Editing Jet pack (section)

==Hydroflight==
[[File:Jetlev Jetpack.jpg|thumb|right|[[Jetlev]] water powered jet pack]]
[[File:Flyboard Lesson - Merritt Island FL (2).jpg|thumb|upright|A [[Flyboard]] with its distinctive configuration of having the nozzles located below the pilot's feet]]
The 21st century has seen a new approach to jet packs where water is used as a high-density propulsion fluid. This requires a very large mass of fluid that makes a self-contained jet pack infeasible. Instead, this approach separates the engine, fuel and fluid supply from the pilot's flying apparatus, using a long flexible hose to feed the water to the jet nozzle pack attached to the pilot's body. These inventions are known as "hydro jet packs", and successful designs have used jetski technology as the powerplant operating in a body of water (an ocean, lake, or pool) to provide the needed propulsion. Several hydro jet pack approaches have been successfully tested and put into production. Flow rate can be controlled by a throttle operator on the jetski, or by the pilot using a remote actuator.

Hydro jet packs can be operated below the water's surface as well as above it. As of 2013, many hydro jet pack rental businesses are operating in various locations around the world.

===JetLev===
{{main|JetLev}}
The [[JetLev]] was the first hydroflight jet pack on the market, and its makers were awarded the first patents, in 2008, for hydro jet packs. The JetLev has the appearance of a typical jet pack, with two nozzles on a backpack propelling the rider upwards. It has an umbilicus to the powering jetski that provides the water for the thrust used.<ref name=Amex-2013-05-23>{{cite web |url= https://www.americanexpress.com/us/small-business/openforum/articles/raymond-li-of-jetlev-how-james-bond-inspired-him-to-invent-a-jet-pack/ |title= Raymond Li of Jetlev: How James Bond Inspired Him to Invent a Jet Pack |author= Katie Morell |date= 23 May 2013 |publisher= American Express }}</ref><ref name=Marketwired-2016-08-17>{{cite news |url= http://www.marketwired.com/press-release/zapata-industries-announces-acquisition-consolidation-hydro-flight-intellectual-property-otcqb-imsc-2151509.htm |title= Zapata Industries Announces the Acquisition and Consolidation of Hydro-Flight Intellectual Property Rights in the US and Abroad |publisher= Marketwired |date= 17 August 2016 }}</ref><ref name=H2RO-2016-09-14>{{cite magazine |url= http://www.h2romagazine.com/h2ro-news/hydrofight |title= {{sic|Hydrofight|nolink=y}} Sports |author= Blaine Jeffery |date= 14 September 2016 |magazine= H2RO Magazine |access-date= 23 May 2018 |archive-date= 24 May 2018 |archive-url= https://web.archive.org/web/20180524081923/http://www.h2romagazine.com/h2ro-news/hydrofight |url-status= dead }}</ref>

===Flyboard===
{{Main|Flyboard}}
A [[Flyboard]] has water jets under each of the pilot's feet. An optional feature is a lower-thrust water jet for each arm for greater control. The powerplant is a regular [[jetski]]. Development for this approach was started in the spring of 2011.<ref>{{cite web|url=http://www.zapata-racing.com/en/flyboard/historique/ |title=HISTORY &#124; &#124; Zapata RacingZapata Racing |access-date=2013-08-14 |url-status=dead |archive-url=https://web.archive.org/web/20130806054354/http://www.zapata-racing.com/en/flyboard/historique/ |archive-date=2013-08-06 }}</ref>

===Firefighters===

Firefighters in some parts of the world use jet packs which help them to fight fires close to the sea or a water body. The jet packs use water and there is no need for a fire truck or water tank.<ref>Archived at [https://ghostarchive.org/varchive/youtube/20211205/n_5oaGqrQlo Ghostarchive]{{cbignore}} and the [https://web.archive.org/web/20171003155957/https://www.youtube.com/watch?v=n_5oaGqrQlo Wayback Machine]{{cbignore}}: {{cite web| url = https://www.youtube.com/watch?v=n_5oaGqrQlo| title = Dubai firefighters launch water jetpack | website=[[YouTube]]| date = 23 January 2017 }}{{cbignore}}</ref>