Hello Mi Fans,
From caveman time onwards, humans dreamed of flying high like free birds. Only Superman like fictional characters has the capability to fly (even I dreamed of flying like Superman in my childhood). But now technology has progressed so hugely, it's nearly possible to fly high not only like birds but even faster than jets! And yes, with the help of 'Jet Packs', the 21st-century innovation, it's possible! So in this thread, we'll discuss how a Jet Pack works and the technology used in this innovation!
A Jet Pack, rocket belt or rocket pack is a device, usually worn on the back, which uses jets of gas (or in some cases liquid) to propel the wearer through the air. The concept emerged from science fiction in the 1960s and became popular as the technology became a reality. The most common use of the Jet Pack has been in extra-vehicular activities for astronauts. Despite decades of advancement in the technology, many obstacles remain in the way of use of the jetpack in the military or as a means of personal transport, including the challenges of Earth's atmosphere, Earth's gravity, low energy density of available fuels, and the human body not being naturally adapted to fly. To compensate for the limitations of the human body, the Jet Pack must accommodate for all factors of flight such as lift and stabilization.
How Jet Packs Work
Rocket belts run on hydrogen peroxide fuel, which is not explosive on its own. This makes rocket belts slightly safer than Jet Packs. When the hydrogen peroxide is combined with pressurized liquid nitrogen and a silver catalyst, the chemical reaction generates superheated steam that shoots out of twin rocket nozzles at 1,300 degrees Fahrenheit (704.4 degrees Celsius). There's no flame, but it's still extremely dangerous. The result is 800 horsepower or about 300 pounds of thrust [source: CNN.com]. Hydrogen peroxide is a good, reliable fuel, and it's only by-product is water. However, it's very expensive, costing about $250 per gallon (3.78-liters). Each flight uses almost all of the fuel in the tank -- about seven gallons (26.5-liters) per flight.
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The typical rocket belt weighs 125 pounds (56.7 kilograms) and the pilot has to weigh 175 pounds (79.4 kilograms) or less, or the rockets won't provide enough lift. The right hand controls the throttle, while the left hand controls yaw, which is side-to-side motion. Although rocket belts have short flight times, they can reach speeds up to 80 mph and they accelerate incredibly quickly. Landing is accomplished by gradually easing up on the throttle
Most of the devices we refer to as jetpacks are actually rocket packs. By definition, a rocket carries all of its fuel with it, and to achieve propulsion, the fuel and oxidizer (liquid oxygen) get mixed together and combusted without any intake of outside air. The basic principle on which a jetpack works is Newton’s Third Law (every action has an equal and opposite reaction). The hot gas produced when fuel is burned in the combustion chamber shoots downwards, which in turn produces an upward thrust. Piece of cake, right?
This looks easy in theory, but the actual practical approach is a bit more complicated. A jetpack is basically a miniature rocket, which sounds awesome! Now, imagine flying with it. Still excited by the prospect?
The world’s top jetpack concepts
1. Martin Jetpack
Listed in Time magazine's Top 50 Inventions for 2010, the Martin Jetpack is the world's first practical jetpack, manufactured by the Martin Aircraft Company. It will be commercially available by 2017.
2. Jet Pack H202
The Jet Pack H202 is made by a company founded by Troy Widgery, Jet Pack International (Jet PI), based in the US. It is a personal jetpack powered by hydrogen peroxide (H2O2), with flight capabilities having been demonstrated at various events by Jet PI.
3. Jet Pack H202-Z
Also known as the Go Fast Jet Pack, the H202-Z is an advanced variant of the Jet PI's H202. The device develops more thrust, range and endurance than its predecessor.
4. TAM Rocket Belt
The TAM Rocket Belt is produced by Tecnologia Aeroespacial Mexicana (TAM), based in Mexico. The jetpack is offered along with a training and support package, including test flights, as well as installation, maintenance, and round the clock technical support.
5. ThunderPack TP-R2G2
The ThunderPack Revision-2 Generation-2 (TP-R2G2) from Thunderbolt Aerosystems is the successor to the TP-R1G2 jetpack. The TP-R2G2 is produced in two variants; TP-R2G2M (monopropellant model) and TP-R2G2D (dual-fuel model).
6. Yves Rossy's Jet Wingpack
The Jet Wingpack was developed by Swiss ex-military and commercial pilot Yves Rossy. It integrates aeroplane-type rigid wing panels, with a span of approximately 2.4m (6.6ft), and four small jet engines.
Why isn’t Jet Packs feasible for commercial use?
Unfortunately, human beings simply aren’t meant to fly. Being relatively squat and unwieldy creatures, we require a large amount of force to be lifted into the air. Secondly, creating that amount of lift with a rocket-propulsion system means burning a lot of fuel, so until recently, even the best jetpacks could only stay in the air for about 30 seconds. Even if we did make a fully functional jetpack that the average consumer could buy, it would only be available at astronomical rates (about $100,000). We’d all have to go “Breaking Bad” just to own one of those bad boys… not to say that it wouldn’t be worth it!
So what do you guys think? Will Jet Packs be the future of transportation? Do REPLY down your opinions below!
Source: 1, 2, 3
[Discussion] Jet Pack: Technology Behind - Explained!