Rocket engines operate at temperatures that exceed the melting point of every metal they're made from. And they do it every launch. The solution on engines like SpaceX's Raptor: run the cold fuel through channels inside the nozzle wall before combustion. The metal stays cool. The fuel absorbs the h

Rocket engines operate at temperatures that exceed the melting point of every metal they're made from. And they do it every launch. The solution on engines like SpaceX's Raptor: run the cold fuel through channels inside the nozzle wall before combustion. The metal stays cool. The fuel absorbs the h

Rocket engines operate at temperatures that exceed the melting point of every metal they're made from. And they do it every launch. The solution on engines like SpaceX's Raptor: run the cold fuel through channels inside the nozzle wall before combustion. The metal stays cool. The fuel absorbs the h

Rocket engines operate at temperatures that exceed the melting point of every metal they're made from. And they do it every launch. The solution on engines like SpaceX's Raptor: run the cold fuel through channels inside the nozzle wall before combustion. The metal stays cool. The fuel absorbs the h

Rocket engines operate at temperatures that exceed the melting point of every metal they're made from. And they do it every launch. The solution on engines like SpaceX's Raptor: run the cold fuel through channels inside the nozzle wall before combustion. The metal stays cool. The fuel absorbs the h