Helicopters

I will answer this in simple terms and not include the AFCS (Automatic Flight Control System) that is required to smooth out inherent problems with the tandem rotor design.

The obvious starting point is the lack of Tail Rotor that conventional helicopters have. With two counter rotating rotor discs, each cancels out the torque of the other, and so no requirement of a tail rotor to keep the aircraft from spinning uncontrollably.

The pilot inputs are the same (Cyclic Stick, Collective, Yaw Pedals) and produce the same movement of the aircraft but are translated to the rotor discs in a complicated way.

Collective, or thrust as it can be known, is simple. The collective lever is pulled up and both rotor heads are fed with a mechanical linkage from the lever to pitch all blades to produce equal lift.

Roll is simple too. As the cyclic stick is moved left or right, both rotor discs will tilt in the same direction to roll the aircraft to the desired side.

Yaw is linked with Roll in the case of the Chinook, and as such both discs will tilt but in opposing directions. I.e. right pedal forward will cause the forward disc to tilt right, and the aft disc to tilt left, hence rotating the aircraft about the central vertical axis. It is possible to pivot the aircraft about either the forward or aft rotor heads by using a combination of pedal and left or right cyclic (but that requires a physics explanation)

Pitch is the most different to a conventional helicopter. Moving the cyclic stick forwards or backwards does not cause the rotor heads to both tilt forward or backward as you might imagine. Pitch outputs are linked to the collective outputs, in which I mean one rotor disc has more collective pitch applied and the other has less. I.e. cyclic stick forward causes the forward rotor disc to decrease in collective pitch (therefore dropping the nose of the aircraft down) and the aft disc to increase in collective pitch (therefore lifting the tail up) which results in pitch up or down.

That is the basic principle of Chinook flight theory. In more depth, it is necessary to say that although there is a sophisticated AFCS system, the aircraft can fly without it and does, and all flying controls are mechanically (hydraulically boosted) linked to the rotor heads.

Because of the complicated way the pilots inputs must be output to the rotor heads, the channels (Pitch/Roll/Yaw/Collective) are mixed mechanically. So as Roll and Yaw both have a tilting effects on the rotor discs, they are mixed to give one common output channel; and Collective and Pitch share the same effect on the discs and so are also mixed to give one output channel.

Further to all of this, a few facts about how the Chinook flies:

Both engines have gearboxes that attach to a central Combining Transmission, which then feeds the engine torque forward and backwards to a Forward Transmission and Aft Transmission, which each spinning the heads above them.

The Transmissions (or gearboxes) are linked therefore and in sync, so the counter-rotating blades inter twine each other and will never collide.

A common misconception is that one engine powers one head and the second the other. Both engines drive a central transmission, and it is possible to fly on one engine (although with enough weight, the aircraft would lose altitude or alternatively the remaining engine overheat)

Hydraulic pressure is provided by pumps driven by the forward and aft transmissions. Two flight hydrualic systems therefore. Again, it is possible that if one fails, the other will suffice. There is a third hydraulic system, the Utility Hydraulic system, which, should both Flight Hydraulic systems fail, can transfer its pressure into the Flight Hyd system.

All pilot inputs are hydrualically boosted via these Flight Hyd systems. The Util Hyds system powers things such as the rear ramp, centre cargo hook opening and closing, power steering, steering locks, hoist and winch, and engine starter motors.

The AFCS system allows for Pitch, Roll, and Yaw stability and eases the workload on the pilot to be constantly correcting aircraft attitude. It also allows for Height Hold (Radar Altimeter or Barometric Alitimeter), Heading Hold, Airspeed Hold, Controlled Turns, and more comlicated tasks such as levelling the fuselage during hover and forward flight, amongst other things.

I could go into depth and on forever, but the basics are easy to grasp once you get to know them.

Chinook Engineer.

The alliteration for helicopters could be higher helicopters or heavy helicopters

Thud Thud Whoomph

The word was coined towards the end of the 19th century, so no.

Most helicopters have a tail boom and tail rotor. This tail rotor is present to counteract the torque produced by a helicopters main rotor. If there was no tail rotor, the helicopter would tend to rotate in a direction opposite to that which the main rotor blade spins which would make flying difficult or even impossible.

The Chinook doesn't have a tail rotor, instead it has twin main rotors. If they both span in the same direction then this would act to cause the helicopter to twist. However as they rotate in opposite directions the two twisting forces cancel each other out. This has other advantages as it means that the full power of the engines goes towards generating lift and thrust as opposed to driving the vertical stabilising rotor on other helicopters.

They are not. Helicopters are a completely distinct type of vehicle from cars.

R300000

There are many advantages of availing private air charters as opposed to flying with the airlines. Below are just a few benefits worth considering.

• Private Charters Allow You To Customize Your Itinerary.

• Private Charters Allow You To Take Advantage Of Thousands Of Private Airports.

• Private Charters Allow You To Set Your Own Schedule.

• Private Charters Let You Travel With More Comfort.

• Private Charters Avoid Typical Airport Problems.

• Private Charters Let You Land Closer To Your Destination.

• Private Charters Allow You To Fly With Only Those You Choose To – Your Team, Friends, Or Family.

• Private Charters Let You Enjoy Private Lounges And Terminals.

Face away from the helicopter

The fastest car is faster than the fastest police helicopter. However, cars are generally limited to roads and traversible ground, whereas a helicopter can fly a straight line from point A to point B. There are several instances of criminals with fast cars who have managed to lose police helicopters in pursuit. However, they pale into insignificance against the criminals in fast cars who don't.

The physics of any rotary wing propulsion device restricts it's forward speed to around 250 mph. The fastest helicopter in the world currently is the Westland Lynx with a maximum forward speed of 249.10 mph.

Helicopter can have 2 blade, 4 Blade, 6 Blade, 8 Blades. Selection of this Blades depends up on the Power Rating. For a small 2 Ton H/C, it can have 2 Blades. 5 Ton H/C can have 4 Blades etc..

In 1 minute it will rotate half as many times = 385.

Since is minute is 60 seconds then the rate is 385/60 per second = 6.41666.

A group of helicopters.

it really just depends on the helicopter

There are six types of simple machines: lever, pulley, inclined plane, wedge, screw, and wheel and axle. A typical helicopter will contain ALL of these. Many people will think the main rotor is a screw.

Blimp=Is another form of air tranportation=

The Bell 214C is a medium-lift helicopter known for its versatility and performance. It features a single Lycoming T53-L-703 turboshaft engine, providing a maximum power output of approximately 1,400 shp. The helicopter has a maximum takeoff weight of around 10,500 lbs and a cruise speed of about 120 knots. Its range is approximately 300 nautical miles, making it suitable for various missions, including transport and utility operations.

Private aircraft and helicopters were once the realm of billionaires and large corporations. However, as commercial airlines become more expensive and highways are more crowded, business executives are turning to chartered aircraft to save time and money. Charter helicopters are primarily growing in Los Angeles and New York, where getting between locations in town is slow by car but impossible by plane. An executive could spend three hours in traffic trying to get from JFK airport to suburban Connecticut, or she could hop onto a chartered helicopter and be home in twenty minutes. These modes of transportation also have fewer accidents than car traffic, which makes chartered aircraft a safer option than ground travel as well.

Military helicopters provide protect and are a great tool used to in warfare. There are many toy helicopters that are also fun for little children to play with but they can easily break.

On average to get a top job, you will need at least 1000 hours to pilot a helicopter. For private helicopters on average between 50-55 hours is sufficient. The more hours; the better.