1. Cruise Profile
Select the aircraft’s Performance Profile used to determine the flight’s cruise speed. Only ForeFlight Performance Profiles are supported in Dispatch; custom profiles such as Basic or By-Altitude profiles cannot be selected. Cruise profiles are generally named after either their associated Mach speed number or range vs. speed considerations (e.g. Max Range Thrust vs. Max Speed Thrust).
Cruise Advisor allows you to quickly compare multiple cruise profiles and evaluate the performance results of each one at multiple nearby altitudes, making it easy to settle on the cruise/altitude combination that best fits the flight’s objectives.
Click the Cruise Advisor button below the Cruise Profile selector to open Cruise Advisor. Three cruise profiles are shown along the top of the view - the first is the currently-selected cruise profile and the other two can be changed by clicking on them to select other profiles from a dropdown menu. Along the left side of the view are five altitudes surrounding and including your currently-selected altitude. Available altitudes are filtered to only show those allowed based on your flight’s East/West direction.
The 15 cells formed by the intersecting rows and columns show the calculated winds, ETE, and fuel burn values for each combination of cruise profile and altitude. The values for ETE and fuel burn are shaded green in two of the cells; these indicate which of the 15 cruise/altitude combinations result in the lowest ETE and fuel burn, respectively. Note that these are only the lowest values among those shown at any one time - these values are not necessarily the lowest possible values that could be attained by selecting different cruise profiles or altitude ranges.
Click on each of the cells to highlight their associated cruise profiles and altitudes, and click “Select Profile and Flight Level” to confirm the current selection. Dispatch will apply whichever cruise profile and altitude you select to the flight.
2. Taxi Fuel
Specify the expected quantity of fuel that will be burned while taxiing at the departure and destination airports combined, including start-up fuel. This field uses the default value for the selected aircraft profile, but you can also change it as required for each flight.
3. Fuel Policy
The Fuel Policy selector provides a number of options for calculating total (“block”) fuel that will be in the aircraft’s fuel tanks at engine start. Some policies require no additional input, and some allow you to specify certain values that will factor into the calculation.
- Minimum Fuel Required - calculates the legal minimum amount of fuel needed to land at the destination airport with reserve and alternate fuel. Requires no additional input from the user.
- Maximum Fuel - calculates the maximum amount of fuel that can be loaded before exceeding any structural weight limits or the limit for total usable fuel configured for the aircraft. Requires no additional input from the user.
- Extra Fuel - adds a new field to the right of the Fuel Policy selector where you can specify a fuel amount in addition to the minimum fuel required for the flight.
- Manual Fuel - adds a new field to the right of the Fuel Policy selector where you can manually specify the total amount of fuel in the tanks at engine start.
- Landing Fuel - adds a field to the right of the Fuel Policy selector where you can specify a fuel amount to have in the tanks upon landing at your destination. Dispatch will then calculate the total fuel required at the engine start to achieve the specified value. The fuel amount entered must be greater than the sum of reserve and alternate fuel.
4. Destination Services: FBO
View available FBOs at the destination airport with fuel prices and select one for the flight. Click the dropdown menu to select from a list of all FBOs at the destination airport, with basic information about each FBO such as the primary phone number, radio frequency, and fuel prices for different fuel types. If you have a linked JetFuelX account with contract fuel prices at that FBO then your lowest contract price is shown below the retail price for each fuel type. Featured FBOs are listed at the top and highlighted in yellow, while other FBOs are shown below in white.
Once you select an FBO its details are shown below the Destination Services field.
5. Advanced Fuel Options
Click the “(Show)” button next to Advanced Fuel Options to reveal additional fields relating to reserve fuel and winds aloft models.
6. Reserve Fuel Policies
Reserve fuel is a quantity of fuel to be carried on a flight in addition to the fuel required to reach the planned destination and the fuel required to reach any planned alternates. How this quantity is calculated depends on the regulatory environment and rules under which the flight is conducted. Dispatch provides a number of reserve fuel policies that will automatically calculate the smallest quantity of reserve fuel needed to satisfy different regulatory requirements.
Reserve fuel is always added to the flight’s total fuel in addition to the flight’s destination fuel and alternate fuel quantities. You can see the reserve fuel quantity and equivalent flight time near the middle of the flight data readout’s right column.
When using a reserve fuel policy that mandates contingency fuel, you can see the contingency fuel quantity and equivalent flight time just above the Alternate fuel in the flight data readout. Dispatch calculates contingency fuel by choosing the greater of either the percentage of trip fuel required for that reserve policy (typically 5% or 10%), or the equivalent of 5 minutes fuel at holding speed 1,500 feet above the destination airport. You can also define a custom contingency fuel percentage for each aircraft in the Aircraft view [click here].
Manual - Allows you to manually enter the reserve fuel quantity in the aircraft’s default fuel units using the field to the right of the Reserve Fuel selector.
- Manual (minutes) - Allows you to manually enter the reserve fuel quantity’s equivalent flight time in minutes based on top of descent fuel consumption rate using the field to the right of the Reserve Fuel selector.
- FAA Part 91/135 - Adds a quantity of fuel equivalent to 45 minutes of flight time using the top of descent fuel consumption rate.
- FAA Part 121 - Adds a quantity of fuel equivalent to 45 minutes of flight time using the top of descent fuel consumption rate.
- FAA Part 121 International - Adds 10% contingency fuel (10% of the time to destination converted to a fuel quantity using the top of descent fuel consumption rate) plus a quantity of fuel equivalent to 30 minutes of flight time using the holding pattern fuel consumption rate (1,500’ AGL at destination airport, standard holding speed, standard temperature conditions).
- EASA General Aviation - Adds a quantity of fuel equivalent to 45 minutes of flight time using the top of descent fuel consumption rate.
- EASA Commercial - Adds 5% contingency fuel (5% of the fuel to destination) plus one of the following:
- If an alternate airport is selected, a quantity of fuel equivalent to 30 minutes of flight time using the holding pattern fuel consumption rate.
- If no alternate airport is selected, a quantity of fuel equivalent to 45 minutes of flight time using the holding pattern fuel consumption rate.
- IAP - Adds a quantity of fuel equivalent to 2 hours of flight time using the top of descent fuel consumption rate.
7. Contingency Fuel Policies
Some reserve fuel policies require you to carry an additional quantity of contingency fuel, typically either 5% or 10% of total trip fuel. The Contingency Policy selector allows you to use this “default” value to calculate how much contingency fuel is required based on the selected reserve fuel policy or select the RCF (Reduced Contingency Fuel) policy, also known as pre-clearance planning in the United States.
- Default - calculates the quantity of contingency fuel required based on the flight’s selected reserve fuel policy.
RCF (Reduced Contingency Fuel) - calculates the minimum quantity of contingency fuel required by comparing your planned flight with a second flight that has a different destination airport. Reduced contingency fuel allows you to select a decision point and a 2nd destination. You may need to select an alternate for your 2nd destination if the weather requires so. ForeFlight Dispatch will then calculate two flights plans:
- One flight plan from your departure to your 2nd destination via the decision point, using your defined contingency percentage (usually 5%).
- Another flight plan from your departure to your primary destination with contingency fuel calculated as 5% of the trip fuel from the decision point to the primary destination.
The minimum required contingency fuel under RCF then becomes the greater of the minimum required fuel for the two flight plans.
Decision Point - the waypoint used to calculate the fuel requirements for the flight to the second destination airport. This may be any waypoint in your primary route.
2nd Destination - the second destination airport used to calculate fuel requirements in conjunction with the decision point.
- 2nd Dest. Route - a route from your decision point to the second destination. At this time this route must be entered manually.
- 2nd Dest. Alt. - a weather alternate for your second destination airport, if one is required.
8. Wind Model
Wind Models allow you to change the source of Dispatch’s winds aloft information used to calculate total route performance.
Forecasted - uses global winds aloft forecasts from the Global Forecast System (GFS). Can be used for flights with ETDs up to seven days in the future. This Wind Model will generally provide the most accurate winds aloft data since it’s based on actual forecasts. This is the default Wind Model.
Historical - uses global historical winds aloft data from the National Center for Atmospheric Research (NCAR) at NOAA. Historical winds are derived from monthly average winds over the past 40 years, so all flight plans within a given month will use the same winds aloft data when the Historical Wind Model is selected.
Selecting Historical winds also adds a Probability dropdown menu to the right of the Wind Model selector, allowing you to manually set how optimistic the historical winds used should be. Each Probability setting reflects the likelihood that the actual winds aloft during the flight will be at least as good as those used to calculate the flight’s performance. Thus, 50% Probability yields the absolute average of winds aloft during the selected month, yet there is an even chance that the actual winds will be less favorable than planned. On the other hand, 95% Probability yields very pessimistic winds aloft, yet it is nearly certain that the actual winds will be more favorable than planned.
Fixed - uses a single wind component and ISA deviation to calculate performance for the entire flight. Selecting Fixed winds adds two new fields to the right of the Wind Model selector: Wind Component and ISA Dev. The Wind Component field allows you to specify a fixed wind speed in knots, followed by an H or a T to indicate if the wind is a headwind or tailwind, respectively. The ISA Dev field allows you to specify a positive or negative temperature deviation from the standard atmosphere - you can manually enter a number in the field, or use the up and down arrows that appear on the right when you click in the field to adjust the value in steps.
NOTE: Dispatch will not allow flight plans to be filed when the Historical or Fixed wind models are selected. These wind models are intended for scenario planning only and should not be relied on to calculate a flight’s actual expected performance. Changing the wind model to Forecast will allow the flight plan to be filed again.