Add YF-73 config (#3032)

GameData/RealismOverhaul/Engine_Configs/RD100_Config.cfg

@@ -82,7 +82,7 @@
 //	5D60
 //	DF-2A
 //
-//	Dry Mass: 850? kg	reduced dry mass
+//	Dry Mass: 867? kg	reduced dry mass
 //	Thrust (SL): ??? kN
 //	Thrust (Vac): 465.82 kN		47.5 ton-force
 //	ISP: 220 SL / 248 Vac		same as RD-103?
@@ -467,7 +467,7 @@
 			minThrust = 465.82
 			maxThrust = 465.82
 			heatProduction = 45
-			massMult = 0.9572
+			massMult = 0.9763
 			ullage = True
 			pressureFed = False
 			ignitions = 0

GameData/RealismOverhaul/Engine_Configs/YF73_Config.cfg

@@ -0,0 +1,122 @@
+//	==================================================
+//	YF-73
+//
+//	Manufacturer: AALPT
+//
+//	=================================================================================
+//	YF-73
+//	Long March 3
+//
+//	Dry Mass: 245 kg		[B]
+//	Thrust (SL): ??? kN
+//	Thrust(Vac): 44.43 kN		[B]
+//	ISP: 212? SL / 419.9 Vac		[B]
+//	Burn Time: 750		[B]
+//	Chamber Pressure: 2.63 MPa		[B]
+//	Propellant: LOX / LH2
+//	Prop Ratio: 5.0		[B]
+//	Throttle: N/A
+//	Nozzle Ratio: 40	[3]
+//	Ignitions: 2		[B]
+//	=================================================================================
+
+//	Sources:
+
+//	[1] http://lpre.de/kbhm/index.htm
+//	[2] https://web.archive.org/web/20170621153836/http://www.b14643.de/Spacerockets_1/China/CZ-3/Description/Frame.htm
+//	[3] https://web.archive.org/web/20150717192824/http://www.b14643.de/Spacerockets/Diverse/Asian_Rocket_engines/engines.htm
+//	[4] http://www.braeunig.us/space/specs/lgmarch.htm
+//	[5] http://www.globalsecurity.org/space/library/report/1999/lm3bchapter2.pdf
+//	[6] http://www.globalsecurity.org/space/library/report/1999/lm2echapter2.pdf
+//	[7] https://en.wikipedia.org/wiki/YF-73
+//	[8] https://forum.nasaspaceflight.com/index.php?topic=8447.msg1104075#msg1104075
+//	[9] http://astronautix.com/y/yf-73.html
+//	[A] History of Liquid Propellant Rocket Engines
+//	[B] 世界导弹与航天发动机大全
+
+//	Used by:
+
+//	Notes:
+
+//	==================================================
+@PART[*]:HAS[#engineType[YF73]]:FOR[RealismOverhaulEngines]
+{
+	%title = #roYF73Title	//YF-73
+	%manufacturer = #roMfrAALPT
+	%description = #roYF73Desc
+
+	@tags ^= :$: prc china aalpt yf73 yf-73 liquid pump upper lqdhydrogen lqdoxygen
+
+	%specLevel = operational
+
+	@MODULE[ModuleEngines*]
+	{
+		%EngineType = LiquidFuel
+	}
+
+	!MODULE[ModuleEngineConfigs],*{}
+	!MODULE[ModuleAlternator],*{}
+	!RESOURCE,*{}
+
+	@MODULE[ModuleGimbal]
+	{
+		%gimbalRange = 24	//4-chambers with one-plane gimbal of 24 degrees
+		%useGimbalResponseSpeed = true
+		%gimbalResponseSpeed = 16
+	}
+
+	MODULE
+	{
+		name = ModuleEngineConfigs
+		type = ModuleEngines
+		origMass = 0.245
+		modded = false
+		configuration = YF-73
+		CONFIG
+		{
+			name = YF-73
+			description = Used on 3rd stage of CZ-3
+			specLevel = operational
+			minThrust = 44.43
+			maxThrust = 44.43
+			heatProduction = 100
+			ullage = True
+			pressureFed = False
+			ignitions = 2
+			massMult = 1.0
+			PROPELLANT
+			{
+				name = LqdHydrogen
+				ratio = 0.7631
+				DrawGauge = True
+			}
+			PROPELLANT
+			{
+				name = LqdOxygen
+				ratio = 0.2369
+			}
+			atmosphereCurve
+			{
+				key = 0 419.9
+				key = 1 212
+			}
+
+			//CZ-3: 13 flights, 3 failures (2 cycle, 1 restart)
+			//2 ignitions per flight
+			//13 ignitions, 0 failures
+			//13 cycles, 2 failures (1 before restart, 1 after)
+			//12 restarts, 1 failures
+			TESTFLIGHT:NEEDS[TestLite|TestFlight]
+			{
+				testedBurnTime = 1800		//hydrogen engines are pretty durable. We'll give this half an hour
+				ratedBurnTime = 750
+				safeOverburn = true
+				ignitionReliabilityStart = 0.932692
+				ignitionReliabilityEnd = 0.986538
+				ignitionDynPresFailMultiplier = 10.0
+				cycleReliabilityStart = 0.803571
+				cycleReliabilityEnd = 0.960714
+			}
+		}
+	}
+}

GameData/RealismOverhaul/Localization/en-us-Engines.cfg

@@ -1051,6 +1051,9 @@ Localization
 		//		YF40
 		#roYF40Title = YF-40
 		#roYF40Desc = A Chinese hypergolic gas generator vacuum engine, created for the 3rd stage of the Long March 4. Later versions had restart capability.
+		//		YF73
+		#roYF73Title = YF-73
+		#roYF73Desc = The first operational Chinese hydrolox gas generator vacuum engine. Used on the third stage of the Long March 3. Low performance and unreliable, it was replaced by the YF-75 after 13 flights.
 		//		YF75
 		#roYF75Title = YF-75
 		#roYF75Desc = A Chinese hydrolox gas generator vacuum engine, created to replace the YF-73. Used on the third stage of the Long March 3A/B/C. It was converted to expander cycle to create the YF-75D, which is used on the second stage of Long March 5.