I know that this has been mentioned once or twice, please add Redispatch as a specific Topic in Feature Requests.
Redispatch is an ESSENTIAL feature of real world long haul flying. The increased payload and/or increase range possible makes the difference profitability and loss, especially in freight flying.
Also Redispatch is just smart for fuel and route planning. It gives a pre-planned diversion option in event of unexpected changes in fuel burn (due weather deviations, lower flight levels than planned, etc.). And it keeps the pilots’ brains active on long routine flights, because you have to be sure to meet the criteria at the redispatch point to continue to intended destination and not be forced to divert.
The simple thing to recall/retain is that for the flight segment to the redispatch point you carry reserve only to the “diversion” airport (not to intended destination). Then you start from scratch, requiring reserve only for redispatch point to intended destination (“recycling” that previous reserve). And even smarter, because you carry less reserve fuel, burn is reduce for the same route because less reserve means less weight carried.
Just rule of thumb, napkin calculations, picture this:
- 8 hour flight on a 744 with an AVERAGE burn of 10,000KG/hr = 80,000 KG fuel burn
- Standard Dispatch, 5% reserve required = 4,000 KG fuel reserve
- Redispatch at 5 hours into the flight:
3.1 Initial dispatch 5% reserve required = 2,500 KG fuel reserve
3.2 Redispatch 5% reserve required = 1,500 KG BUT it’s onboard already in the above 2,500 KG
This is a simple example, but here you see nearly 2,000 KG less fuel (the fuel saved plus the fuel not burned to carry that fuel) on every flight, or more payload, or getting the same payload off a smaller runway, etc.
Redispatch rules! Up vote redispatch! Viva SimBrief and Navigraph!