Newbie question. How do I scale an object in Y and not X.

chris_dalby

I have an airfoil section made up of 2 multi point splines. I want to change the % thickness of the tip airfoil. I cannot seem to find any reference to scale or resize that allows scaling of one axis and not another.

I know it's going to be a simple, starring me in the face, answer BUT..................

https://cad.onshape.com/documents/b5af05b5e59da6a48c2ff20d/w/dd3c994e215c5194c71b3989/e/ccb8884f22a2e0343c2c99a7

ilya_baran

Here is a (FeatureScript) custom feature that will allow you to do a non-uniform scale.  Just select the part to scale, the point to scale about and the scale numbers for x y and z.
https://cad.onshape.com/documents/ccbbbcd87f9c80f9650af745/v/d3f3849203d96becc718a958/e/634ccf554fae91db941806f5
See https://www.onshape.com/featurescript#start for a quick intro of how to use custom features.

philip_thomas

Chris - sorry, today parts and sketches may only be scaled uniformly. That said, please submit an enhancement request for non-uniform scaling. 
Next, how are you generating the profiles?
if you are using one of the public custom features for reading in Csv data, you could scale the data or apply a factor in the custom feature. If you are using a custom feature to generate the sections, you could expand apon the code to generate the sections in any way that pleases you. 
I hope this helps. 

philip_thomas

Search in public docs for 'Foils' by BobT (Tipton). 
He is one of the two aeronautical engineers that work at Onshape (I am the other one )

ilya_baran

Here is a (FeatureScript) custom feature that will allow you to do a non-uniform scale.  Just select the part to scale, the point to scale about and the scale numbers for x y and z.
https://cad.onshape.com/documents/ccbbbcd87f9c80f9650af745/v/d3f3849203d96becc718a958/e/634ccf554fae91db941806f5
See https://www.onshape.com/featurescript#start for a quick intro of how to use custom features.

chris_dalby

philip_thomas said:

Search in public docs for 'Foils' by BobT (Tipton). 
He is one of the two aeronautical engineers that work at Onshape (I am the other one )

Handy feature, thanks.

chris_dalby

ilya_baran said:

Here is a (FeatureScript) custom feature that will allow you to do a non-uniform scale.  Just select the part to scale, the point to scale about and the scale numbers for x y and z.
https://cad.onshape.com/documents/ccbbbcd87f9c80f9650af745/v/d3f3849203d96becc718a958/e/634ccf554fae91db941806f5
See https://www.onshape.com/featurescript#start for a quick intro of how to use custom features.

Great, thanks.

David_Bone

Great feature script, but should be part of the base transform feature!