they shouldn't be flying very far, and thus won't even make it to 40k feet before heading down. If you are going more than 500 miles (i made that up but it is a

they shouldn't be flying very far, and thus won't even make it to 40k feet before heading down. If you are going more than 500 miles (i made that up but it is a good number to start with) build a new factory. Iowa has kept one factory busy for more than a decade transporting less distance than that.