AERONAUTICS: Cheaper Protection

Helium is non-inflammable and lessens the risk of airship operation. But it costs $100 per 1,000 cubic feet and—in spite of the goldbeater's skin covering the cotton bags—it leaks out to the tune of several hundred dollars a day. The British Air Secretary now announces a different scheme, whereby cheap hydrogen will be surrounded with a shell of inert gas, minimizing fire risk at a tenth of the cost of helium.


Want the full story?

Subscribe Now


Learn more about the benefits of being a TIME subscriber

If you are already a subscriber sign up — registration is free!