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Fuel Planning Terminology


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F70100
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Full disclosure: I'm coming back to VFR from 25 years of airline flying so by all means take all this with a pinch of salt.

I'm finding one of the terms used in SkyDemon to describe the various categories of fuel required for any particular flight somewhat misleading.

SkyDemon uses the term "Holding Time" fuel to describe what in IFR flying would be "Final Reserve" fuel. i.e. the quantity of fuel loaded which you hope never to have to burn. If it becomes apparent that an IFR flight will land with less than the full amount of Final Reserve fuel on board, it is expected that an emergency will be declared. IFR flight planning also requires a minimum of 30 minutes "holding fuel" to be carried, but this is fuel that you can use if required, and is in addition to Final Reserve fuel.

Part-NCO requires VFR flights to carry "minimum fuel reserves", and this is analogous to "final reserve" in IFR.

I respectfully suggest that the term "Holding Time" be changed to "Minimum Fuel Reserves" to emphasise the point that this fuel is the last drop available, and align the terminology with Part-NCO. If fuel is required for "holding", it might more appropriate to account for it separately, or even add it to the contingency fuel.

I'm new around here; not trying to change the world, just thinking out load really.

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Tim Dawson - 7/22/2024 9:00:39 AM
I think I've said previously on another thread here that we can't really change the "holding time" way of doing things that we currently have, because thousands of aircraft profiles have been set up with this carefully set.

However, I'm definitely open to adding another fuel line in our fuel calculations, and it sounds like "Final Reserve Fuel" would fit the bill for everyone, is that right? You would enter an amount per aircraft (not a time) and that would simply be added to your fuel calculations and weight and balance too of course.

Sounds good to me Tim; I'm sure folks can enter a Final Reserve Fuel number representing 10, 30 or 45 mins worth of fuel according to the requirements of any particular flight, and if that means that holding fuel has to be reduced to zero to accommodate it, that would highlight the issue. This would be a big help from an instructing perspective for me.

Keep up the good work!!

GO

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F70100 - 10/12/2020 4:42:58 PM
marioair - 12/16/2023 8:20:59 AM
lhe - 7/21/2024 5:13:40 PM
Tim Dawson - 7/22/2024 9:00:39 AM
F70100 - 7/22/2024 9:16:48 AM
lhe - 7/22/2024 9:39:03 AM
grahamb - 7/22/2024 10:54:14 AM
                     There are two different but related issues. - That the pilot...
lhe - 7/23/2024 4:44:18 PM
F70100 - 7/23/2024 5:16:26 PM
Tim Dawson - 7/25/2024 9:02:53 AM
lhe - 7/25/2024 12:45:16 PM
grahamb - 7/25/2024 1:38:33 PM
lhe - 7/25/2024 1:45:23 PM
                         I've quoted the regs exactly as they are. Ask our CAA what they mean!...
grahamb - 7/25/2024 2:50:46 PM
                             Both those scenarios make the case for separate fuel allocations:...
F70100 - 7/25/2024 4:11:42 PM
                                 Actually they do. The relevant parts of NCO.OP.125: The...
lhe - 7/30/2024 8:53:24 AM
Tim Dawson - 7/29/2024 9:21:10 AM

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