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Author Topic: Cargo % split issue when at max range  (Read 790 times)

Offline sanabas

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Cargo % split issue when at max range
« on: December 24, 2019, 07:57:40 AM »
In the age of flight, route BV 013 flies RJTT-OTBD. The outbound flight is limited to 77 pax, return flight 85 pax. There is demand for both light & standard cargo.

Plane flying the route has 70 seats, cargo capacity of 10.15 m^3/2350kg.

If I set cargo to 100% light, the route planning says my available supply is 690kg outbound, 1020kg return. Which appears correct, weight limited outbound, volume limited return.

If I set cargo to 100% standard, the route planning says my available supply is 690kg outbound, 1440kg return. Weight limited both ways.

But when I set it to a mixture, I get the following results:
5% light - 30/660 out, 70/1370 return Return supply stays correct all the way, so I'll only list outbound.
10% light - 70/620
15% light - 100/590
20% - 140/550
25% - 170/520 all fine until this point, all those numbers are accurate.

But then the outbound breaks and the standard cargo supply disappears...

30% light - 210 light/0 standard available, should be 210/480
35% - 240/0
40% - 280/0
45% - 310/0
50% - 350/0

This lasts all the way to 100% light. It's weight limited the whole way, volume isn't an issue, there's 690kg available for cargo. The light cargo is correct all the way, it's x% of 690, rounded to the nearest 10kg. But as soon as I move from a 25/75 light/std split to 30/70 or more, the standard cargo supply disappears.

I can't find any other routes with a similar issue, but I'll search. I have some others that are max range and so limited, but not to quite the same extent. They're working fine, same as the return flight on this route is.

Attached pic shows 25/75 split on the left, 30/70 split on the right.


Offline sanabas

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Re: Cargo % split issue when at max range
« Reply #1 on: December 24, 2019, 04:13:10 PM »
Happening on multiple new routes as well, all these routes have L-1049 supers with 70 seats scheduled.

BV 131: Limited to 81 pax, so with 70 seats that's ~1100kg. Anything up to 50% light cargo gives a correct split, i.e. 550/550 at 50/50, 270/820 at 25/75. But up it to 55% light cargo and the standard cargo availability disappears, it goes to 600/0 instead of 600/500.

The return flight, BV 132 is the same. Limited to 71 pax, so very limited cargo weight. It won't let me have any standard supply, if I set it to 0% light/100% standard, I get 0 availability. If I go 100% light/0% standard, I get 160kg light. Any percentage in between just drops the light amount by 10kg per 5%, without ever giving standard availability.

BV 133 has only 68 pax available, so no room for cargo. The return flight, BV 134, is limited to 77 pax. 700kg of light or standard if set to 100%. Up to 25% light is fine, 25/75 split gives 180/530. 30% or higher breaks it, 30/70 gives 210kg light, 0 standard.

BV 135 is limited to 69 pax, so no cargo. Return flight, BV 136, is limited to 78. 770kg of either at 100%, up to 35/65 split is fine, with 270/500, 40% or higher breaks it, 40/60 gives 310 light, 0 standard.

Offline sanabas

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Re: Cargo % split issue when at max range
« Reply #2 on: December 24, 2019, 04:20:18 PM »
Also tested BV 17, which is limited to 85 pax outbound, 83 return, and also has a 70 seat plane flying it. Both have a split for all increments, weight limited 1430kg out, 1320kg return for all standard, volume limited 1020 each way for all light. The standard doesn't disappear at any point, however the splits themselves are weird.
60% light/40% standard gives 540/900 out, 790/530 return.
55/45 gives 470/960 out
50/50 gives 720/720 out, 660/660 return.
45/55 gives 650/790 out
40/60 gives 570/860 out, 530/790 return.

So the return seems to be all correct, but the outbound breaks in a different way once it goes to 55% light or higher, 55/45 actually outputs as 33/67 the other way. As it increments up from 55/45, it correctly changes the split each time, but it changes from that original broken point and remains ~20% off. So 80/20 gives 810/510, a roughly 60/40 split.

So 71-81 pax limit all break at a certain point, 85 breaks differently, and 83 seems fine.

« Last Edit: December 24, 2019, 04:38:59 PM by sanabas »

Offline JumboShrimp

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Re: Cargo % split issue when at max range
« Reply #3 on: December 24, 2019, 06:08:03 PM »
I am guessing here that there is a 500kg minimum for Standard Cargo.

Offline sanabas

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Re: Cargo % split issue when at max range
« Reply #4 on: December 24, 2019, 08:40:50 PM »
I am guessing here that there is a 500kg minimum for Standard Cargo.

Hadn't noticed that, but you could be right, the ones that break all seem to do so as standard drops below 500. It's not a hard limit though, other airline's route on RJTT-YSSY has 110 light/180 std available on a DC-6. Might be a specific issue with the constellation?

Offline Talentz

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Re: Cargo % split issue when at max range
« Reply #5 on: December 24, 2019, 09:19:48 PM »
Uh.. Each of the different cargo(s) have minimum space (m3) and weight (kg) values requirements. All three are different from one another. This is really evident in aircraft with limited amount of cargo room (m3).

I suppose you could ask Sami what the exact values are... if that's your thing.



Talentz
Co-founder and Managing member of: The Star Alliance Group™ - A beta era, multi-brand alliance.

Offline sanabas

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Re: Cargo % split issue when at max range
« Reply #6 on: December 25, 2019, 12:10:11 AM »
I suppose you could ask Sami what the exact values are... if that's your thing.

Easy to work out just looking at plane configs that are volume constrained. 10m^3 = 1t light cargo or 2.5t standard cargo. 100kg light needs 1m^3, 100kg standard needs 0.4m^3. Not sure on heavy, haven't seen a plane that's volume locked for it. Not sure there'd be one.

Standard cargo may have a minimum space/weight requirement, but in these cases, my Constellations are above that, as they've got more than 7m^3 of space and 400+kg available once the light cargo is accounted for, and there are DC6s in game flying routes with both less space & less weight available and having std supply available.

Offline sanabas

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Re: Cargo % split issue when at max range
« Reply #7 on: January 07, 2020, 06:40:33 AM »
Hadn't noticed that, but you could be right, the ones that break all seem to do so as standard drops below 500. It's not a hard limit though, other airline's route on RJTT-YSSY has 110 light/180 std available on a DC-6. Might be a specific issue with the constellation?

The 1049 super connies consistently lose all standard cargo when the amount would be less than 500kg. Seems like it might be an issue with that specific plane, as the 749 Connies seem to be splitting properly even with smaller capacity.

 

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