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XLR99-RM-2A Changes #2998

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Sep 15, 2024
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XLR99-RM-2A Changes #2998

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99f15d4
XLR99-RM-2A Changes
Its-Just-Luci Aug 15, 2024
ded7300
Improve XLR99 config
Capkirk123 Sep 15, 2024
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98 changes: 53 additions & 45 deletions GameData/RealismOverhaul/Engine_Configs/XLR99_Config.cfg
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Original file line number Diff line number Diff line change
Expand Up @@ -4,35 +4,36 @@
// Manufacturer: Reaction Motors
//
// =================================================================================
// XLR99-RM-2
// XLR99-RM-1
// X-15
//
// Dry Mass: 415 Kg
// Thrust (SL): 202 kN
// Thrust (Vac): 224 kN
// ISP: 220 SL / 244 Vac // slightly inaccurate VAC; Highest ISP was 230 at 18,700ft
// Burn Time: 360
// Chamber Pressure: 4.13 MPa
// Dry Mass: 413 kg 910 lbs dry [C, p.205]
// Thrust (SL): ??? kN
// Thrust (Vac): 257.3 kN 57850 lbf@100kft [C, p.210] or 57000 lbf@45kft [C, p.205]
// ISP: 230 SL / 276 Vac 230@sea level [C, p.205], 265@45kft [C, p.205], 276@100kft [C, p.210]
// Burn Time: 180
// Chamber Pressure: 4.14 MPa 600 psi [C, p.210]
// Propellant: LOX / Ammonia
// Prop Ratio: 1.25
// Throttle: 100% to 30%
// Throttle: 100% to 40% Capable of 30% thrust, but limited to 50% (early engines) or 40% (later engines) due to combustion stability issues [C, p.210]. Attempted operation at 35% thrust resulted in engine shutdown [C, p.220]
// Nozzle Ratio: 9.8
// Ignitions: 6
// Ignitions: 100 rated for 100 starts [C, p.210]
// =================================================================================
// XLR99-RM-2A
// X-15A-3
// XLR99-RM-1A
// X-15A-2
// Recontoured nozzle plus 22.5:1 radiative extension. No other changes.
//
// Dry Mass: ??? Kg
// Thrust (SL): 202 kN
// Thrust (Vac): 224 kN
// ISP: 200 SL / 276 Vac // slightly inaccurate VAC; Highest ISP was 230 at 18,700ft
// Burn Time: 360
// Chamber Pressure: 4.13 MPa
// Dry Mass: 432 kg Guessing about 19 kg for nozzle extension (roughly the same as RL10A-4 extension)
// Thrust (SL): ??? kN
// Thrust (Vac): 281.9 kN 63378 lbf [C, p.226]
// ISP: 200 SL / 298 Vac 200@SL (calculated with RPA), 298@cav [C, p.226]
// Burn Time: 180
// Chamber Pressure: 4.14 MPa
// Propellant: LOX / Ammonia
// Prop Ratio: 1.25
// Throttle: 100% to 30%
// Nozzle Ratio: ???
// Ignitions: 6
// Throttle: 100% to 40%
// Nozzle Ratio: 22.5
// Ignitions: 100
// =================================================================================
//
// ==================================================
Expand All @@ -47,10 +48,15 @@
// X-15 Propulsion System, AIAA paper 97-2682
// [B] History of Liquid Propellant Rocket Engines, George P. Sutton, Page 314 Table 7.2-2
// http://www.astronautix.com/x/x-15a-3.html
//
// [C] X-15 Extending the Frontiers of Flight, Dennis R. Jenkins
// https://ntrs.nasa.gov/api/citations/20080008340/downloads/20080008340.pdf

// Used by:

// Notes:
// C p. 565 SERJ
// C p. 575 delta-wing X-15

// ==================================================
@PART[*]:HAS[#engineType[XLR99]]:FOR[RealismOverhaulEngines]
Expand Down Expand Up @@ -80,14 +86,15 @@
type = ModuleEngines
modded = false
configuration = XLR99-RM-2
origMass = 0.412
origMass = 0.413
CONFIG
{
name = XLR99-RM-2
specLevel = operational
minThrust = 67.2
maxThrust = 224
minThrust = 102.9
maxThrust = 257.3
heatProduction = 100
varyFlow = 0.0263 //[C, p.415] +-1500 lbf(!) throttle error at 57000 lbf nominal thrust
PROPELLANT
{
name = LqdAmmonia
Expand All @@ -108,22 +115,24 @@
}
atmosphereCurve
{
key = 0 244
key = 1 220
key = 0 276
key = 1 230
}
ullage = False
pressureFed = False
ignitions = 6
ignitions = 100
IGNITOR_RESOURCE
{
name = ElectricCharge
amount = 1.00
}

//X-15: 169 flight attempts, 10 failures (4 cycle, 6 ignition)
//X-15 could actually usually restart after an ignition failure. Since this is not a feature in TF, halve ignition failures.
TESTFLIGHT:NEEDS[TestLite|TestFlight]
{
name = XLR99-RM-2
ratedBurnTime = 3600 // "required overhaul after 1 hour of burn time"
ratedBurnTime = 3600 // "required overhaul after 1 hour of burn time".
ratedContinuousBurnTime = 180 // 180s rated burntime at full thrust
safeOverburn = true
overburnPenalty = 1 //No penalty
Expand All @@ -135,23 +144,23 @@
key = 1.00 1.00 3 3
}

// static-fired for long periods between refurb.
ignitionReliabilityStart = 0.94
ignitionReliabilityEnd = 0.996 // pretty much all flights were successful, but ground tests failed
ignitionReliabilityStart = 0.977941
ignitionReliabilityEnd = 0.995588
ignitionDynPresFailMultiplier = 10.0
cycleReliabilityStart = 0.94
cycleReliabilityEnd = 0.99 // very low chance early on, but 1% chance of failing after 2700s
cycleReliabilityStart = 0.971557
cycleReliabilityEnd = 0.994311
reliabilityDataRateMultiplier = 20
}
}
CONFIG
{
name = XLR99-RM-2A
specLevel = concept
minThrust = 76.0
maxThrust = 253.4 //correct for increased expansion ratio
specLevel = prototype //engine was tested.
minThrust = 112.8
maxThrust = 281.9
heatProduction = 100
massMult = 1.1 //idk, a little more for the nozzle extension
massMult = 1.046
varyFlow = 0.0263
PROPELLANT
{
name = LqdAmmonia
Expand All @@ -172,12 +181,12 @@
}
atmosphereCurve
{
key = 0 276
key = 0 298
key = 1 200
}
ullage = False
pressureFed = False
ignitions = 6
ignitions = 100
IGNITOR_RESOURCE
{
name = ElectricCharge
Expand All @@ -186,8 +195,8 @@

TESTFLIGHT:NEEDS[TestLite|TestFlight]
{
name = XLR99-RM-2A
ratedBurnTime = 3600 // "required overhaul after 1 hour of burn time"
name = XLR99-RM-2
ratedBurnTime = 3600 // "required overhaul after 1 hour of burn time".
ratedContinuousBurnTime = 180 // 180s rated burntime at full thrust
safeOverburn = true
overburnPenalty = 1 //No penalty
Expand All @@ -199,12 +208,11 @@
key = 1.00 1.00 3 3
}

// static-fired for long periods between refurb.
ignitionReliabilityStart = 0.94
ignitionReliabilityEnd = 0.996 // pretty much all flights were successful, but ground tests failed
ignitionReliabilityStart = 0.977941
ignitionReliabilityEnd = 0.995588
ignitionDynPresFailMultiplier = 10.0
cycleReliabilityStart = 0.94
cycleReliabilityEnd = 0.99 // very low chance early on, but 1% chance of failing after 2700s
cycleReliabilityStart = 0.971557
cycleReliabilityEnd = 0.994311
reliabilityDataRateMultiplier = 20
techTransfer = XLR99-RM-2:50
}
Expand Down