Wrench Posted March 16, 2016 Posted March 16, 2016 what I've got is an aircraft with a total fuel capacity of 464 gallons, split between 7 tanks 2 inner wing 2 outer wing (larger tanks) 2 tip tanks 1 fuselage tank (smallest) nothing I've searched out has any information on how much which tank holds. Other than the total this is what I have at the moment (and KNOW is wrong!) [FuselageFuelCell] SystemType=FUEL_TANK FuelTankID=1 MaxFuelAmount=35.30 SelfHealing=TRUE FireSuppression=TRUE MinExtentPosition=-0.45,-0.65,-0.42 MaxExtentPosition=0.45,-1.60, 0.16 HasArmor=TRUE ArmorMaterial=STEEL Armor[FRONT].Thickness=2 Armor .Thickness=2 Armor .Thickness=2 Armor[REAR].Thickness=2 Armor[bOTTOM].Thickness=2 Armor[TOP].Thickness=2 [LeftWingFuelCell] SystemType=FUEL_TANK FuelTankID=2 MaxFuelAmount=251.7 SelfHealing=TRUE FireSuppression=TRUE MinExtentPosition=-3.30,-0.70, 0.06 MaxExtentPosition=-5.30,-1.70, 0.17 HasArmor=TRUE ArmorMaterial=STEEL Armor[FRONT].Thickness=2 Armor .Thickness=2 Armor .Thickness=2 Armor[REAR].Thickness=2 Armor[bOTTOM].Thickness=2 Armor[TOP].Thickness=2 [RightWingFuelCell] SystemType=FUEL_TANK FuelTankID=2 MaxFuelAmount=251.7 SelfHealing=TRUE FireSuppression=TRUE MinExtentPosition=3.30,-0.70, 0.06 MaxExtentPosition=5.30,-1.70, 0.17 HasArmor=TRUE ArmorMaterial=STEEL Armor[FRONT].Thickness=2 Armor .Thickness=2 Armor .Thickness=2 Armor[REAR].Thickness=2 Armor[bOTTOM].Thickness=2 Armor[TOP].Thickness=2 [innerLeftWingFuelCell] SystemType=FUEL_TANK FuelTankID=2 MaxFuelAmount=81.62 SelfHealing=TRUE FireSuppression=TRUE MinExtentPosition=-0.90,-0.00, 0.04 MaxExtentPosition=-1.60,-2.00, 0.15 HasArmor=TRUE ArmorMaterial=STEEL Armor[FRONT].Thickness=2 Armor .Thickness=2 Armor .Thickness=2 Armor[REAR].Thickness=2 Armor[bOTTOM].Thickness=2 Armor[TOP].Thickness=2 [innerRightWingFuelCell] SystemType=FUEL_TANK FuelTankID=2 MaxFuelAmount=81.62 SelfHealing=TRUE FireSuppression=TRUE MinExtentPosition=0.90,-0.00, 0.04 MaxExtentPosition=1.60,-2.00, 0.15 HasArmor=TRUE ArmorMaterial=STEEL Armor[FRONT].Thickness=2 Armor .Thickness=2 Armor .Thickness=2 Armor[REAR].Thickness=2 Armor[bOTTOM].Thickness=2 Armor[TOP].Thickness=2 [LeftWingTipTank] SystemType=FUEL_TANK FuelTankID=3 MaxFuelAmount=250.0 SelfHealing=FALSE FireSuppression=FALSE MinExtentPosition=-6.10,-2.76,-0.02 MaxExtentPosition=-6.68,0.03,0.49 HasArmor=TRUE ArmorMaterial=ALUMINIUM Armor[FRONT].Thickness=2 Armor .Thickness=2 Armor .Thickness=2 Armor[REAR].Thickness=2 Armor[bOTTOM].Thickness=2 Armor[TOP].Thickness=2 [RightWingTipTank] SystemType=FUEL_TANK FuelTankID=3 MaxFuelAmount=250.0 SelfHealing=FALSE FireSuppression=FALSE MinExtentPosition=6.10,-2.76,-0.02 MaxExtentPosition=6.68,0.03,0.49 HasArmor=TRUE ArmorMaterial=ALUMINIUM Armor[FRONT].Thickness=2 Armor .Thickness=2 Armor .Thickness=2 Armor[REAR].Thickness=2 Armor[bOTTOM].Thickness=2 Armor[TOP].Thickness=2 what my question(s) is/are: what (again!) is the unit used for the fuel mass? kgs? liters? lbs? I can assume (oh! that damn word again!!), that I can make the 6 "main" tanks pretty much all the same capacity, with the fueselage tank having the least i hate math... Quote
Trotski Posted March 16, 2016 Posted March 16, 2016 I would say that generally 200 gallon tip tanks is about the norm, which is about 1340 lbs and looking at the way you have distributed it, and comparing to a Sabre, you have the ratios not far off, I reckon those amounts are most likely in Gallons . Quote
Fubar512 Posted March 16, 2016 Posted March 16, 2016 Kevin, Weights are in kilograms. 464 gallons of jet fuel@6.8 lbs per gallon = 3155 lbs, which in turn translates to 1431.17 kg. Summing up the values of all those tanks comes out to 1201.94, which is simply bad math (or using the wrong weight value for JP-5, which comes out to 6.8 lbs per gallon at 59 degrees Fahrenheit). If we convert gallons directly to liters, we arrive at 1756.43, so it's not a value in liters. 1 Quote
Tzareff Posted March 16, 2016 Posted March 16, 2016 I think third wire use kilograms for fuel capacity measure. So if you have max internal fuel for the aircraft in galons you must convert them in liters then mulyiply by 0.8 to get the exact fuel weight in kilograms ... or simply use that tble: http://www.streamline-ops.com/en/info/fuel_weight_conversion_tables/ Its definetly kilograms because in the MiG-21MF original data ini is stated that internal fuel tnks have capcity of 2198?? wich is the max fuel of MiG-21MF in kg 2200kg acoring to this site: http://www.airwar.ru/enc/fighter/mig21mf.html Quote
+KnightWolf45 Posted March 16, 2016 Posted March 16, 2016 SF his all in metric sistem sizes weight speeds etc! Quote
+Cliff7600 Posted March 16, 2016 Posted March 16, 2016 I've already done things like that. Here's my way of dealing with it : If you know where the tank is located in the aircraft, define some min / max extent values (with ruler tools or LOD viewer) Then... take the dimension of the length, width and height of the box. multiply the three values (in meters) and multiply by 1000 => you have the weight for the same amount of water. As it's not water, multiply by the coefficient that fit the best for avgas or jetfuel (something like 0.78 / 0.8) and you have your weight in kg. Do that for all the tanks and edit the values to have the right amount of fuel (because tanks are not boxes all the time, they're cylinder sometimes, and not perfect cylinders) exemple : MinExtentPosition=-0.56,3.09,-0.66 MaxExtentPosition=0.56,4.03,-0.02 0.56 + 0.56 = 1.12 (-0.56 and 0.56 are the same length each side of zero) 4.03 - 3.09 = 0.94 (4.03 and 3.09 are both +) 0.66 - 0.02 = 0.64 (-0.66 and -0.02 are both -) 1.12 x 0.94 x 0.64 = 0.673792 0.673792 x 1000 = 673.792 Liter of water 673.792 x 0.78 = 525.55776 kg of fuel (0.78) so 525.56 kg It may not give the right amount of fuel but it gaves a proportionality between several tanks, to decrease or increase the finale values. Sorry for the maths... :^l 2 Quote
+russouk2004 Posted March 20, 2016 Posted March 20, 2016 research real life tanks....then its added to the tanks ini file in weapons folder in the tanks data.ini this is the Tank370_F16_PAK [WeaponData001]TypeName=Tank370_F16_PAKFullName=370-gal Drop Tank PAKModelName=Tank370_F16_PAKMass=1500.000000Diameter=0.580000Length=4.300000SubsonicDragCoeff=0.147000SupersonicDragCoeff=0.279000AttachmentType=SpecificStationCode=NationName=StartYear=0EndYear=0Availability=0BaseQuantity=0Exported=FALSEExportStartYear=0ExportEndYear=0ExportAvailability=0WeaponDataType=5MaxFuelAmount=1410.000000Asymmetrical=FALSE Quote
KJakker Posted March 20, 2016 Posted March 20, 2016 (edited) I was playing around with the B-52's fuel capacity and found this data for fuel weight. I don't know how accurate it is so you might want to cross check it. Jet A is the same as JP-8 and weights 6.76 LBS/gallon Jet B is the same as JP-4 6.36 LBS/gallon JP-5 was for carrier based jet fuels (low flash for safety) and is 6.8 LBS/gallon. Using the pounds per gallon of JP-4 listed above I get the weight below. If you need avgas for WWII prop planes that is a different LBS/gallon ratio than any jet fuel. 464 x 6.36 = 2951.04 lbs The number of pounds above converted to kilograms gives me this. 1338.5692275648 kg If the numbers you entered for each fuel tank are gallons then converted to Pound and Kilograms I get the numbers below. Gallons to Pounds [FuselageFuelCell] SystemType=FUEL_TANK FuelTankID=1 MaxFuelAmount=224.508 [LeftWingFuelCell] SystemType=FUEL_TANK FuelTankID=2 MaxFuelAmount=1600.812 [RightWingFuelCell] SystemType=FUEL_TANK FuelTankID=2 MaxFuelAmount=1600.812 [innerLeftWingFuelCell] SystemType=FUEL_TANK FuelTankID=2 MaxFuelAmount=519.1032 [innerRightWingFuelCell] SystemType=FUEL_TANK FuelTankID=2 MaxFuelAmount=519.1032 [LeftWingTipTank] SystemType=FUEL_TANK FuelTankID=3 MaxFuelAmount=1590.0 [RightWingTipTank] SystemType=FUEL_TANK FuelTankID=3 MaxFuelAmount=1590.0 Total Fuel Amount in Pounds = 7644.3384 Gallons to Kilograms [FuselageFuelCell] SystemType=FUEL_TANK FuelTankID=1 MaxFuelAmount=101.835116 [LeftWingFuelCell] SystemType=FUEL_TANK FuelTankID=2 MaxFuelAmount=726.116109 [RightWingFuelCell] SystemType=FUEL_TANK FuelTankID=2 MaxFuelAmount=726.116109 [innerLeftWingFuelCell] SystemType=FUEL_TANK FuelTankID=2 MaxFuelAmount=235.461251 [innerRightWingFuelCell] SystemType=FUEL_TANK FuelTankID=2 MaxFuelAmount=235.461251 [LeftWingTipTank] SystemType=FUEL_TANK FuelTankID=3 MaxFuelAmount=721.211868 [RightWingTipTank] SystemType=FUEL_TANK FuelTankID=3 MaxFuelAmount=721.211868 Total Fuel Amount in Kilograms = 3467.413572 Edited March 20, 2016 by KJakker 1 Quote
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