def defaultPropellants():
cl = motorlib.propellant()
cl.setProperties(clProps)
ow = motorlib.propellant()
ow.setProperties({'name': 'Ocean Water', 'density': 1650, 'a': 1.467e-05, 'n': 0.382, 't': 3500, 'm': 23.67, 'k': 1.25})
return [cl, ow]
def loadPropellants(self):
try:
propList = loadFile(getConfigPath() + 'propellants.yaml', fileTypes.PROPELLANTS)
for propDict in propList:
newProp = propellant()
newProp.setProperties(propDict)
self.propellants.append(newProp)
except FileNotFoundError:
self.propellants = defaultPropellants()
self.savePropellants()
def loadProperties(self, collection): # Override for ballisitc coefficient units
props = collection.getProperties()
# Convert the ballistic coefficient based on the exponent
ballisticCoeffUnit = self.preferences.getUnit('m/(s*Pa^n)')
if ballisticCoeffUnit == 'in/(s*psi^n)':
props['a'] /= 1/(6895**props['n'])
# Create a new propellant instance using the new A
newProp = propellant()
newProp.setProperties(props)
super().loadProperties(newProp)
self.labelCStar.show()
def newPropellant(self):
propName = "New Propellant"
if propName in self.manager.getNames():
propNumber = 1
while propName + " " + str(propNumber) in self.manager.getNames():
propNumber += 1
propName = propName + " " + str(propNumber)
np = propellant()
np.setProperties({'name': propName, 'density': 1680, 'a': 3.517054143255937e-05, 'n': 0.3273, 't': 2800, 'm': 23.67, 'k': 1.21})
self.manager.propellants.append(np)
self.setupPropList()
self.setupButtons()
self.manager.savePropellants()
def importFile(self, path):
motor = motorlib.motor()
tree = ET.parse(path)
root = tree.getroot()
errors = ''
propSet = False
for child in root:
if child.tag == 'Nozzle':
motor.nozzle.setProperty('throat',
inToM(child.attrib['ThroatDia']))
motor.nozzle.setProperty('exit',
inToM(child.attrib['ExitDia']))
motor.nozzle.setProperty(
'efficiency',
float(child.attrib['NozzleEfficiency']) / 100)
if child.tag == 'Grain':
if child.attrib['Type'] in supportedGrainTable:
motor.grains.append(
supportedGrainTable[child.attrib['Type']]())
motor.grains[-1].setProperty(
'diameter', inToM(child.attrib['Diameter']))
motor.grains[-1].setProperty('length',
inToM(child.attrib['Length']))
grainType = child.attrib['Type']
if child.attrib['EndsInhibited'] == '1':
motor.grains[-1].setProperty('inhibitedEnds', 'Top')
elif child.attrib['EndsInhibited'] == '2':
motor.grains[-1].setProperty('inhibitedEnds', 'Both')
if grainType in ('1', '3',
'7'): # Grains with core diameter
motor.grains[-1].setProperty(
'coreDiameter',
inToM(child.attrib['CoreDiameter']))
if grainType == '2': # D grain specific properties
motor.grains[-1].setProperty(
'slotOffset', inToM(child.attrib['EdgeOffset']))
elif grainType == '3': # Moonburner specific properties
motor.grains[-1].setProperty(
'coreOffset', inToM(child.attrib['CoreOffset']))
elif grainType == '5': # C grain specific properties
motor.grains[-1].setProperty(
'slotWidth', inToM(child.attrib['SlotWidth']))
radius = motor.grains[-1].getProperty('diameter') / 2
motor.grains[-1].setProperty(
'slotOffset',
radius - inToM(child.attrib['SlotDepth']))
elif grainType == '6': # X core specific properties
motor.grains[-1].setProperty(
'slotWidth', inToM(child.attrib['SlotWidth']))
motor.grains[-1].setProperty(
'slotLength',
inToM(child.attrib['CoreDiameter']) / 2)
elif grainType == '7': # Finocyl specific properties
motor.grains[-1].setProperty(
'finWidth', inToM(child.attrib['FinWidth']))
motor.grains[-1].setProperty(
'finLength', inToM(child.attrib['FinLength']))
motor.grains[-1].setProperty(
'numFins', int(child.attrib['FinCount']))
if not propSet: # Use propellant numbers from the forward grain
impProp = child.find('Propellant')
propellant = motorlib.propellant()
propellant.setProperty('name', impProp.attrib['Name'])
n = float(impProp.attrib['BallisticN'])
a = float(impProp.attrib['BallisticA']) * 1 / (6895**n)
propellant.setProperty('n', n)
propellant.setProperty(
'a',
motorlib.convert(a, 'in/(s*psi^n)', 'm/(s*Pa^n)')
) # Conversion only does in/s to m/s, the rest is handled above
propellant.setProperty(
'density',
motorlib.convert(float(impProp.attrib['Density']),
'lb/in^3', 'kg/m^3'))
propellant.setProperty(
'k', float(impProp.attrib['SpecificHeatRatio']))
impMolarMass = impProp.attrib['MolarMass']
if impMolarMass == '0':
propellant.setProperty(
'm', 23.67
) # If the user has entered 0, override it to match the default propellant.
else:
propellant.setProperty('m', float(impMolarMass))
propellant.setProperty(
't', 3500
) # Burnsim doesn't provide this property. Set it to match the default propellant.
motor.propellant = propellant
propSet = True
else:
if child.attrib['Type'] in unsupportedGrainTable:
errors += "File contains a " + unsupportedGrainTable[
child.attrib[
'Type']] + " grain, which can't be imported.\n"
else:
errors += "File contains an unknown grain of type " + child.attrib[
'Type'] + '.\n'
if child.tag == 'TestData':
errors += "\nFile contains test data, which is not imported."
if errors != '':
self.showWarning(errors +
'\nThe rest of the motor will be imported.')
self.fileManager.startFromMotor(motor)
return True