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""" 

Give primary name and alternate names for included propellants. 

 

Examples of vehicles that use specific propellants 

https://www.britannica.com/technology/rocket-jet-propulsion-device-and-vehicle/Liquid-propellant-rocket-engines 

""" 

 

class PropNames: 

def __init__(self): 

"""Hold primary names and associated alternate names.""" 

 

self.primary_nameD = {} # index=primary name, value=set of alternate names 

 

# allow for case mis-matches. 

self.primary_lowerD = {} # index=primary lower case, value=primary 

self.alternate_lowerD = {} # index=alternate lower case, value=primary 

 

def primary_name_list(self): 

"""Return a list of the primary name of all propellants in RockeProps""" 

return list( self.primary_nameD.keys() ) 

 

def alternate_name_list(self, name): 

"""Return a list of all recognized names for the input propellant name.""" 

primary = self.get_primary_name( name ) 

if primary is None: 

return [''] 

else: 

altL = sorted( list(self.primary_nameD[ primary ]), key=str.lower ) 

return altL 

 

def description(self, name): 

"""Return a description for the input propellant name.""" 

primary = self.get_primary_name( name ) 

if primary is None: 

return 'No Description Available' 

else: 

altL = sorted( list(self.primary_nameD[ primary ]), key=str.lower ) 

#altL = ['(%s)'%a for a in altL] 

return '%s == %s'%(primary, ' == '.join(altL) ) 

 

def paren_desc(self, name): 

"""Return a description for the input propellant name.""" 

primary = self.get_primary_name( name ) 

if primary is None: 

return 'No Description Available' 

else: 

altL = sorted( list(self.primary_nameD[ primary ]), key=str.lower ) 

if len(altL) == 0: 

return primary 

else: 

return '%s (%s)'%(primary, ', '.join(altL) ) 

 

def add_primary_name(self, name): 

"""Add a propellant primary name to the RockeProps library.""" 

if name not in self.primary_nameD: 

self.primary_nameD[ name ] = set() 

self.primary_lowerD[ name.lower() ] = name 

else: 

print('WARNING... attempted to duplicate primary name.', name) 

 

def is_primary_name(self, name): 

"""Check if input name is a primary name (allow for case mis-matches)""" 

return name.lower() in self.primary_lowerD 

 

def get_primary_name(self, name): 

"""Get the primary name for the input propellant name.""" 

pname = self.primary_lowerD.get( name.lower(), None ) 

if pname is None: 

pname = self.alternate_lowerD.get( name.lower(), None ) 

return pname 

 

def add_associated_name(self, primary, associated): 

"""Add an associated name for the given primary propellant name.""" 

if associated in self.primary_nameD: 

raise Exception('Attempted to revert %s to an associated name'%associated) 

 

if not primary in self.primary_nameD: 

raise Exception('Attempted to create primary="%s" with associated name="%s"'%(primary, associated) ) 

 

self.primary_nameD[ primary ].add( associated ) 

 

self.alternate_lowerD[ associated.lower() ] = primary 

 

def summ_print(self): 

"""Print a summary of the primary propellant names in RockeProps.""" 

nameL = sorted( list( self.primary_nameD.keys() ), key=str.lower ) 

print('============ Propellant Names ===============') 

for name in nameL: 

print( '%10s -->'%name, self.primary_nameD[name] ) 

 

prop_names = PropNames() 

prop_names.add_primary_name('A50') 

prop_names.add_primary_name('Methane') 

prop_names.add_primary_name('CLF5') 

prop_names.add_primary_name('Ethane') 

prop_names.add_primary_name('Ethanol') 

prop_names.add_primary_name('F2') 

prop_names.add_primary_name('IRFNA') 

prop_names.add_primary_name('LOX') 

#prop_names.add_primary_name('M20') 

prop_names.add_primary_name('Methanol') 

prop_names.add_primary_name('MMH') 

prop_names.add_primary_name('MHF3') 

prop_names.add_primary_name('MON10') 

prop_names.add_primary_name('MON25') 

prop_names.add_primary_name('MON30') 

prop_names.add_primary_name('N2H4') 

prop_names.add_primary_name('N2O') 

prop_names.add_primary_name('N2O4') 

prop_names.add_primary_name('NH3') 

prop_names.add_primary_name('PH2') 

prop_names.add_primary_name('Propane') 

prop_names.add_primary_name('UDMH') 

prop_names.add_primary_name('RP1') 

prop_names.add_primary_name('Water') 

 

prop_names.add_associated_name( 'A50', "50% N2H4 + 50% UDMH" ) 

prop_names.add_associated_name( 'A50', 'Aerozine50' ) 

prop_names.add_associated_name( 'CLF5', "ChlorinePentafluoride" ) 

prop_names.add_associated_name( 'Methane', "CH4" ) 

prop_names.add_associated_name( 'Ethane', "C2H6" ) 

prop_names.add_associated_name( 'Ethanol', "C2H6O" ) 

prop_names.add_associated_name( 'F2', "Fluorine" ) 

prop_names.add_associated_name( 'LOX', "O2(L)" ) 

prop_names.add_associated_name( 'LOX', "Oxygen" ) 

prop_names.add_associated_name( 'Methanol', "CH4O" ) 

 

prop_names.add_associated_name( 'IRFNA', "85% HNO3 + 15% NO2" ) 

 

#prop_names.add_associated_name( 'M20', "20% MMH + 80% N2H4" ) 

 

 

prop_names.add_associated_name( 'MHF3', "MHF-3" ) 

prop_names.add_associated_name( 'MHF3', "86% MMH + 14% N2H4" ) 

prop_names.add_associated_name( 'MHF3', 'MixedHydrazineFuel-3' ) 

 

prop_names.add_associated_name( 'MON10', "90% N2O4 + 10% NO" ) 

prop_names.add_associated_name( 'MON25', "75% N2O4 + 25% NO" ) 

prop_names.add_associated_name( 'MON30', "70% N2O4 + 30% NO" ) 

 

prop_names.add_associated_name( 'N2H4', "Hydrazine" ) 

prop_names.add_associated_name( 'MMH', "MonoMethylHydrazine" ) 

prop_names.add_associated_name('N2O', 'NitrousOxide') 

prop_names.add_associated_name('N2O', 'Dinitrogen Oxide') 

 

prop_names.add_associated_name('N2O4', 'MON-3') 

prop_names.add_associated_name('N2O4', 'MON3') 

prop_names.add_associated_name('NH3', 'Ammonia') 

prop_names.add_associated_name('PH2', 'H2(L)') 

prop_names.add_associated_name('PH2', 'ParaHydrogen') 

prop_names.add_associated_name('PH2', 'Hydrogen') 

prop_names.add_associated_name('Propane', 'C3H8') 

prop_names.add_associated_name('RP1', 'RP-1') 

prop_names.add_associated_name('UDMH', 'UnsymmetricDiMethylHydrazine') 

prop_names.add_associated_name('Water', 'H2O') 

 

 

if __name__ == "__main__": 

 

pn = PropNames() 

pn.add_primary_name('MMH') 

pn.add_primary_name('N2H4') 

 

pn.add_associated_name( 'MMH', 'monomethylhydrazine') 

pn.add_associated_name( 'N2H4', 'hydrazine') 

 

pn.summ_print() 

 

print('Is "mmh" a primary name:', pn.is_primary_name('mmh')) 

 

print('Primary for "Hydrazine" = ', pn.get_primary_name("Hydrazine") )