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A backpack helicopter is a helicopter motor and rotor and controls assembly that can be strapped to a person's back, so that he can walk about on the ground wearing it, and can use it to fly. Its harness, like a parachute harness, should have a strap between the legs, so that the pilot does not fall out of the harness during flight. Some designs may use ducted fan design to increase upward thrust. Several inventors have tried to make backpack helicopters, with mixed results.
Typically a backpack helicopter differs from a conventional helicopter in two ways. Firstly there is no tail rotor, and the main rotors are contra-rotating. Yaw is controlled by fine adjustment of a differential gear in the rotor drive transmission. When one rotor is adjusted to spin slightly faster than the other it induces yaw, or turning motion. Secondly, the rotors are fixed pitch, which assists with simplicity, however this means that in the event of engine failure autorotation is impossible. Usually a Ballistic parachute would be incorporated for safety.
A Popular Science magazine in 1969 featured a backpack helicopter that used small jet engines on the tips of the rotors instead of contra-rotating rotors. This design could function in autorotation. Related are devices like a backpack helicopter which also include a seat and leg supports and are actually very small open-topped ordinary helicopters. In theory, a helicopter would be more efficient than a rocket/jet pack, possessing a greater specific impulse, and being more suited to hovering due to the smaller velocities of the propelled gases.
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Examples [link]
Pure backpacks [link]
- The Heliofly was a make which was designed in Germany in 1941 onwards.[1][2]
- The Pentecost Hoppicopter was developed by an independent inventor and demonstrated to the military in 1945.
- Rhyme (made in Japan)
- Libelula (dragonfly) from Tecnologia Aeroespacial Mexicana (TAM) with a 2-bladed rotor driven by a small rocket motor at the end of each rotor blade. Info. (They also make a jetpack.)
- The NASA Puffin is another VTOL strap-on helicopter, which like the AeroVironment SkyTote can also transition to horizontal flight [3]
With a seat [link]
- SoloTrek XFV (Exo-skeletal Flying Vehicle).
- Martin Jetpack
- Vortech designed various models which have seats.[4] They formerly also made a pure backpack model with two very long rotor blades driven by a little propane-powered jet motor at the end of each blade.
- GenH4[5]
- The Aerospace Corporation's Springtail [6]
In popular culture [link]
Backpack helicopters are relatively popular gadget in fiction. The SoloTrek XFV has appeared in spy films such as the 2003 film Agent Cody Banks.
In real life, backpack helicopters are flown with the pilot's body vertical, but some appear in fiction (for example, in Dan Dare comics) which are flown with the pilot's body horizontal.
Several action figures came equipped with backpack helicopters. Such an accessory was released as part of the G.I. Joe toyline for any figure to use. The Annihilator figure had a helicopter back-pack as part of its accessories. Another vertical example is the Turbo-Copter unit for the popular Action Man toy figure.
- The 1984 Commodore 64 game H.E.R.O. (Helicopter Emergency Rescue Operation) featured a protagonist who wore a helicopter backpack
- The game Super Monkey Ball Deluxe shows Dr. Bad-Boon using a backpack helicopter
- In the 2009 game Scribblenauts a backpack helicopter can be summoned using the phrase "helibackpack".[7]
- In the 1973 Woody Allen film "Sleeper" Allen's character Miles Monroe tries to escape from the government's security police while using a largely ineffective backpack helicopter. He could not rise more than a few feet off the ground and only for several seconds, despite much arm-flapping.
- Rotor, a villain from the 2010 LEGO Hero Factory toyline, has a helicopter pack that he uses as a weapon and a flight mechanism.
- A backpack helicopter is featured in the Ratchet and Clank series.
- Karlsson-on-the-Roof from books of Astrid Lindgren has something similar to a backpack helicopter on his back.
- Inspector Gadget also had a helicopter, though not in a backpack and was deployed from the top of his hat.
See also [link]
References [link]
- ^ "Heliofly". Geocities.com. Archived from the original on 2009-10-22. https://web.archive.org/web/20091022171438/https://geocities.com/unicraftmodels/germ/heliofly/heliofly.htm. Retrieved 2009-07-26.
- ^ "Baumgartl Heliofly I helicopter - development history, photos, technical data". Avia.russian.ee. https://avia.russian.ee/helicopters_eng/baumgartl_heliofly-1-r.html. Retrieved 2009-07-26.
- ^ NASA Puffin
- ^ "Aircraft and Jet books and videos". Vortechonline.com. https://www.vortechonline.com. Retrieved 2009-07-26.
- ^ [1][dead link]
- ^ MyFreeTemplates.com (2003-11-05). "PAV Springtail EFV". Trekaero.com. https://www.trekaero.com/Trek_VTOL_Springtail_Vehicles.htm. Retrieved 2009-07-26.
- ^ Posted by Joshua (2004-02-29). "Scribblenautics: Tons of new videos and a new trailer...Part 1". Scribblenautics.blogspot.com. https://scribblenautics.blogspot.com/2009/07/tons-of-new-videos-and-new-trailerpart_26.html. Retrieved 2009-07-26.
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https://wn.com/Backpack_helicopter
Heli
Heli, also heli, heli- may refer to:
People
Places
Companies
Other uses
A prefix of a word
heli- indicating a reference to helicopters; examples may or may not be hyphenated according to local or popular usage:
Heli (name)
Heli is a Finnish female given name. Its nameday is the 20th of February. It might have originated as a variation of the name Helena, although it is not certain.
It reached the peak of its popularity in the middle of the 20th century. As of December 2012, there are more than 17,000 people registered in Finland with this name.
The name also exists in Estonia.
Notable people
References
Heli (film)
Heli is a 2013 independent Mexican crime drama film directed by Amat Escalante and produced by Jaime Romandía. Featuring newcomers Armando Espitia, Andrea Vergara, Linda González, and Juan Eduardo Palacios, the film premiered in competition for the Palme d'Or at the 2013 Cannes Film Festival. Escalante won the Best Director award at the ceremony. While being appreciative of the film's technical aspects, film critics were divided in their opinion of the film itself. Heli was selected to represent Mexico at the 86th Academy Awards for Best Foreign Language Film, but it was not nominated.
Plot
Heli tells the story of the titular protagonist (played by Armando Espitia), a seventeen-year-old boy living with his wife (Linda González) and his sister, Estela (played by Andrea Vergara). The film follows the arcs of these characters and Estela's boyfriend (played by Juan Eduardo Palacios) as they struggle with drugs, violence, and corruption.
Heli is a young man working in a car assembly factory; he lives with his father who also works there, his wife Sabrina, his baby son Santiago and his sister Estela. His life is normal, slow, and without economical prospects, and he suffers from a troubled relationship with his wife.
Pack
Pack or packs may refer to:
Places
People
Air cycle machine
An air cycle machine (ACM) is the refrigeration unit of the environmental control system (ECS) used in pressurized gas turbine-powered aircraft. Normally an aircraft has two or three of these ACM. Each ACM and its components are often referred as an air conditioning pack. The air cycle cooling process uses air instead of a phase changing material such as Freon in the gas cycle. No condensation or evaporation of a refrigerant is involved, and the cooled air output from the process is used directly for cabin ventilation or for cooling electronic equipment.
History
Air cycle machines were first developed in the 19th century for providing chilling on ships. The technique is a reverse Brayton cycle (the thermodynamic cycle of a gas turbine engine) and is also known as a Bell Coleman cycle or "Air-Standard Refrigeration Cycle".
Technical details
The usual compression, cooling and expansion seen in any refrigeration cycle is accomplished in the ACM by a centrifugal compressor, two air-to-air heat exchangers and an expansion turbine.
Playing card
A playing card is a piece of specially prepared heavy paper, thin cardboard, plastic-coated paper, cotton-paper blend, or thin plastic, marked with distinguishing motifs and used as one of a set for playing card games. Playing cards are typically palm-sized for convenient handling.
A complete set of cards is called a pack (UK English), deck (US English), or set (Universal), and the subset of cards held at one time by a player during a game is commonly called a hand. A pack of cards may be used for playing a variety of card games, with varying elements of skill and chance, some of which are played for money (e.g., poker and blackjack games at a casino). Playing cards are also used for illusions, cardistry, building card structures, cartomancy and memory sport.
The front (or "face") of each card carries markings that distinguish it from the other cards in the pack and determine its use under the rules of the game being played. The back of each card is identical for all cards in any particular pack to create an imperfect information scenario. Usually every card will be smooth; however, some packs have braille to allow blind people to read the card number and suit.
Podcasts:
-
by Fabolous
-
by Mario
-
by DJ Jazzy Jeff The Fresh Prince
-
by Nina Sky
-
by Living Death
-
by Kool G. Rap
Holla Back
by: Fabolous[Fabolous talking before first verse]
Brooklyn, uh uh uh uh
Huh Huh uh huh do it huh Yea
Uh Uh do it huh huh what ya'll want huh
[Verse 1]
Rollin, gold two seater
Stash in the dash
Hole through heaters
Blockahhhhh put holes through beaters
Ghetto Fab stroll through Cheetahs
Ballin, Brooklyn dawn
Addicted to Crys hooked on Don
15 G's hookers on
Ma, I wanna see how you look in thongs
Hustlin, guys that send Po's
Cause I chop rocks the size of mentos
Blame me, trials aquit those
Look at the hurt your eyes will squit close
Pimpin' here's a new way to flirt
Listen to the two way alert
It goes (2 way beeps in song's beat)
Lets go VIP boo raise your skirt
[Chorus 1]
Holla back Young'n (Hoooo Hoooo!)
Holla back (Hoooo Hoooo!)
Holla back Young'n (Hoooo Hoooo!)
Holla back (Hoooo Hoooo!)
Holla back Young'n (Hoooo Hoooo!)
Holla back (Hoooo Hoooo!)
Holla back Young'n (Hoooo Hoooo!)
Holla back (Hoooo Hoooo!)
[Verse 2]
I'm Gangsta
Ya'll just wannabe's
Federal Agents on their P's
30 grand 28 on the keys
Gotta good lawyer I'm gonna squeeze
Thuggin' jeans and Tim's
Fitted to the front lean the brim
Ride but never on teenage rims
And I keep a chick's face between limbs
Stylin ya'll heard about my kick game
I'm on the parkway see me at the Knick game
Probably seen this tatted on your chick frame
F-A-B-O-L-O-U-S
Ridin Ya'll know as well I do
That's the way you can tell I flew
So I got a deal I sell pot too
Cause before I hit the pens I'm gettin bailed by Clue
[Chorus 2]
Holla back Young'n (Hoooo Hoooo!)
Holla back (Hoooo Hoooo!)
Holla back Young'n (Hoooo Hoooo!)
Holla back (Hoooo Hoooo!)
Holla back Young'n (Hoooo Hoooo!)
Holla back (Hoooo Hoooo!)
Holla back Young'n (Hoooo Hoooo!)
Holla back (Hoooo Hoooo!)
[Verse 3]
Cruisin top on the Mercedes low
Turn us up when you hear this on the radio
Blastin with the nineteen eighty flow
Make the necks on the ladies go (wooo wooop)
Holla that's what a pretty thug will do
Hit Branson get a fifty jug or two
Ya'll throwin on them gritty mugs for who
Like ya'll don't know what fifty slugs will do
Hatin I just bought the bulls
I put ya'll in the front page articles
I got em lookin at the billboard charts confused
And I still freestyle to start the Clue's
Reppin I'm that kid about the doe
I done copped coke and started droughts before
Shit Platinum out the door
Now I drop the top down just to shout to hoes
[Chorus 3]
Holla back Young'n (Hoooo Hoooo!)
Holla back (Hoooo Hoooo!)
Holla back Young'n (Hoooo Hoooo!)
Holla back (Hoooo Hoooo!)
Holla back Young'n (Hoooo Hoooo!)
Holla back (Hoooo Hoooo!)
Holla back Young'n (Hoooo Hoooo!)