteor caught and halted just as a small boy catches a swift ball in his cap.' V.E. Thiessen, 1947.
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'Pina2bo would have to operate full blast for many years to put as much SO2 into the stratosphere as its namesake had done in a few minutes.'