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My first stem engine build

Brian H

Brian H

Super User
I started this little wobble engine on Jan. 1. I was really excited to have it run the first attempt.
 

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Yes it was a scratch build. I used bits and pieces I was able to scrounge up. I would have liked to use more brass but I don't have access to anything big enough for this project.
I got the plans from Ade Swash on YouTube. He has several versions of this.
 
Excellent job particularly for a first build. I love wobblers they are fun to build and rewarding to watch them do their thing.
 
I'm not sure if I understand the question. If you are asking how I figured where the port holes went, I blued the face of the frame, placed a pin in the hole and swept the cylinder on the pivot to mark the extremes
 
You understood my question perfectly, unfortunately No I cannot explain it, I did the “cheat way” myself and was hopeful Brian May have been able to break down the math if he had successfully figured it out
 
Nice job. The Wobbler design seems popular on the engine forum.
Even plans for a radial!

About how much pressure is required to get it ticking over?
 

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PeterT said:
Nice job. The Wobbler design seems popular on the engine forum.
Even plans for a radial!

About how much pressure is required to get it ticking over?
Click to expand...

The pressure gauge on my regulator only goes down to 10 PSI. But, I turn it right off and then slowly turn it in about two turns. Im guessing 1.5-2 PSI.

I like the radial idea. I may just attempt one of those.
 
Bofobo said:
You understood my question perfectly, unfortunately No I cannot explain it, I did the “cheat way” myself and was hopeful Brian May have been able to break down the math if he had successfully figured it out
Click to expand...
If you look at the plans Ade Swash has on his Youtube video, the numbers are all ther, however, I didn't trust myself that I got everything accurate enough to use them so I "cheated" so it was right. I hate making parts twice...LOL
 
I'll try load a video....sorry, I can't get it to work for me.
Has any one downloaded a video? I'm getting an error message "does not have an allowable extension"
 
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