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Jack B

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Discussion starter · #1 ·
Hello My Friends
In my introduction back in March I mentioned that I had purchased a coal burning Forney. I have since ran it at the Los Angeles Live Steam Spring Meet. It had never been run before and I was greatly impressed by how well the little tea kettle ran. A battery powered fan was used for draft. Some crushed and screened charcoal that had been soaked in lamp oil was used to get things going. Then Welsh coal was added . The fire took right off and the little engine was run for about two hours. Clinkers in the fire box eventually brought the fun to an end. Here is a snappy of an old Bozo (yours truly), stoking the fire.
One thing that I have found to be helpful when burning coal is to screen it. Here is a selection of screens. The screen, or mesh if you like, was bought from McMaster Carr. They seem it in 12" x 12" squares. The wooden boxes were made from pine lumber.
This screening does two things. It removes the dust, and by using one screen, and then another it sizes the coal. For instance the coal that seemed to work best in the fire box of the little Forney was 3/8"-1/4". Which means that the coal went through a 3/8" mesh screen, but not 1/4".
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Here is an assortment of screens.
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Here is some screened coal. I think this was the 3/8"x1/4" coal. This is all Welsh coal which seems to be the best of the best. If you are running small locomotives it's well worth the cost if you can lay your hands on some.
Image

Here is an assortment of screened coal. The coal on the far right is 1/2"x3/8" and is used for larger locomotives. The little Forney is an absolute hoot to run. It's a very well behaved and simple engine without a lot of things to go wrong. One of the main aspects of running steam successfully is how you service the engine after shut down. Blowing all the water out of the engine is important. Drying the out cylinders and boiler. And also of great importance is to flush the water out of the axle and hand pump. Compressed air is used for this. It doesn't take much to make those tiny check valves to go crook. So getting all the water out is important. Then getting some oil into the cylinders is a good thing. For this Marvel Mystery oil is good as it doesn't dry out or become gummy. I have been using this oil for laying up steam locomotives for ages.
Image

I am looking forward to taking the little Forney to the Fall Meet at LALS. I hope to see some of you there.
Happy Steaming
Jack
 
Hello My Friends
In my introduction back in March I mentioned that I had purchased a coal burning Forney. I have since ran it at the Los Angeles Live Steam Spring Meet. It had never been run before and I was greatly impressed by how well the little tea kettle ran. A battery powered fan was used for draft. Some crushed and screened charcoal that had been soaked in lamp oil was used to get things going. Then Welsh coal was added . The fire took right off and the little engine was run for about two hours. Clinkers in the fire box eventually brought the fun to an end. Here is a snappy of an old Bozo (yours truly), stoking the fire.
One thing that I have found to be helpful when burning coal is to screen it. Here is a selection of screens. The screen, or mesh if you like, was bought from McMaster Carr. They seem it in 12" x 12" squares. The wooden boxes were made from pine lumber.
This screening does two things. It removes the dust, and by using one screen, and then another it sizes the coal. For instance the coal that seemed to work best in the fire box of the little Forney was 3/8"-1/4". Which means that the coal went through a 3/8" mesh screen, but not 1/4".
View attachment 66582



Here is an assortment of screens.
View attachment 66581
Here is some screened coal. I think this was the 3/8"x1/4" coal. This is all Welsh coal which seems to be the best of the best. If you are running small locomotives it's well worth the cost if you can lay your hands on some.
View attachment 66583
Here is an assortment of screened coal. The coal on the far right is 1/2"x3/8" and is used for larger locomotives. The little Forney is an absolute hoot to run. It's a very well behaved and simple engine without a lot of things to go wrong. One of the main aspects of running steam successfully is how you service the engine after shut down. Blowing all the water out of the engine is important. Drying the out cylinders and boiler. And also of great importance is to flush the water out of the axle and hand pump. Compressed air is used for this. It doesn't take much to make those tiny check valves to go crook. So getting all the water out is important. Then getting some oil into the cylinders is a good thing. For this Marvel Mystery oil is good as it doesn't dry out or become gummy. I have been using this oil for laying up steam locomotives for ages.
View attachment 66584
I am looking forward to taking the little Forney to the Fall Meet at LALS. I hope to see some of you there.
Happy Steaming
Jack
Hey Jack! Glad you scored that little Forney, because I was sorely tempted! Coal firing tiny engines is great fun and a bit of a sport. Not sure of the date(s) but if I'm in the clear I may try and come out for a bit on Saturday...I have a small 3.5" tank engine I want to try out.. ;)
 
Discussion starter · #5 ·
Hello My Friends
I am looking forward to the Fall meet at LALS. Hopefully I will meet some of you there. I will be there on Saturday. I am working (playing) on some Sandy River arch bar trucks. Calling this work just don't seem right, as it's so much fun. I am hoping to have a flat car with side boards made by then to carry the coal for the little tea kettle. Running this little engine is just too much fun! Burning coal is the most trouble but it is worth it. I think I will have a go at firing this little mill on the run. Getting the coal in that tiny fire door while rolling along will be a real challenge. Most of the coal will probably end up on the engine deck, but who cares, having fun will be the order of the day!
See You In The Funny Pages...
Jack
 
Hello My Friends
I am looking forward to the Fall meet at LALS. Hopefully I will meet some of you there. I will be there on Saturday. I am working (playing) on some Sandy River arch bar trucks. Calling this work just don't seem right, as it's so much fun. I am hoping to have a flat car with side boards made by then to carry the coal for the little tea kettle. Running this little engine is just too much fun! Burning coal is the most trouble but it is worth it. I think I will have a go at firing this little mill on the run. Getting the coal in that tiny fire door while rolling along will be a real challenge. Most of the coal will probably end up on the engine deck, but who cares, having fun will be the order of the day!
See You In The Funny Pages...
Jack
Hey Jack- I have a gig that night but am hoping to make it out for a bit..
 
Discussion starter · #7 ·
Hello My Friends
I hope to be there by 9:00 or 9:30. The day goes by far too quickly when running steam, and visiting with friends. I plan on bringing the little Forney, and hopefully the Sandy River arch bar truck for show and tell. I hope to see you there.
Jack
 
Discussion starter · #8 ·
Hello My Friends
Here is something I made today for the little Forney. Now any self respecting locomotive should have a whistle, shouldn't it? So I took one of LBSC's books down from the shelf and went to the section on whistles. His design calls out 7/16" thin wall tube, but what I had laying around was 15/32". That should work just fine. So a couple were made up. One one for my engine, and one for my friend Nico, who also has one of these little coal burners. This is a very simple design and it only took a couple hours to make them. The tubing from the whistle valve to the whistle is 3/32". They sound pretty good on air, but the real test will be tomorrow when I fire up the test boiler and try them out on steam. I will also be making a couple whistle valves tomorrow. One important aspect of a whistle valve is the shape of the poppet. A nice taper on this part allows the whistle to be played like a cheap violin, getting some good WOOoo WOOoo action. Too much fun! I'll have some more pictures tomorrow.
See You In The Funny Pages
Jack
Image
 
Discussion starter · #9 ·
Hello My Friends
Having just too much fun here with the little Forney. Here is a snappy of a couple whistle valves. I didn't want to go blasting holes in the little boiler to hook up the whistle valve. So it will share a banjo bolt with the pressure gauge. I'll have to make a longer banjo bolt, but I can't until the M5 x .5 tap and die arrive. The operating lever for the whistle will be accessed just inside the fireman's side window. I thought about radio control, but for now I'm having fun with the hands on approach.
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I made a couple whistles the other day and they worked surprisingly well, on both air and steam. They were easy to make so I thought I would make a small gaggle of them just for fun. I'm going to try some different throat widths. LBSC called to a .030" throat. That seems wide to me so I'm going to try .025", and .020" tomorrow. Fire up the test boiler and see what happens.
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I'll have some snappies of the throat discs and how to make them tomorrow.
Jack
 
Jason at the Train Department has Regner metric brass adapters for Tee and elbows etc if you wanted to buy premade metric adapters. I use PM Research tees for the same reason to mount multiple fittings to one boiler insert. Pm is imperial only. Though their 1/4 to 3/16 reducer is very easy to retap the 3/16 end to metric m5. McMasters has a M 5 by .5 tap. I bought mine from them
 
Discussion starter · #12 ·
Hello My friends
I have been busy with other projects and haven't done much on the little Forney. Here is a snappy of the whistle valve fitted up to the boiler. This is the original position of the pressure gauge supply. It will still supply this as that's what the lower banjo ring will provide. I have a very cool pressure gauge that has been in the stash for thirty years. It's a 100 PSI gauge. Too low a pressure for the engines I usually build, but just right for this little loco. This coming week I'll be finishing up this project, and heading to the LALS fall meet. See you there😁
Jack
Image
 
Hello My friends
I have been busy with other projects and haven't done much on the little Forney. Here is a snappy of the whistle valve fitted up to the boiler. This is the original position of the pressure gauge supply. It will still supply this as that's what the lower banjo ring will provide. I have a very cool pressure gauge that has been in the stash for thirty years. It's a 100 PSI gauge. Too low a pressure for the engines I usually build, but just right for this little loco. This coming week I'll be finishing up this project, and heading to the LALS fall meet. See you there😁
Jack
View attachment 66995
That is super cool! I'd be interested in one if at all available.. if not, that's fine too, I know how busy you are! Unlikely I'll make it to the meet as I have back to back gigs Friday and Saturday night... :(
 
Discussion starter · #17 ·
Hello My Friends
Here is a little progress on the whistle valve and mount. This first photo shows the original set up. The pressure gauge was piped up to a banjo fitting on top of the fire box.
Image

Here you can see the whistle valve held in place with a longer banjo bolt. This steam outlet will still be used for the pressure gauge. I used this set up as I didn't want to make another opening in the boiler.
Image

Here is the whole mess with the cab in place. The operating lever sticks out the window just enough for Gulliver to get his fat finger on it. 🤪 Next up, whistle mounts and piping.
Jack
Image
 
Discussion starter · #19 ·
Hello My Friends
I have been having fun here experimenting with the whistles and whistle valves. The first version was lacking in that you couldn't play it. It was basically on, or off. This is a function of the poppet profile. Below we have some parts. At the top is the longer banjo bolt. Below that is a un machined poppet, and below that is the un successful poppet. And below that is the successful poppet. That long taper allows the whistle to be played like a cheap violin. You can get some god wooo wooo action with this one. Now to make some mounts for the whistle.
Jack
Image
 
Discussion starter · #20 ·
Hello My Friends
The little Forney ran like a Swiss watch at the LALS Fall Meet. Everything worked as hoped, the whistle, the cylinder cock linkage, and the new pressure gauge. Here is a snappy of one of the whistles mounted up under the running board.
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