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Fuel Calculations


Wrench
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Hey guys.

I've been getting more into detail as of late, so I'd like to do proper fuel calcs.

 

I'm wondering how one would do them the old-school way: pen and paper.

 

It's a good thing to know, and I'd like to build an excel sheet that does it.

I have a drag index calc made, and I flow FlyingSquirrel made a calc program, but I'd like to make something in excel so I can customize it and get whatever data I want.

 

If anyone can help, let me know.

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Interesting subject that's for sure. I only started doing this myself and I don't calculate yet -- all depends on weight, burn rate and flight profile. For now I am testing CAS missions - max range of 250nm, 10 minutes of CAS itself, 2000lbs bingo fuel in this SIM it works. Also I have downloaded T.O. 1A-10C-1 Flight Manual and will take it from there. Lets see what others say, I am with you on this.

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Hey guys.

I've been getting more into detail as of late, so I'd like to do proper fuel calcs.

 

I'm wondering how one would do them the old-school way: pen and paper.

 

It's a good thing to know, and I'd like to build an excel sheet that does it.

I have a drag index calc made, and I flow FlyingSquirrel made a calc program, but I'd like to make something in excel so I can customize it and get whatever data I want.

 

If anyone can help, let me know.

The 476th 3-3 (written by crew chiefs that worked and are still working on the A-10C) presents this table:

 

NO8emAL.png

 

Interesting subject that's for sure. I only started doing this myself and I don't calculate yet -- all depends on weight, burn rate and flight profile. For now I am testing CAS missions - max range of 250nm, 10 minutes of CAS itself, 2000lbs bingo fuel in this SIM it works. Also I have downloaded T.O. 1A-10C-1 Flight Manual and will take it from there. Lets see what others say, I am with you on this.
Be aware that the 1A-10C-1 is not a freely distributed and obtainable document: unless you have written consent from the DoD I'd be careful with similar statements.
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Fair enough, to me anything searchable through Google.com means public. However as I have not obtained nor I am going to obtain written consent from any DoD I have now safely disposed of said PDF file and replaced it with the virtual 3-3, however this does not satisfy my need as I still need to decipher Mission Task column. Said document seems to skip that information or my PDF search skills suck (unlike Google.com search skill in which I am proficient it would seem).

 

Anyway, I would be keen to learn more about Mission Task column items - anybody can help with that?

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No wonder I could not find TO 1A-10C-1-1

 

 

Be aware that the 1A-10C-1 is not a freely distributed and obtainable document: unless you have written consent from the DoD I'd be careful with similar statements.

 

So no chance for TO 1A-10C-1-1 neither? What a world...

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Yeah that's the current state of things. There was a post about it from Snoopy but I can't seem to find it right now.

 

If you want study the airframe the 1A-10A-1 is available, and most of the information in there regarding hydraulics, engines, electronics and so on are applicable to the C variant.

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Thanks, that 1A-10A-1 I've had this one for quite some time now, but I am after -1-1 as it is needed for calculations ;) Any chance explaining 3-3 Mission Tasks - just need to get this in some valuable context, example Cruise - Low / Mid / High - what are the MSL values for these?

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Thanks, that 1A-10A-1 I've had this one for quite some time now, but I am after -1-1 as it is needed for calculations ;) Any chance explaining 3-3 Mission Tasks - just need to get this in some valuable context, example Cruise - Low / Mid / High - what are the MSL values for these?

 

The 1A-10A-1 includes the -1-1 at the end.

 

I have produced a dedicated fuel/time planner for the a10c using the charts from 1A-10A-1-1 (not public though) taking into account almost eveything applicablw to dcs and my conclusion is:

 

The chart gliptal posted from the 476-3-3 works fine and provides a very accurate estimation for fuel planning. So if you want to go crazy with calculations then awesome, but if you want a quick an easy way to plan for fuel, that chart gives you everything you need for the A-10.


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Do you have a valid link for that one as it seems my copy does not contain -1-1 at the end?

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Thank you. I want to go crazy. Can anybody decipher that first column from 3-3 screen grab posted before as well please?

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NO8emAL.png

.

 

Thank you. I want to go crazy. Can anybody decipher that first column from 3-3 screen grab posted before as well please?

 

Overhead landing pattern:

${1}

 

Cruise is flying around 300 - 325 KGS

Low alt: 0ft - 10000ft

Med alt: 10000ft - 30000ft

High alt: 30000ft - Saturn

 

All the other ones are self explanatory.

 

Conventional Range pass is a lap around the Practice Range. Something Like this:

${1}

 

For quick calculations you can also use:

combat Fuel Flow is in the range of 6000-6300 lbs/hr.

Loiter Fuel Flow is around 3000.

both depending on altitude obviously.

 

Other notes:

- From my calcs, drag index isn't much of a factor, gross weight is the most important one.

- Wind and Outside Air Temperature play a big part too.

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Kimi_uy - thanks a lot, much appreciated.

 

@Wrench - I feel this sums this up, happy calculations.

 

PS Kind of took the lead here, I am sorry for stealing the thread, all in good faith though ;)

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