Chris's Diesbar Engine Build

[Sanjay F]

The csk flat head screws look great! The whole cylinder looks great! 

[crueby]

Thanks  guys! It assembled well, no leaks I  can find and all passages flow. Will know for sure later when high pressure added.


The new elf bot guy is catching on, and with no mouth he doesn't  complain!   

[crueby]

The csk flat head screws look great! The whole cylinder looks great! 

Thanks  Sanjay! The countersinks were done shallow, enough to catch the screw but not enough to let the screw slot show after sanding them off. They disappeared.

[steam guy willy]

coming along great. 

Willy

[crueby]

coming along great. 

Willy

Thanks Willy! 

[crueby]

The lower cylinder drain valve handles/rods were turned up out of some rod stock, the horizontal pieces are screwed into the sides of the cylinder cap and ring, and the handle/rod pieces loctited together. They are dummy valves, at this scale the holes through would be too tiny to be of much practical use. I put larger screws into the bottom of the caps. I still need to do some more cleanup work on the flat passage bars above and below the steam chests.

Got a start on the valve sliders. The parts were sliced off the end of a piece of round bronze bar, taken to thickness on the lathe, squared up on the mill, and am milling the recesses in now.

[Michael S.]

Hi Chris, those cylinders turned out really well. Very nice design!
I think the scale you chose is perfect for the model.

[crueby]

Thanks  Michael,  it's  big enough to do the interesting  details, just small enough to machine on my machines.   

[cnr6400]

 

[Michael S.]

Chris, I’m on vacation for two weeks starting today, and I’ve booked a river cruise on the steamer *Diesbar* for June 13th. I hope I’ll be able to take a closer look at the engine. I actually took a trip on that steamer once before, over 25 years ago.

Best regards, Michael 

[crueby]

Chris, I’m on vacation for two weeks starting today, and I’ve booked a river cruise on the steamer *Diesbar* for June 13th. I hope I’ll be able to take a closer look at the engine. I actually took a trip on that steamer once before, over 25 years ago.

Best regards, Michael 

Have a great time!  Maybe measure the steering engine while you are there...   

[Sanjay F]

Chris, I’m on vacation for two weeks starting today, and I’ve booked a river cruise on the steamer *Diesbar* for June 13th. I hope I’ll be able to take a closer look at the engine. I actually took a trip on that steamer once before, over 25 years ago.

Best regards, Michael 

2 weeks vacation, I'm jealous, I could do with that!  Enjoy the time off and the trip and I'm sure there'll be some workshop activity too?

[crueby]

On the original engine, the valve slider is sprung against the outside of the cover, one reason is to keep it against the valve face when the cylinder rocks and the valve face goes past vertical. Its spring bolts to the top/middle of the cover to keep it in place, and to give the tension some adjustability. For the model, the available space makes that impractical, so I cut/bent up some sheet spring stock left over from clock pendulum work and laid that into the cover under the valve rod.

and with the valve set in place:

and the cover attached to the steam chest

The upper end of the valve rod will be supported by a brace coming out from the cylinder cap. Midway up, there will be a crossbar that will engage with flanges on the valve arm. All that will be made next...

[cnr6400]

  With all the valve related work, be careful that a case of valvitis doesn't set in! 

Looking great Chris!

[crueby]

With all the valve related work, be careful that a case of valvitis doesn't set in! 

Looking great Chris!

A coat of Valvoline might help that...