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The Hindenburg disaster is frequently cited as an example of the safety risks posed by hydrogen. The extremely high cost of helium (compared to hydrogen) has led researchers to re-investigate the safety issues of using hydrogen as a lift gas, especially for vehicles not carrying passengers and being deployed away from populated areas.
Lifting gas is generally hydrogen, helium or hot air. Hydrogen gives the highest lift 1.1 kg/m 3 (0.069 lb/cu ft) and is inexpensive and easily obtained, but is highly flammable and can detonate if mixed with air. Helium is completely non flammable, but gives lower performance-1.02 kg/m 3 (0.064 lb/cu ft) and is a rare element [33] and much ...
Using the molar volume, the mass of 1 liter of helium (at 1 atmospheres of pressure) is found to be 0.178 g. If helium is used instead of vacuum, the lifting power of every litre is reduced by 0.178 g, so the effective lift is reduced by 13.90625%. A 1-litre volume of hydrogen has a mass of 0.090 g, reducing the effective lift by 7.03125%.
Hydrogen also increased lift by about 8%. After the Hindenburg disaster Eckener vowed to never use hydrogen again in a passenger airship. He planned to use helium for the second ship and went to Washington, D.C. , to personally lobby President Roosevelt , who promised to supply the helium only for peaceful purposes.
Hydrogen, nitrogen, oxygen and chlorine are cheapest by volume at atmospheric pressure. When there is no public data on the element in its pure form, price of a compound is used, per mass of element contained. This implicitly puts the value of compounds' other constituents, and the cost of extraction of the element, at zero.
Which of these struggling hydrogen-driven companies is a better buy right now? Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Sign in ...
Here's what the average ticket cost for the five preceding Super Bowls, per SeatGeek: Super Bowl 58: $12,128 (Allegiant Stadium, Las Vegas — San Francisco 49ers vs. Kansas City Chiefs).
The disaster of the British airship R 101 prompted the Zeppelin Company to reconsider the use of hydrogen, therefore scrapping the LZ 128 in favour of a new airship designed for helium, the LZ 129. Initial plans projected the LZ 129 to have a length of 248 metres (814 ft), but 11 m (36 ft) was dropped from the tail in order to allow the ship to ...