Thumper---A new 1 3/8" bore i.c. engine

[brian Rupnow]

Cylinder from 2 1/2" diameter cast iron. When you buy it, it comes in about 0.100" oversize.

[brian Rupnow]

I am going to end this thread off at this point, and begin a new thread dealing with the fabrication of the engine under the heading of "Thumper--A...

[brian Rupnow]

I have developed the concept and plans for this engine over the last couple of days, under a thread titled "A different engine configuration"....

[brian Rupnow]

The rpm and powerband is largely determined by the shape of the cams. If I had to depend on a back up engine to run my generator in an emergency, the...

[brian Rupnow]

I managed to get the intake and exhaust all in place, although I thought I might have to make the flywheels a bit smaller in diameter that I had planned....

[brian Rupnow]

That is one of the engines I sold plans for. I don't know quite what I feel about this. A bit P.O.'d that someone I sold the plans to would send them...

[brian Rupnow]

Idle will be about 900 to 1100 rpm. Power band will be achieved at 2500 to 3000 rpm.

[brian Rupnow]

Well, I'm pretty excited about how this is turning out. Everything seems to fall into place without any major problems. I have to add in the carburetor...

[brian Rupnow]

Sid---I was lead to believe that it's one guy knocking it off. I would like to know more. It is such an interesting engine that if somebody in china has...

[brian Rupnow]

Hey--Check this out. Somebody just sent me a picture/model of a new engine being built in China.--Does it look familiar to anybody?...

[brian Rupnow]

Tom S--The opposed piston engine was one of my own design that I built and ran many rears ago. Here are a picture and a link to the build.
http...

[brian Rupnow]

Yes, the builds are on this forum. However, I've posted so many builds that I don't remember where they all are. Not all of them have a link to a video,...

[brian Rupnow]

I've got some very interesting stuff going on here today. I have everything sussed out but the cylinder head. I'm going to stretch my own boundaries here...

[brian Rupnow]

Paul---Every engine I have built since 2008 has been fully documented with write up, still pictures, and video links on this forum.

[brian Rupnow]

Paul--I'm curious. Do you have a lathe and a mill?---Brian

[brian Rupnow]

Micky f--i could do that. I also have about 12 steam engines which run, about half being designed by others and half designed by myself. When I worked...

[brian Rupnow]

I spent a goodly portion of today watching TIG welding "how to" videos on Youtube. All of the major welding machine manufacturers have good...

[brian Rupnow]

I have a few new things going on. Biggest new thing is that I just bought a tig welder. A tig welder will let me fabricate vaned flywheels. If I take...

[brian Rupnow]

Thank you. I can see that there are going to be a hundred new things to learn---and I like that. I love learning new things.---Brian

[brian Rupnow]

See post #11....