Vertical hit and miss engine

[Brian Rupnow]

I've got  a great big nasty parting blade 1/8" wide for the main "hogging" of material. I have ground from HSS a left hand cutting tool and a right hand cutting tool to clean up the inside corners. I will post a picture of them if you want.---Brian

[Jasonb]

What kind of tool do you use to get square corners on the center throw? I always have a problem with leaving a fillet in one or both corners or having a step in the journal if I change tools to RH or LH.

I would say that is an advantage, you don't want tight internal corners as they are stress risers, I always leave a small fillet and turn a CSK on the bearings and big end to clear it.

[mike mott]

I would say that is an advantage, you don't want tight internal corners as they are stress risers, I always leave a small fillet and turn a CSK on the bearings and big end to clear it.

That makes a lot of sense.


Mike

[Brian Rupnow]

Today was major assembly and gasket day. Everything was calculated to have the outside to outside measurement of the crankshaft hubs to match the inside dimensions of the side-plates and bearings, with the cylinder being exactly in the center.  It was close---really close, but no cigar. However, I knew that by the time I put a 0.030" gasket between the side-plates and center section, that it would free up a bit of room. It did, everything cleared and went round and round. I was afraid that I was going to break the cast iron rings when trying to put them on the piston. 10w30 oil saved the day, and I got them on VERY carefully. Then came the question of how in heck do I compress the rings so I can get the piston into the cylinder. This lead to dismounting the cylinder, putting it up in the lathe, and turning a 30 degree internal chamfer on the end which sets closest to the engine. That worked, as with a good deal of butt-clenching I tapped the piston with rings mounted on it into the cylinder  (again with lots of 10w30 oil. So--Engine is assembled and everything clears when I turn it over by hand. All I have left to do on the engine is to make the counterweights which mount on the crankshaft.

[Brian Rupnow]

Yesterday evening I filled the crank-case with oil, made certain that the crankshaft would rotate a full 360 degrees, then took the engine out to my run-in bench. With a 2.5" pulley on my electric motor and a 6" pulley on the engine shaft, I connected the two with a v-belt and let things "run in" for 20 minutes. The engine is turning at about 800 rpm. Some people agree with this "run in" period, some disagree.  I always run my engines in for a period of time to free everything up before trying to start the engine. This run in time MAY help the rings to seat. It will certainly take the high spots down.

[Brian Rupnow]

After a successful half hour run in, the engine was completely torn down this morning so I can mount the counterweights to the crankshaft. If you wanted a look inside, here it is.

[Brian Rupnow]

Took one of my grandkids and went to the steampunk fair in Coldwater today. A great day, ice cream was eaten, soft drinks were drank. Very few steam engines (I seen one) but lots of weird and wonderful creations and many people both young and old dressed in what they considered "period costumes" .  Steampunk is far more about fantasy that any reality that ever existed, but I love it. Bren's day was made when I bought him a fancy hat. I tried to buy one for myself in black, but the guy didn't have anything big enough to fit my fat old head, so I custom ordered one "to be built". I gave the guy $10 and a business card. I may never hear from him again, but probably will. It was a great, fun day.

[mike mott]

What a great treat for your grandson Brian.

Mike

[Brian Rupnow]

Okay, I admit it. I had to do a little work today. I made these brass crankshaft counterweights this morning before I picked Bren up to go to the fair.

[Brian Rupnow]

The engine has been completely reassembled, with gaskets between the side-plates and the main body, between the cylinder and the main body, and a head gasket. All clearances have been checked. I will let the engine "run in" with all its components in place for about 20 minutes before setting the valve and ignition timing. I have to buy a set of points and a condenser tomorrow, and after they are installed, we should be ready to go.
<a href="https://www.youtube.com/watch?v=JGzUZFFGO_M" target="_blank">http://www.youtube.com/watch?v=JGzUZFFGO_M</a>

[Roger B]

Awaiting the first pops and hopefully first run     

[Art K]

Brian,
That thing is looking good. It won't be long now before your first run. Sorry I've been very busy, out of town yesterday went to see a friend speak, also I've  been working on my Upshur engine in hope's of having it running for next weekend's Badger Steam & Gas show. Don't think it's gonna happen.
Art

[Brian Rupnow]

Laying in bed last night, going over the starting procedures for this new engine, I suddenly thought "Oh my God-I may have created a monster!!" I thought I was being very clever by hiding the points and ignition cam in behind the flywheel. Bingo!! How do I adjust the position of the ignition cam to time this thing. This morning I opened the 3D cad model, and breathed a sigh of relief.--One of the grub screws in the ignition cam is accessible from the side, even with the flywheel in place. That means I can set the ignition timing, and when the engine runs satisfactorily, I can loosen the flywheel grubscrew, slide the flywheel back a bit on the shaft, tighten the second ignition cam grubscrew, then slide the flywheel back into place.

[Brian Rupnow]

I didn't feel like "builder bear" today, so I went to Part Source and picked up my ignition points and condenser. I have never taken the time before to model a condenser, so when I built the engines I just mounted the condenser wherever I could find room for it. I took half an hour and modelled it, so I can put it into my engine models from now on. I have had the Dodge ignition points and the NGK  CM6 sparkplug modelled for years now.

[Brian Rupnow]

Forgot my starter hub. This one will be a little different. I made the part this afternoon from steel. You will also notice that I changed the orientation of the condenser.--This way makes the wire lead lay flatter so it isn't rubbed by the flywheel.