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Hydrogen and helium are the most commonly used lift gases. Although helium is twice as heavy as (diatomic) hydrogen, they are both significantly lighter than air. Thus helium is almost twice as dense as hydrogen. The lifting power in air of hydrogen and helium can be calculated using the theory of buoyancy.
Helikites are used by telecoms companies to lift 4G and 5G base stations for areas without cellphone coverage. Helikites range in size from 1 metre (gas volume 0.13 m 3) with a pure helium lift of 30g, up to 14 metres (gas volume 250m 3) able to lift 117 kg. Small Helikites can fly up to altitudes of 1,000 ft, and medium-sized Helikites up to ...
The hull is internally divided by diaphragms into a total of six main compartments with additional sub-divisions; these divisions can be sealed in the event of emergencies, such as battle damage being sustained, allowing for the majority of the airship's helium, and thereby lift capacity, to be retained. [20]
The hybrid airship combines the airship's aerostatic lift, from a lighter-than-air gas such as helium, with the heavier-than-air craft's dynamic lift from movement through the air. Such a hybrid craft is still heavier than air, which makes it similar in some ways to a conventional aircraft.
LZ 129 Hindenburg (Luftschiff Zeppelin #129; Registration: D-LZ 129) was a German commercial passenger-carrying rigid airship, the lead ship of its class, the longest class of flying machine and the largest airship by envelope volume. [3]
In early dirigibles, the lifting gas used was hydrogen, due to its high lifting capacity and ready availability, but the inherent flammability led to several fatal accidents that rendered hydrogen airships obsolete. The alternative lifting gas, helium gas is not flammable, but is rare and
The P-791 was modified to be a civil cargo aircraft under the name SkyTug, with a lift capability of 20 short tons (18,000 kg) and plans to scale larger. [4] In March 2016, Straightline Aviation signed a Letter of intent for 12 LMH1 airships, valued at $480 million. [5]
Cargolifter AG was founded by a group of influential engineers and scientists in 1996, and its main goal was to promote airships and develop technologies for their use as a lifting mechanism for transporting heavy and bulky goods to hard-to-reach places.