ChrisB builds the EJS Wobbler

ChrisB · Dec 21, 2011

Hi all,

I was packing this engine tonight and took a couple of pictures and thought I would share with you all. This is a Christmas gift to my father, who is really the reason why I am an engineer in the first place. It is the EJS double acting wobbler, and is my second completed engine. It runs very nicely, registering just above zero psi (so I would suspect around 5 or so) on my little compressor gauge. I do not have any video of it running, but I build two side by side so I may take some of the other one, it's not as polished though. All constructive criticism very appreciated, always looking to learn.

PS. Is the picture size OK or should I make them smaller in the future?

lazylathe · Dec 21, 2011

th_confused0052WOW th_confused0052

That is awesome!!!
I am sure your father is going to love it!!!

A short video of the one you have would be great!

I like the bigger picture size!
Easier to take in all the details!

Andrew

chucketn · Dec 21, 2011

The picture is just great. So's the engine, it's a beaut! Your Dad will be pleased!

Where did you get the plans? I know I've seen the profile of the standard before, but can't fine it.

Chuck in E. TN

ChrisB · Dec 21, 2011

Thanks for the kind comments guys.

Chuck, the plans are by Erik-Jan Stroetinga, I got them from here http://www.astronomiainumbria.org/advanced_internet_files/meccanica/easyweb.easynet.co.uk/_chrish/plans.htm not sure if there are posted there with permission though. The plans are in metric, not sure if that is going to cause you a problem.

I did not stick 100% to the plans on the flywheel, as I wanted something simpler, and frankly I was not too sure how to cut the rebate at the time. ;D

chucketn · Dec 21, 2011

Thanks, Chris. I did have them, buried in the piles of notes and plans on my desk. I've been seeking out, saving, and printing what ever simple engine plans as I can find in preparation for my retirement. I have started on Elmer's #25, and the EJS is next.

Chuck in E. TN