Editing Zeppelin NT (section)

===Overview===
[[File:2003-07-26 16-49-36 Germany Baden-Württemberg Unterailingen.JPG|thumb|Zeppelin NT ''D-LZZR'' at the airport in Friedrichshafen, 2003]]
The Zeppelin NT series are a family of ''semi-rigid'' [[airship]]s, combining the design principles of rigid airships and [[blimp]]s together.<ref name = "Sträter 547">Sträter 2012, p. 547.</ref> The Zeppelin N07, the base model and most commonly constructed to date, are {{convert|75|m|ft}} long, with a volume of {{convert|8225|m3|cuft}}.<ref name="nt">{{Cite web|last=Zeppelin Luftschifftechnik GmbH |year=2008 |url=http://www.zeppelin-nt.de/pages/E/luftsch_u_zepp.htm |title=Das Luftschiff |url-status=dead |archive-url=https://web.archive.org/web/20070510001107/http://www.zeppelin-nt.de/pages/E/luftsch_u_zepp.htm |archive-date=10 May 2007 }}</ref><ref name = "Sträter 548"/> They are thus considerably smaller than the old Zeppelins, which reached a maximum volume of {{convert|200000|m3|cuft|abbr=on}}, such as the [[LZ 129 Hindenburg|LZ 129 ''Hindenburg'']]. Furthermore, they are inflated exclusively with the non-flammable [[noble gas]] [[helium]], rather than with [[hydrogen]].<ref name = "cnn 2014"/><ref name = "tech">[http://zeppelin-nt.de/en/zeppelin-NT/technology.html "Technology: Highest level of comfort, with maximum safety."] ''Zeppelin NT'', Retrieved: 7 July 2016.</ref>

The Zeppelin NT, designed more than 60 years after the last generation of Zeppelins were built and making use of advances in [[material science]] and [[computer-aided design]], is claimed to overcome some of the typical maneuverability, safety, and economic disadvantages of airships.<ref name = "Sträter 547"/> In particular, the propulsion system offers significantly increased safety.<ref name = "Sträter 547"/> In standard operations with a maximum payload, the [[lifting gas]] cells do not create enough [[buoyancy]] to make the whole ship lighter than air. The negative buoyancy is overcome with the application of engine power. The buoyancy can change when traveling with a reduced payload and partially emptied fuel tanks, but typically the Zeppelin NT starts a journey with a net downward force of about {{convert|3000|N|lbf}}; on long trips, the airship can become lighter–than–air if much of its fuel is consumed.

The design typically has a range of some {{convert|900|km|mi}} and reaches top speeds of {{convert|125|km/h|mph}}. The standard cruising speed of {{convert|70|km/h|mph|abbr=on}} for tourist flights can be attained using the rear propeller only. Standard operational altitude is {{convert|300|m|ft|abbr=on}}, but up to {{convert|2600|m|ft|abbr=on}} is possible. Their maximum permitted takeoff weight is {{convert|10960|kg|lb}}, with a payload of {{convert|1900|kg|lb|abbr=on}}. A long endurance system can also be installed for extended range and longer flight times.<ref name = "off hist"/>