My first stem engine build

[Brian H]

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

 

[YYCHM]

Did you scratch build that? What materials did you use? Looks great!

 

[Brian H]

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.

 

[CalgaryPT]

Excellent work Brian. Thanks for the pics.

 

[DPittman]

Excellent job particularly for a first build. I love wobblers they are fun to build and rewarding to watch them do their thing.

 

[Bofobo]

Very nice! Did you do the work around for the port holes or the maths way?

 

[Brian H]

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

 

[DPittman]

I've never quite understood the "math" way Bofobo...can you explain that?

 

[Bofobo]

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

 

[PeterT]

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?

 

[Brian H]

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?

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.

 

[Brian H]

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

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

 

[Marc Moreau]

Very nice job how many hours ?

 

[Marc Moreau]

Did the engine running ? if yes could you make a video ? would be nice.

 

[CalgaryPT]

Did the engine running ? if yes could you make a video ? would be nice.

What Marc said...ditto But something that cool needs video

 

[Brian H]

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"

 

[Brian H]

Very nice job how many hours ?

I didn't keep accurate track,but, about 30-40 hours

 

[CalgaryPT]

Need to post to YouTube or Google Drive and paste the link here. Then it will work.

 

[Brian H]

Did the engine running ? if yes could you make a video ? would be nice.

I've tried to load a video but I'm not computer literate enough to make it work. I'll keep trying tho

 

[Brian H]

Here is the link for the youtube video. Hopefully I did it right and you can watch it