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VIRFuel is a fuel and weight calculation application designed for Boeing 747, 787 Airbus A340, 330 operators using the Flywise flight plan. The application is in metric tonnes and conforms to SOPs used for Virgin Atlantic operations.
Fuel and weight data is inserted from the front page of the flight plan (the 'plan figures') and can then be updated with desired loads and actual figures from the final ZFW/loadsheet. Changes in zero-fuel weight calculate updates to trip fuel and suggest a new ramp fuel. Alternatively a manually entered ramp fuel or required extra fuel at destination will calculate updates to trip fuel and ramp fuel.
At each stage a take-off weight will be updated and TODC information calculated (a buffer of 1T is used). Fuel uplift calculations in Litres and USG are available to ensure an indicated versus calculated fuel load within +/-1.5%. Finally, flight plan waypoint fuel checks can be updated for changes in trip fuel burn.
Internal cross-checking is performed and aircraft type limits can be set using the application settings menu or from the plan input page. Engineers have the option to skip directly to the fuel uplift page. A 'swipe-to-reveal' calculator has time addition and unit conversion functions.
Multiple waypoints can be input in lat/lon or selected from a list of North Atlantic entry points. With the addition of spot groundspeeds at each waypoint the true track, distance and time estimates for each waypoint are displayed (consistent with the flight plan format) to cross check oceanic routing or to cross check re-route legs. (Distances, although rounded to the nearest NM are calculated over the earth ellipsoid to metre-level accuracy in the given direction at zero height.)
A GoogleEarth compatible file of the route waypoints can be downloaded when your device is connected to iTunes - sync your device to your iTunes app on the desktop then select the "device" from the left-hand menu bar: under the "Apps" tab select VIRFuel in the "File Sharing" window. "routeWaypoints.kml" can be selected and saved with "Save to..."
What's New in Version 3.0
Support for limit checking on B787-9/-8 and A330-3 types with 3 additional user-defined custom types (when limits differ for other operators). Option on performance weight calculation to swap between TODC with 1T buffer or use Boeing OPT weight of ZFW+Ramp Fuel.
Refuel uplift calculation updated to reflect updated limit checks and has the ability to enter fuel density as either SG, kg/m3, lb/USG or lb/ft3: the entry will be automatically converted to SG.
iOS7 and 8 updates to screen layout and code.
BETA function: display of waypoints on iOS world map.
BETA function: Metars and TAFs
A database of favourite airfields can be compiled and used to maintain a list of Metars and TAFs from the NOAA data server. The airfields also appear on the above waypoint map and can be selected to display the weather information. This feature is being developed and included for evaluation only - although the weather reports are accurately sourced from NOAA, robust format error checking is yet to be implemented.
All requests for new features have been noted!
Known Issue: Devices set to European "region formats" (Setttings>General>Language&Region) may have an issue with the interpretation of decimal points (versus commas) - an interim fix is to reset the device region to 'UK'. This wasn't evident in simulated testing but will address shortly in next update.
- Category: Utilities
- Updated: 30 October 2014
- Version: 3.0
- Size: 9.2 MB
- Language: English
- Developer: Douglas Roxburgh
- © 2011-14 DK Roxburgh
Compatibility: Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimised for iPhone 5.