Editing Zeppelin NT (section)

===Hull and structure===
The Zeppelin NT is a ''semi-rigid'' airship. It is unlike both the original Zeppelins that had a rigid skeleton and non-rigid blimps. It has an internal triangular [[truss]] made of [[graphite-reinforced plastic]] and three longitudinal girders made of welded [[aluminium]] which connect the triangular elements along the length of the frame.<ref>Sträter 2012, pp. 559–561.</ref> Additionally, the structure is tightened with [[aramid]] cords to provide for extra rigidity. All major components, such as the engines, control cabin and the steering fins, are mounted upon the structure; this allows maneuverability to be maintained even in the event of envelope pressure being lost. The whole structure weighs only about {{convert|1000|kg|lb}}.<ref name = "Sträter 548">Sträter 2012, p. 548.</ref><ref name = "tech"/>

The envelope contains the lighter-than-air helium which gives the airship its buoyancy. Inside historical Zeppelins, the gas cells were separate entities from the hull; however, on the Zeppelin NT, the envelope serves both as the aircraft's hull and as the gas cell. It is made of a three-layered [[laminate]]: one gas-tight layer of [[Polyvinyl fluoride|Tedlar]] (PVF), one [[polyester]] fabric layer to provide stability and one [[polyurethane]] layer suitable for [[plastic welding]] that acts to connect the separate laminate panels. To preserve its outer form, a slight overpressure of about {{convert|5|mb|psi}} is maintained within the hull. As in [[blimp]]s, the interior pressure is kept constant at all flight altitudes by using [[ballonet]]s. The ballonets have a total volume of {{convert|2000|m3|cuft}}.<ref name = "tech"/><ref>[http://www.aerospacemanufacturinganddesign.com/article/amd1213-goodyear-iconic-airship/ "Goodyear Blimp NT Takes Shape."] ''Aerospace Manufacturing and Design'', 12 December 2013.</ref>

On the external surfaces of the Zeppelin NT are several equipment attachment points, including multiple [[hardpoint]]s present for the purpose of installing cameras of up to 65&nbsp;kg weight; an optional nose-mounted boom can be installed for attaching sensor equipment or scientific probes. Payloads can also be suspended underneath the airship via a [[cargo hook (helicopter)|cargo hook]] arrangement using the floor hatch present in the cabin.<ref name = "Sträter 556">Sträter 2012, p. 556.</ref> Due to the [[center of gravity]] and the location of the cabin being different, two sets of non-retractable [[landing gear]] are installed on the underside of the airship, the forward set being directly attached to the cabin's underside and the aft set upon the primary structure itself.<ref name = "Sträter 565-566">Sträter 2012, pp. 565–566.</ref>