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Im a pilot at zero four flight school in margate,currently studying for my commercial pilots licence. I really love muscle cars and hope to oneday own a 1967 mustang fastback,its also my dream to get into an international airline as the pilot in command.

22/08/2011

The Ipad is the pilots best friend

ipadpilotDelta Airlines has deployed 22 iPads into its global pilot workforce, as a preliminary trial of the iPad's ability to act as an electronic flight bag. They're not the first to do so, with American Airlines bagging that title after they gained FAA approval back in 2010, but Delta's move points to a growing trend among fliers--if your job or pastime involves gliding through the air, then the iPad is about to revolutionize the experience.
For Delta, the iPads act as a lighter, more efficient and more up-to-date version of the little leather trolley case pilots usually have to haul around with pounds of flight plans, weather charts, and other paperwork they need to fly airliners. It's part of a bigger digital overhaul for Delta, which has integrated Gogo's in-flight Wi-Fi to its domestic fleet, enabling pilots to get up-to-date information and even company emails as they fly... and Delta's also experimented with loaning iPads as entertainment units to customers.
All Delta's pilot's tablets have the same core software, which contain charting apps, company flight manuals in PDF format, a custom meteorology app from Delta which includes the company's own real-time radar data, an app for writing notes, and crew rest calculators for longer flights. The company can also push real-time security updates to all its iPad crew in-flight, and even direct them into new re-routes as they fly.
But while Delta is going down the custom app route, the huge suite of apps for pilots in the App Store proves that it's a massive industry. ForeFlight Mobile HD is a good example, claiming to be the "perfect pilot-companion: in-flight or on the ground," it's typical of the more full-featured apps. In addition to offering flight planning that's infinitely easier than is usually required--it integrates routing information and weather into a single display that you simply have to touch ("drag your route line around weather")--it also incorporates downloadable packages that report airport procedures and maps, it also lets you check fuel prices, airspace restrictions, and weather forcasts are presented as interactive maps before you fly. Because it's a real-time service, it's actually a subscription app--and there's a more expensive Pro edition that actually tracks you in-flight, keeping "tabs on groundspeed, tract and geometric altitude" all with the "standard pinch to zoom and panning gestures."
Back in July 2010, Plane And Pilot Mag profiled 20 apps that were useful for pilots, ranging from the free and simple AeroWeather to Jeppesen, a professional grade app that details the approach procedures for airports around the globe, and one that Delta is using as part of its trial.
Everything from pre-flight planning to in-fight emergency weather updates can be delivered via the iPad--and if there's an emergency, the manuals are all electronic and searchable, potentially saving vaulable time instead of having pilots flick through a paper copy.
Proof positive that the iPad's innovation is also changing the entire flight industry comes from British Airways: It's trialing them as dynamic, real-time data tools for senior flight crew--helping them move passengers to connecting flights and replacing the paper-based manifests that have been law since commercial flying began.
Bonus: American Airlines, during its iPad trial program, suggested that by ditching the heavy paper-based pilot flight bags for iPads, they'd save enough weight to reduce their annual fuel bill by $1.2 million. Which also means less polluting fuel is burned.

16/08/2011

VOR tracking beacons

VORs are assigned radio channels between 108.0 MHz (megahertz) and 117.95 MHz (with 50 kHz spacing); this is in the VHF (very high frequency) range. The first 4 MHz is shared with the ILS band (See Instrument landing system). To leave channels for ILS, in the range 108.0 to 111.95MHz, the 100 kHz digit is always even, so 108.00, 108.05, 108.20, and so on are VOR frequencies but 108.10, 108.15, 108.30, and so on, are reserved for ILS.
The VOR encodes azimuth (direction from the station) as the phase relationship of a reference and a variable signal. The omni-directional signal contains a modulated continuous wave (MCW) 7 wpm Morse code station identifier, and usually contains an amplitude modulated (AM) voice channel. The conventional 30 Hz reference signal is on a 9960 Hz frequency modulated (FM) subcarrier. The variable amplitude modulated (AM) signal is conventionally derived from the lighthouse-like rotation of a directional antenna array 30 times per second. Although older antennas were mechanically rotated, current installations scan electronically to achieve an equivalent result with no moving parts. When the signal is received in the aircraft, the two 30 Hz signals are detected and then compared to determine the phase angle between them. The phase angle by which the AM signal lags the FM subcarrier signal is equal to the direction from the station to the aircraft, in degrees from local magnetic north, and is called the "radial."
This information is then fed to one of four common types of indicators:
  1. An Omni-Bearing Indicator (OBI) is the typical light-airplane VOR indicator[3] and is shown in the accompanying illustration. It consists of a knob to rotate an "Omni Bearing Selector" (OBS), and the OBS scale around the outside of the instrument, used to set the desired course. A "course deviation indicator" (CDI) is centered when the aircraft is on the selected course, or gives left/right steering commands to return to the course. An "ambiguity" (TO-FROM) indicator shows whether following the selected course would take the aircraft to, or away from the station.
  2. A Horizontal Situation Indicator (HSI) is considerably more expensive and complex than a standard VOR indicator, but combines heading information with the navigation display in a much more user-friendly format, approximating a simplified moving map.
  3. A Radio Magnetic Indicator (RMI), developed previous to the HSI, features a course arrow superimposed on a rotating card which shows the aircraft's current heading at the top of the dial. The "tail" of the course arrow points at the current radial from the station, and the "head" of the arrow points at the reciprocal (180 degrees different) course to the station.
  4. An Area Navigation (RNAV) system is an onboard computer, with display, and up-to-date navigation database. At least two VOR stations, or one VOR/DME station is required, for the computer to plot aircraft position on a moving map, or display course deviation relative to a waypoint (virtual VOR station).
D-VORTAC TGO (TANGO) Germany
In many cases, VOR stations have co-located DME (Distance Measuring Equipment) or military TACAN (TACtical Air Navigation) — the latter includes both the DME distance feature and a separate TACAN azimuth feature that provides military pilots data similar to the civilian VOR. A co-located VOR and TACAN beacon is called a VORTAC. A VOR co-located only with DME is called a VOR-DME. A VOR radial with a DME distance allows a one-station position fix. Both VOR-DMEs and TACANs share the same DME system.
VORTACs and VOR-DMEs use a standardized scheme of VOR frequency to TACAN/DME channel pairing so that a specific VOR frequency is always paired with a specific co-located TACAN or DME channel. On civilian equipment, the VHF frequency is tuned and the appropriate TACAN/DME channel is automatically selected.