G.Force, you might familiar with this term. when you are in the giant wheel, little G-force can be experienced. But this is very small amount, we can not even sustain this small amount of G-force, then think about the Astronauts and fighter Pilots. they has to sustain the G-force of amount 3G to 10G.
Earth gravity is 9.8 m/s2.
3G = 3 * 9.8 m/s2
now imagine 10G = 10* 9.8 m/s2
At this higher G-force our blood pressure goes to higher, and sometimes it leads to death.
There are two types of people experienced this G-force on a regular basis. Astronauts and fighter plane pilots.
Astronauts experiences when they are taking-off and re-entry situation. particularly when they re-entry.
when Astronauts re-entry to the earth atmosphere their space shuttle velocity is about 28,000 km/hr, this is hypersonic speed. at this situation they experience 10G.and their blood pressure is higher. To withstand this force they ware G-Suits.
How G-suit work : The suit is only pair of Chaps that has a waist that wraps around your
gut. It has a hose that plugs into the aircraft which forces compressed
air into bladders built into the suit. When the aircraft makes tight
turns, causing g loads on the pilot, it forces the air into the lower
legs, thighs, and gut area to force blood back up into the torso and to
prevent it from pooling into your legs.
If they lose too much blood from their head under these loads they will
lose consciousness and pass out. Once they pass out they will lose control
and risk crashing. The G suit does not do all the work however, it only
helps. The Astronaut in the spacecraft still has to do an
enourmous amount of work to retain consciousness. They must flex the
muscles in their legs and abs as hard as he can and take short, forced
breaths.
After the re-entry Astronauts were loose their consciousness and feel giddy. It will take a week for them to come to normal situation.
Hello friends you might heard the story in MAHABARATHA, in which Arjuna was built a ladder to heaven through which Bheema was traveled.Yes its a story written by great "Vyasa maharshi". The same thing is going to be real now, you can travel to space and that too takes 5 hours journey, you can observe our Earth curvature and the sky turns to black color from blue. Which sounds like a Sci-fi movie story.
But this is not a story, this is real and this is really possible in our world, which is called SPACE ELEVATOR.
"Elevator to space". A space transportation system.Yuri Artsutanov first proposed the idea in 1960, and up until 15 years ago it was purely in the realm of science fiction. But Sumio Iijima's discovery of CARBON NANOTUBES (CNTs) in 1990 and Bradley Edward's engineering research in 2001 is clearing the road map to a space elevator's construction. Scientists today are conducting a lot of research in the field of nanotube tethers for commercial applications on Earth. Sooner than most people expect, I hope a space-elevator-capable CNT tether will become available and kick the space elevator's development into high gear.
A space elevator is essentially a long cable extending from our planet's surface into space with its center of mass at geostationary Earth orbit (GEO), 35,786 km in altitude. Electromagnetic vehicles traveling along the cable could serve as a mass transportation system for moving people, payloads, and power between Earth and space. Current plans call for a base tower approximately 50 km tall -- the cable would be tethered to the top. To keep the cable structure from tumbling to Earth, it would be attached to a large counterbalance mass beyond geostationary orbit, perhaps an asteroid moved into place for that purpose.
Carbon nanotube :
CNT is a new form of carbon, equivalent to a flat graphene sheet rolled into a tube. CNT exhibits extraordinary
mechanical properties: the Young's modulus is over 1 TeraPascal and the estimated tensile strength is 200 GigaPascals. Fiber materials such as graphite, alumina, and quartz have exhibited tensile strengths greater than 20 GPa during laboratory testing for cable tethers. The desired strength for the space elevator is about 62 GPa. Carbon nanotubes have exceeded all other materials and appear to have a theoretical strength far above the desired range for space elevator structures. "The development of carbon nanotubes shows real promise," said Smitherman. "They're lightweight materials that are 100 times stronger than steel."
And there are some more technologies to build such a elevator.but CNT is the present assumption.
In his last years, Sir Arthur C. Clarke predicted that the space elevator will be built "about 10 years after everyone stops laughing". I believe people will stop laughing once a proper tether is demonstrated, and we think that this will happen within 5 to 10 years. Hopefully that means about 15 to 20 years before the first launch.
This is the new concept of light weighted helicopter with TANDEM DUCTED ROTOR design.
The passenger capacity is two and it will not take more space, it can be folded flat.
The Hummel could be of great help in emergency situations, when there is minimal space, because of its small size and folding ability.
Hemmel means "Bumble bee"
But this is just a conceptual design.It won't take much time for prototype.
It can be used for passenger transport, emergency transports like organs or units of stored blood and for conventional tasks, such as monitoring (e.g. coast guard, police, army, scientists).
" TILTROTOR" this is the new terminology we hearing now a days. All the aviation people use to think about such a design which uses VTOL and Fixed wing aircraft. We think this design is not implemented yet, but this is.
Yes what you heard is right. it is implemented and waiting for FAA certification.
AGUSTAWESTLAND is one of the aviation firms made this dream come true. The shown pictures are the AW609 aircraft.
The unique characteristics of the AW609 Tiltrotor combine the benefits of a helicopter and a fixed wing aircraft into one aircraft. Taking off and landing vertically, flying above adverse weather conditions with up to nine people in comfort in a pressurised cabin at twice the speed and range typical of helicopters, the AW609 represents the next generation of aircraft transport for civil (both private and commercial operators), government and para-public roles. This multi-role aircraft can be configured for passenger transport, search and rescue, law enforcement, maritime surveillance, training and government applications. The AW609 will be certified for instrument flying in known icing conditions and features a composite fuselage and wings, an advanced glass cockpit and full fly-by-wire digital controls. These advanced technologies will provide new levels of performance, reliability and affordability for future operators.
The performance characteristics of the AW609 offer coast guards capabilities and cost-effectiveness simply not available in any other single aircraft. The AW609 offers coast guard operators highly cost-effective and time efficient point-to-point transportation at speeds up to 275 knots and ranges up to 700 nm.
The AW609 is a multi-mission tiltrotor aircraft designed to employ the speed of a turboprop airplane with the vertical takeoff and landing capability of a helicopter offering unique capabilities to EMS/SAR operators. For EMS and SAR operations, the AW609 offers basket, litter and a 600 lb capacity exterior hoist option.
The AW609 offers speed, range, all weather capability and comfort making it an ideal aircraft to transport crew offshore. Designed from the outset for low maintenance and maximum operational flexibility, the AW609 will offer operators cost-effective, point-to-point transportation at cruise speeds up to 275 knots and at ranges up to 700 nautical miles. This long range capability makes the AW609 particularly suited to “deepwater” operations in the Oil & Gas industry.
The AW609 offers new flexibility in transport for VVIPs and Heads of State. The combination of vertical takeoff and landing together with range capability and speed enable the VVIP to reach distant congested urban areas directly, quickly and with high levels of security. The pressurised spacious cabin provides a comfortable and productive working environment and the aircraft has ample space to carry any necessary luggage.
AW609 Demonstration
TECHNICAL DATA:
Weights
Max take off
7620
kg
16800
lb
Max useful load
2495
kg
5500
lb
Engine Rating (2 x Pratt & Whitney PT6C-67A)
Take off power
1447
kW
1940
shp
Maximum continuous power
1249
kW
1675
shp
Fuel Capacity
Standard*
2470
lb
369
USgal
* Unusable Fuel 50 l (13 USgal)
Crew
Pilots / Passengers
2 / 9
External Dimensions
Length (overall)
14.04
m
46
ft
Overall height
5.10
m
16.70
ft
Prop rotor diameter
7.92
m
26
ft
Performance (ISA - MTOW - pending certification)
Max demonstrated speed
616
km/h
333
kts
Max cruise speed
509
km/h
275
kts
Rate of climb
n.a.
m/s
n.a.
ft/min
Operational ceiling
7620
m
25000
ft
Max range (standard tanks)
1296
km
700
nm
Cabin pressure altitude
8000
ft
2438
m
EQUPMENT
Pressurised cabin
Fly by wire flight control system
Heated composite rotor blades
Nine seat interior with soundproofing
AVIONICS SYSTEMS
3 multi-function active matrix Liquid Crystal Displays (LCDs)
Full IFR package
Dual-channel Nacelle Interface Unit (NIU) (each nacelle)
The most common orbit used for satellite communications is the geostationary orbit (GEO). This is the orbit described above – the rotational period is equal to that of the Earth. The orbit has zero inclination so is an equatorial orbit (located directly above the equator). The satellite and the Earth move together so a GEO satellite appears as a fixed point in the sky from the Earth.
The advantages of such an orbit are that no tracking is required from the ground station since the satellite appears at a fixed position in the sky. The satellite can also provide continuous operation in the area of visibility of the satellite. Many communications satellites travel in geostationary orbits, including those that relay TV signals into our homes.
However, due to their distance from Earth GEO satellites have a signal delay of around 0.24 seconds for the complete send and receive path. This can be a problem with telephony or data transmission. Also, since they are in an equatorial orbit, the angle of elevation decreases as the latitude or longitude difference increases between the satellite and earth station. Low elevation angles can be a particular problem to mobile communications.
Low Earth Orbit/Medium Earth Orbit
A low earth orbit (LEO), or medium earth orbit (MEO) describes a satellite which circles close to the Earth. Generally, LEOs have altitudes of around 300 – 1000 km with low inclination angles, and MEOs have altitudes of around 10,000 km.
A special type of LEO is the Polar Orbit. This is a LEO with a high inclination angle (close to 90degrees). This means the satellite travels over the poles.
Satellites that observe our planet such as remote sensing and weather satellites often travel in a highly inclined LEO so they can capture detailed images of the Earth’s surface due to their closeness to Earth. A satellite in a Polar orbit will pass over every region of Earth so can provide global coverage. Also a satellite in such an orbit will sometimes appear overhead (unlike a GEO which is only overhead to ground stations on the equator ). This can enable communication in urban areas where obstacles such as tall buildings can block the path to a satellite. Lastly, the transmission delay is very small.
Any LEO or MEO system however , for continuous operation, requires a constellation of satellites. The satellites also move relative to the Earth so wide beam or tracking narrow beam antennas are needed.
Elliptical Orbit
A satellite in elliptical orbit follows an oval - shaped path. One part of the orbit is closest to the center of Earth (perigee) and another part is farthest away ( apogee ). A satellite in this type of orbit generally has an inclination angle of 64 degrees and takes about 12 hours to circle the planet. This type of orbit covers regions of high latitude for a large fraction of its orbital period.
Earth gravity is 9.8 m/s2. 
The most common orbit used for satellite communications is the geostationary orbit (GEO). This is the orbit described above – the rotational period is equal to that of the Earth. The orbit has zero inclination so is an equatorial orbit (located directly above the equator). The satellite and the Earth move together so a GEO satellite 
