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More rocketplane engines (#3007)
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@Capkirk123
Capkirk123 authored Oct 19, 2024
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262 changes: 262 additions & 0 deletions GameData/RealismOverhaul/Engine_Configs/AR2_Config.cfg
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// ==================================================
// AR-1/2
//
// Manufacturer: Rocketdyne
//
// =================================================================================
// XLR42-NA-2/AR-1
// FJ-4F
//
// Dry Mass: 108.9 kg [1]
// Thrust (SL): ??? kN
// Thrust (Vac): 25.57 kN 5750 lbf@100kft [A, p.462], 5400 lbf@35kft [1]
// ISP: 180 SL / 246 Vac Estimated with RPA, assuming same efficiency as XLR11. Also matches AR2-3
// Burn Time: 180 [1]
// Chamber Pressure: 3.0? MPa estimated based on thrust gain at altitude
// Propellant: 90% HTP / JP4
// Prop Ratio: 6.5 same as AR2-3
// Throttle: N/A [A, p.462]
// Nozzle Ratio: 12 same as AR2-3?
// Ignitions: 100?
// =================================================================================
// AR-2
// Prototype
//
// Dry Mass: 103.9 kg [1]
// Thrust (SL): ??? kN
// Thrust (Vac): 29.36 kN 6600 lbf [A, p.462]
// ISP: 180 SL / 246 Vac Estimated with RPA, assuming same efficiency as XLR11. Also matches AR2-3
// Burn Time: 180 [1]
// Chamber Pressure: 3.0? MPa estimated based on thrust gain at altitude
// Propellant: 90% HTP / JP4
// Prop Ratio: 6.5 same as AR2-3
// Throttle: 50% [A, p.462]
// Nozzle Ratio: 12 same as AR2-3?
// Ignitions: 100?
// =================================================================================
// LR121-NA-1/AR2-3
// FJ-4F, F-86, NF-104A
//
// Dry Mass: 102.1 kg [1]
// Thrust (SL): ??? kN
// Thrust (Vac): 29.36 kN 6600 lbf [A, p.462]
// ISP: 195 SL / 246 Vac [1],[A, p.463]
// Burn Time: 420 [1], 120 minutes between overhaul [A, p.463]
// Chamber Pressure: 3.86 MPa [A, p.463]
// Propellant: 90% HTP / JP4
// Prop Ratio: 6.5 [A, p.463]
// Throttle: 50% [A, p.463]
// Nozzle Ratio: 12 [A, p.463]
// Ignitions: 100?
// =================================================================================

// Sources:

// [1] https://web.archive.org/web/20200229064133/http://www.alternatewars.com/BBOW/Space_Engines/Rocketdyne_Engines.htm
// [2] https://en.wikipedia.org/wiki/Rocketdyne_AR2
// [3] http://www.astronautix.com/a/ar1.html
// [4] http://www.astronautix.com/a/ar2-3.html
// [5] https://ntrs.nasa.gov/api/citations/20000033615/downloads/20000033615.pdf
// [6] https://web.archive.org/web/20130216051328/http://sscfreedom.ssc.nasa.gov/etd/ETDPropulsionSS_H2O2AR23.asp
// [7] https://hydrogen-peroxide.us/uses-monoprop-steam-generation/NASA-Marshall-The-Peroxide-Pathway-early2000s.pdf
// [8] https://www.designation-systems.net/usmilav/engines.html#_MILSTD1812
// [9] https://www.hydrogen-peroxide.us/history-US-Reaction-Motors/AIAA-2001-3838_History_of_RMI_Super_Performance_90_Percent_H2O2-Kerosene_LR-40_RE-pitch.pdf
// [10] https://www.thisdayinaviation.com/tag/rocketdyne-lr121/
// [11] https://www.history.navy.mil/content/dam/nhhc/research/histories/naval-aviation/Naval%20Aviation%20News/1960/pdf/jan62.pdf
// [A] History of Liquid Propellant Rocket Engines, George P. Sutton


// Used by:

// Notes:

// * AR-1, AR-2 and AR2-1 are pressure-fed, AR2-2 and AR2-3 are pumpfed [A, p.462]
// * Only AR-1 and AR2-3 ever flew, the rest were developmental models
// * LR42-NA-2 refers to AR-1 [11, p.14], even model number because it was a Navy project (FJ-4 was a navy aircraft)
// * LR46-NA-2 is mostly identical to the AR-1, but modified for use in the A3J/A-5 [11, p.14]
// * LR54-NA-2 is mostly identical to the AR-1, but modified for use in the F8U-1F [11, p.14]
// * LR121(-NA-1) refers to AR2-3 [8/10]? Odd model number because NF-104A was a USAF project
// ==================================================
@PART[*]:HAS[#engineType[AR2]]:FOR[RealismOverhaulEngines]
{
%title = #roAR2Title //AR-1/2
%manufacturer = #roMfrRocketdyne
%description = #roAR2Desc

@tags ^= :$: USA north american rocketdyne ar-1 ar-2 ar2-3 xlr42 xlr46 xlr54 xlr121 liquid pressure-fed pump spaceplane kerosene htp

%specLevel = operational

@MODULE[ModuleEngines*]
{
%EngineType = LiquidFuel
}

!MODULE[ModuleEngineConfigs],*{}
!MODULE[ModuleAlternator],*{}
!RESOURCE,*{}

!MODULE[ModuleGimbal],*{}

MODULE
{
name = ModuleEngineConfigs
type = ModuleEngines
modded = false
configuration = XLR42-NA-2
origMass = 0.1089
CONFIG
{
name = XLR42-NA-2
description = AR-1. Experimental pressure-fed super-performance booster for FJ-4F Fury.
specLevel = operational
minThrust = 25.57
maxThrust = 25.57
massMult = 1.0
heatProduction = 100
pressureFed = True
ignitions = 100
PROPELLANT
{
name = Kerosene
ratio = 0.2208
DrawGauge = True
}
PROPELLANT
{
name = HTP
ratio = 0.7792
}

PROPELLANT
{
name = Helium
ratio = 45
ignoreForIsp = True
}

atmosphereCurve
{
key = 0 246
key = 1 180
}

TESTFLIGHT:NEEDS[TestLite|TestFlight]
{
ratedBurnTime = 3600 //very simple and primitive, reused extensively. Give 1 hour
ratedContinuousBurnTime = 180 //3 minutes

//can't find flight data, but was apparently pretty reliable. Same as XLR11-RM-13
ignitionReliabilityStart = 0.95
ignitionReliabilityEnd = 0.99
ignitionDynPresFailMultiplier = 10.0
cycleReliabilityStart = 0.95
cycleReliabilityEnd = 0.998
}
}
CONFIG
{
name = AR-2
description = Improved model, with throttle capability. Tested, but never flew.
specLevel = Prototype
minThrust = 14.68
maxThrust = 29.36
massMult = 0.9541
heatProduction = 100
pressureFed = True
ignitions = 100
PROPELLANT
{
name = Kerosene
ratio = 0.2208
DrawGauge = True
}
PROPELLANT
{
name = HTP
ratio = 0.7792
}
PROPELLANT
{
name = Helium
ratio = 45
ignoreForIsp = True
}
atmosphereCurve
{
key = 0 246
key = 1 180
}
TESTFLIGHT:NEEDS[TestLite|TestFlight]
{
ratedBurnTime = 3600 //very simple and primitive, reused extensively. Give 1 hour
ratedContinuousBurnTime = 180 //3 minutes
//can't find flight data, but was apparently pretty reliable. Same as XLR11-RM-13
ignitionReliabilityStart = 0.95
ignitionReliabilityEnd = 0.99
ignitionDynPresFailMultiplier = 10.0
cycleReliabilityStart = 0.95
cycleReliabilityEnd = 0.998
techTransfer = XLR42-NA-2:50
}
}
CONFIG
{
name = LR121-NA-1
description = AR2-3. Pump-fed model, able to share fuel tanks with jet engine. Used on the FJ-4F, F-86F(R), and NF-104A for astronaut training.
specLevel = Operational
minThrust = 14.68
maxThrust = 29.36
massMult = 0.9376
heatProduction = 100
pressureFed = False
ignitions = 100
PROPELLANT
{
name = Kerosene
ratio = 0.2208
DrawGauge = True
}
PROPELLANT
{
name = HTP
ratio = 0.7792
}

atmosphereCurve
{
key = 0 246
key = 1 195
}

//FJ-4F: 103 flights, ??? failures
//F-86F(R): 31 flights, ??? failures
//NF-104A: 302 flights, 2 failures? (2 inflight explosions)
//flew a lot, apparently never had a significant failure
//Assume twice as many ignition failures? (Aircraft could just return to airfield on failure to ignite)
TESTFLIGHT:NEEDS[TestLite|TestFlight]
{
ratedBurnTime = 7200 //120 minutes between overhaul
ratedContinuousBurnTime = 420 //7 minutes?

// assume roughly exponential relationship between chamber pressure and lifespan
thrustModifier
{
key = 0.00 0.05 0 0
key = 1.00 1.00 3 3
}

ignitionReliabilityStart = 0.986232
ignitionReliabilityEnd = 0.997826
ignitionDynPresFailMultiplier = 10.0
cycleReliabilityStart = 0.992029
cycleReliabilityEnd = 0.998741
techTransfer = AR-2,XLR42-NA-2:50
}
}
}
}
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