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Hi, This is a post in the context of project performance: If you use loops with feature definitions, take care where you declare ("create") your participating objects: Most of the times, objects can be declared outside of the loop since the dependency is kept within the loop by means of the expression mechanism! In the attached example, I create N curves in between of two given rail curves and store them in a list for surface creation. The two points on the corresponding rails are declared right before the loop starts. You could also declare them within the loop but - and here comes the message - they would be created again and again, i.e. at each iteration (N-times). In the end, this might slow down your feature execution when it comes to a higher number of objects that get declared within a loop. Hope this helps ... Cheers Joerg loop.fdb
How to determine a spiral volute casing (turbocharger, pump) cross sectional decrease in value? I am trying to design a volute casing. Problem is, I don't know how much its cross sectional area decreases over time. For instance starting cross sectional area (0 degrees) is 100 cm^2, what will it be when it reaches 45, 90 degrees and so on? Is there any way to calculate it? I am sure that knowing starting and finishing cross sectional areas size (btw I know them) and just connecting them isn't a correct way.