def browse_airfoils(self):
""" Allows the user to easily choose amongst available airfoils with a GUI File-Browser.
:return: Sets the inputs `airfoil_type` and `airfoil_choice` above to the value chosen in the GUI Browser
"""
root = Tk()
root.withdraw()
path = tkFileDialog.askopenfilename(initialdir=DIRS['AIRFOIL_DIR'],
title="Select Airfoil",
filetypes=(("Airfoil Data Files",
"*.dat"), ("All Files",
"*.*")))
root.destroy()
valid_dir = DIRS['AIRFOIL_DIR'].replace('\\', '/')
if path.find(valid_dir) is -1:
error_window(
"Custom airfoils must be placed in the pre-allocated directory"
)
return 'Airfoil selection failed, please invalidate and run-again'
else:
if len(path) > 0:
self.set_slot_value('airfoil_choice',
str(path.split('.')[-2].split('/')[-1]))
self.set_slot_value('airfoil_type',
str(path.split('.')[-2].split('/')[-2]))
return 'Airfoil has been successfully chosen, invalidate to run-again'
def lift_coef_validator(self):
""" Validator for the compartment_type """
if isinstance(self.aspect_ratio_range, list):
for _coef in self.maximum_lift_coefficient:
if _coef < 1 and self.handlaunch:
error_window('C_L=%d is too low and will result in either too large of a wing surface, or too'
'high of a launch speed to hand launch. Consider increasing' % _coef)
elif _coef > 1.7:
error_window('C_L=%d This lift coefficient is very difficult to produce without high lift '
'devices at Low Reynolds numbers decreasing' % _coef)
else:
raise TypeError('The provided input into :param:`maximum_lift_coefficient` is not valid')
def aspect_validator(self):
""" Validator for the compartment_type """
if isinstance(self.aspect_ratio_range, list):
for _ratio in self.aspect_ratio_range:
if _ratio < 10:
error_window('AR=%d will result in too of an low aspect ratio and thus high induced drag, '
'consider increasing' % _ratio)
elif _ratio > 20:
error_window('AR=%d will result in too high of anaspect ratio and thus high structural loads '
'due to increased wing bending moments, consider decreasing' % _ratio)
else:
raise TypeError('The provided input into :param:`aspect_ratio` is not valid')
def weight_checker(self):
""" Validates the user-input weight to make sure it is within the bounds of the project and the region with
the highest confidence interval for Class I """
if self.weight_target is 'payload':
if self.target_value > 5.0:
error_window(
'The provided payload target exceeds the scope of this project (only light UAVs < 20 '
'[kg] represent the design space')
else:
if self.target_value < 1.0 or self.target_value > 20.0:
error_window(
'The provided MTOW exceeds the scope of this project (only light UAVs < 20 [kg] '
'represent the design space')
return None