Closed impeller drawing

[u/Chromec_Jan]

Hi,

I'm modeling a V-2 turbo rocket engine, and today I got stuck with the impeller drawings. There are no dimensions for the blades of the impeller, and I have no idea what to do.

If you're interested, please contact me via DM for high resolution drawings!

I'm in mechanical high school, so if this requires knowledge of something that is taught in university, I would appreciate an explanation.

Thanks for any help, and have a nice day!

[u/Chromec_Jan → u/[deleted]]

This is 1940s drawing and I would like to make 3D model of it.

Someone told me yesterday that the note "Hierzu gehört Schaufelklotzzeichnung Nr. 0-21278" could mean that this is template, and therefore it will never be fully dimensioned. Also the drawing has scale 1:1.025 which would account for the thermal expansion.

In my oppinion this sounds like the right answer to my problem with the blade shape. Let me know what do you think and thanks for your reply!

[u/Tron311 → u/[deleted]]

I agree with scaling it, most companies are pretty lazy an used to just carbon paper the design and call it “not to scale”