Bug #17975
Dumpling and doughnut tanks incorrect mass
30%
Description
The Dumpling tank is listed as .3375 tonnes empty mass in the config file. Should be .01375
The Doughnut is listed as .01, should be .0375
History
#1 Updated by RuBisCO1 about 6 years ago
- File ToroidTank.cfg added
- File RadialTank_Round.cfg added
- File RadialTank_Capsule.cfg added
Also fuel:ox ratio is incorrect: Normal ratio is 9:11, but the 'R-4' has a ratio of 5:6 and 'R-11' has a ratio of 4:5, these leaves extra fuel/oxide after use.
I have changed the fuel amounts and masses of my tank .cfg files to fix this.
'R-12' Toriod: mass = 0.025
'R-11' Capsule: mass = 0.0375, fuel amount = 40.5 oxidizer amount = 49.5
'R-4' Round: mass = 0.0125, fuel amount = 13.5 oxidizer amount = 16.5
#2 Updated by Renegrade about 6 years ago
I believe Squad has indicated that they wanted to make all LF/O tanks a 9:1 ratio (unfortunately). If this is still the case, then it should be more like this:
externalTankToroid
mass = 0.025
amount = 20.25 // LF
amount = 24.75 // O
externalTankCapsule
mass = 0.0375
amount = 30.375 // LF
amount = 37.125 // O
externalTankRound
mass = 0.0125
amount = 10.125 // LF
amount = 12.375 // O
#3 Updated by Nebbie about 6 years ago
- Status changed from New to Confirmed
- % Done changed from 0 to 10
This is a known bug, and at least for the Dumpling is fixed in 1.4.1 according to RoverDude.
#4 Updated by RuBisCO1 about 6 years ago
Renegrade wrote:
I believe Squad has indicated that they wanted to make all LF/O tanks a 9:1 ratio (unfortunately). If this is still the case, then it should be more like this:
externalTankToroid
mass = 0.025
amount = 20.25 // LF
amount = 24.75 // OexternalTankRound
mass = 0.0375
amount = 30.375 // LF
amount = 37.125 // OexternalTankCapsule
mass = 0.0125
amount = 10.125 // LF
amount = 12.375 // O
Well aside for the 9:1 mass ratios the numbers you provide makes no sense for the size of the tanks: I think you need to switch 'round' and 'capsule'. Also there is the disconcerting nature of how the 'round' tank is bigger than the old Oscar-B tank yet holds less.
#5 Updated by Renegrade about 6 years ago
I've fixed the reversal issue there.
I actually just used your dry mass figures and recomputed for 9:1. The Oscar-B probably has too much fuel anyhow, as it's about 1/6th of the volume (roughly) of a FT-100 and yet holds 40% of the fuel (1/2.5 fuel vs. 1/4 or 1/6 vol).
I thought 1.4 was supposed to involve a part balance and sanity pass, but I think that was either skipped or coming in 1.4.1. Tail fins (even the craptastic AV-T1 winglet) are still more expensive than a rocket engine (500x3 or 500x4 of those > 1200 fund T-45?? the heck?).
#6 Updated by Nebbie about 6 years ago
There was a balance pass done over Xenon and Monoprop tanks. I think they just forgot to do it on the new small LFO tanks. There has been no talk of fixing relative part costs.
#7 Updated by Squelch about 6 years ago
- Status changed from Confirmed to Being Worked On
- % Done changed from 10 to 30
#8 Updated by RuBisCO1 about 6 years ago
- File deleted (
ToroidTank.cfg)
#9 Updated by RuBisCO1 about 6 years ago
- File deleted (
RadialTank_Round.cfg)
#10 Updated by RuBisCO1 about 6 years ago
- File deleted (
RadialTank_Capsule.cfg)
#11 Updated by RuBisCO1 about 6 years ago
This all depends on what you guys want to do with the wet:dry ratio, if you want to keep it at 9:1 or not and also there is how the Oscar-B tank simply holds too much fuel compared to these tanks. To be in line with the Oscar-B these are the numbers to use:
R-4 'Dumpling' R-11 'Baguette' R-12 'Doughnut' Oscar-B
Wet Mass 0.225 0.675 0.3375 0.225
Dry Mass 0.025 0.075 0.0375 0.025
Wet:Dry Ratio 9:1 9:1 9:1 9:1
Fuel 18 54 27 18
Ox 22 66 33 22
Fuel:Ox Ratio 9:11 9:11 9:11 9:11
Prop Mass 0.2 0.6 0.3 0.2
If on the other hand the Oscar-B was to be cut to half its present fuel load then these numbers would make sense as the Dumpling is 133% the volume of the Oscar-B, and the Baguette is 400% the volume of the Oscar-B:
R-4 'Dumpling' R-11 'Baguette' R-12 'Doughnut' Oscar-B
Wet Mass 0.1485 0.4455 0.3375 0.1125
Dry Mass 0.0165 0.0495 0.0375 0.0125
Wet:Dry Ratio 9:1 9:1 9:1 9:1
Fuel 11.88 35.64 27 9
Ox 14.52 43.56 33 11
Fuel:Ox Ratio 9:11 9:11 9:11 9:11
Prop Mass 0.132 0.396 0.3 0.1