Pacific Vapor Engine from Morrison & Marvin Castings

[Jasonb]

Nice bit of plumbing Dave and I like the tundish (funnel) should come in useful to see how much water is flowing through the engine.

J

[Tennessee Whiskey]

Stunning, museum quality, and I could go on and on. Builds like this are what should give us mere mortals something to strive for. Can't wait to hear it chooch.

Cletus

[Dave Otto]

Hi guys,
I wanted to take a minute to tell everyone thanks for all the very nice comments and also for continuing to follow along with my long drawn out project.

Interesting term Jason, I learned something new.

Hopefully it won't be tool long before I can post a video of the first pops and splashes.


Thanks again guys,
Dave

[kvom]

First astragal now tundish.  Jason's words of the month.   

[Don1966]

Damn Dave true art at it's finest buddy! You know .....i..........like..........


 
Don

[jeff l]

a work of art for sure.

[Dave Otto]

Thanks Don & Jeff
Much appreciated.


Dave

[Roger B]

Beautiful    The tools in the background show just how big (and probably heavy) it is 

[Dave Otto]

Thanks Roger,

I can still lift it, but it is a handful.


Dave

[rklopp]

Dave,

Your work is very inspiring. I can only hope to aim for that level of quality.

Regards,

RKlopp

[Dave Otto]

Thanks for the kind words rklopp, a little belated sorry.

Hi guys, wow where does the time go? I haven’t posted anything on my projects since February, I have been busy with other project and more than the usual customer jobs this year. I’m still hoping to get this project finished up by springtime.
Not that I haven’t been in this shop (I am most everyday) I just haven’t been able to spend any time on the Pacific.

I only have a couple outstanding items to finish up before I can take it down for paint and some brown stuff. One of these items is the belt pulley, the engine doesn’t really need a belt, pulley but with the crank shaft sticking out there it was just begging for one. I couldn’t find any suitable castings for one so I decided to just make one from scratch.

I liked the size of the Mery pulley but I really wanted a six spoke pulley, the Mery pulley only has five spokes.
The center was made from a slice of 6”cast iron round bar and the rim from a piece of 5” Sch. 40 pipe.


Here the first side of the center is turned.


Then flipped around and the other side turned. The hole for the crank shaft is drilled under sized and will be bored to fit after the pulley is assembled.


The pipe is bored for a.005” to .006” interference fit, the width is left a little long so that it can be squared up after assembly.


Using soft jaws to hold the center the spokes are machined.


All the spokes have been machined and ready for some fillets.


Using a 3/16” ball end mill and a Z Level Finish tool path, the fillets were machined on both sides.


Here are the parts ready for assembly.


The center is taking a swim in liquid nitrogen; the all thread was added for use as handle.


The rim was heated to 400 degrees f using a rose bud and checked with a temp stick. The bronze spacer was machined to keep the center in the middle and square. Heating the rim only probably would have worked but using the LN2 gave me an extra .02” of wiggle room. The center dropped right in.


I was very happy with the results everything ran nice and true, within a thou or two.


Once brought to proper width the outside was turned to size and the crown added. Using my CAD software I created a step and cut chart to cut the crown. Working from the center out, each side was roughed out. In this picture the finish work has been started.


After the lathe work was completed the tapered key-way was put in using the same tapered bushing and broach that was used on the flywheel. I didn’t take any pictures but a proper Gib head key was also made.


Here is the pulley installed on the engine, I’m quite pleased with how it turned out. When the finish work is done it will get a small fillet where the rim meets the center, using some sort of filler.

Well hopefully it isn’t another nine months before the next update.
Thanks for checking in.
Dave

[b.lindsey]

That looks beautiful Dave. The whole engine does in fact. Thanks for the update no matter how long it has been.

Bill

[Kim]

Wow Dave, that really looks nice.
You always seem to have a way to make things look so easy...  Just do this, and that, and bingo, just like that, its done!  I learn a lot by reading your posts.
Thank you for sharing!
Kim

[kvom]

Where/how did you get the liquid nitrogen?  I was thinking of using dry ice for a similar shrink fit.

[Dave Otto]

Guys, thanks for checking in, and the nice comments I appreciate it.

Kirk we have LN2 at work so I just took my parts there to do the assembly; have you checked with your local gas supplier to see if you could beg/buy a small quantity?

Dave