Another Steam Engine

[Dave R]

Here's another one in progress.



This is based on dimensions in an article from a magazine published in January 1924. Many of the larger parts were available as castings and only the dimensions for machining them are included in the article. That required a forensic approach to modeling it. As an example the diameters of the cylinders weren't given so they had to be determined from the piston diameters.

[tuna1957]

Sweet

[Bryan K]

Wow! Fantastic detail!

[Mike Amos]

Cooking on gas.

[Dave R]

Thank you folks and HNY.

[Bryan K]

Excellent as always!

[Dave R]

This is a little Stirling engine. The flywheel is 49mm in diameter.

[Bryan K]

Very cool.

[Mike Amos]

Another cracking piece you have there.

[ely862me]

Fantastic! Indeed some of these would deserve to be printed and hanged in some industrial based interior designs!

[Mike Amos]

Dave, you could make some decent money selling these as card/paper models. Flattery etc can help but check out https://www.papermodelers.com/forum/railway-related-builds/ , the railway type would seem closest to your steam engines.

[bexar]

Dave,

Very nice work, I am very impressed. I have been "modeling" for a short time and now would like to dip my toe into steam engine "animation". I saw your video of the Muncaster "automation". Another "home run".

I have tinkered with MS Physics a bit, I really haven't got my head wrapped around the tool' methodology. I was wondering which animation tool did you used on the Muncaster (Ms Physics, Animator, Key Frame or other)??

Again, nice work on all of your models.

bexar
Southeast Queensland

[Dave R]

@bexar thank you.

My animations of the various steam engine models were done without using any "animation tools". I just use copies of components, tag visibility, scenes, and the native animation export option straight out of SketchUp. For me that's straightforward and simple.

[bexar]

WOW! Can you direct me to resources (youtube, pdf, etc) that explains that process that you use? Now, I'm even more impressed by your skill set!!! Have a good day!!

[Dave R]

Thanks! There's really not a lot to it. I make multiple copies of the components along their route of travel. There's a different tag applied to each of the copies and then a different one of those tags is visible for each scene. This screen shot shows a simpler engine model with four of the 24 tags turned on. There are 24 scenes for the animation.

It gets a little more complicated with an engine like the horizontal Muncaster because of the steam valve and the linkages.

Here's the resulting animation:
https://flic.kr/p/2n7xvyh

[bexar]

Thank you so much for that information. I'll certainly do a bit of self-education. The animation was just so smooth! Thank you so much for your helpful reply!

[Dave R]

@bexar you're welcome.

FWIW these engine animations are exported with no transitions between scenes so there are only as many frames as scenes. Then in a video editor I just copy and paste the animation to create a repeating sequence.

[Dave R]

[Rich O Brien]

Clean modelling. You going to 3D print these?

[Dave R]

@Rich-O-Brien thank you. I don't know. It hink I'd be disappointed in the results.