Search results

Its for a scale model of the rider Ericsson hot air engine the original part was a casting lined with firebrick and had a stovepipe chimney. I believe they could burn kerosene or coal or wood. I am using a tiny foldup camping stove and canned fuel.

firebox continued... made a oak buck to bend the firebox chimney support in a more controlled manner. This worked really nicely holding the metal square while I TIG brazed the seam. I torch brazed the endcap and chimney spigot. The chimney is just a 12" piece of 1-3/8" brass tube. The firebox...

Firebox the template in the book was printed, measured and then enlarged using the scale feature and reprinted on 11x17 paper. Glued to some cardstock and then trial bent and taped. I added some overlap on the ends and then cut out of 18 gauge steel. I used 1" round bar to make the radius'...

very nice running engine 👍

Getting a little closer. Thank you to Bob Nawa -Bobs Models, for the idea to use a grill stone displacer. I didn't want to thread the full 6 inches of displacer rod, so I just grooved the top and used a circlip to fix the top of the displacer. Sprayed the pumice stone with Hi temp black engine...

Power Piston used a 1" thick rectangular piece of stock to turn this part rather than purchase a 2-1/2" round bar of 6061 aluminum. The interrupted cut was too much for the 9 year drive belt on my little 7x14 mini lathe and it started making terrible noises. I replaced both belt pulleys as well...

Thank you Rich! Does the engine run when spinning the flywheel "over" the crank? I made the connecting links using dimensions in the book, but it seems like one should be double checking to ensure that the phase of power piston to displacer is near 90 degrees.

Walking Beam and Support These two parts required a lot of attention when making the patterns and came out very accurately. For the support, I was able to spot the mounting legs by eye and true the ends in one setup, then flip over and anchor to a fixture plate and finish the bearing saddles in...

Hi Doug, That looks terrific. Thank you for sharing how you held the cove pieces. I was wondering how you were able to thin the other sides. The bearing mounts appear to be worth the effort in the last after brazed photo.

Jason, thank you for the help. I really like the "weathered" finish on your Heinrici engine, and I will attempt that using the recipe you posted with the build log. Well done! Colin, Wishing you a speedy recovery on your eyes. The engine can certainly wait Flywheel and Crankshaft I had a...

Thank you Colin, Would you mind sharing a picture of the campers stove you used? The book has a few drawings where they repurpose a propane torch which looks doable also. BTW did you get the Nash 25 running reliably? The SS pipe I bought was ridiculously over priced for my dumpster diving...

Thank you both Cylinder Sleeve & Displacer Cylinder The materials for these pieces was very expensive at a bit over $200 online. The carbon steel piece was only $50 but the SS 304 with a bore close to 2.000 was way more than I wanted to spend. I couldn't see boring anything available to a...

Both points well taken Jason. :) I confess that I was contemplating both ideas while I was babysitting the lathe take each pass in lowest gear with lowest feed. :rolleyes: The core would have required making a split wooden core mold... correct? I do have a steady, but its not big enough for...

Boring the cylinder took nearly two days. I didn't think about how I was going to counterbore the water jacket. The book also showed the cylinder being held in a much bigger and stiffer lathe chuck than what I have. I used a 10" x 5/8" boring bar with 7" stickout and 1/4" HSS bits. Started at...

Thank you sir! Base and legs were fairly straight forward to machine. I bored the cylinder hole in the mill because it wouldn't fit on the 9" faceplate. The legs were clamped to an angle plate with an aesthetically pleasing amount of angle on them using a picture of the real one. I made my own...

Cleaned off all of the flash from the parts with various files and sandpaper. Here is the resulting home made casting kit My metal lathe is not big enough to use it to face off the base as the book suggests. I will need to surface it in the mill instead. It looks like it will be challenging to...

Thank you for the generous compliments! I got back to the project to cast the last piece... and it came out first try 😁 i really like how the curved spoke wheel looks, can't wait to see it spinning. I am real glad the messy part is done, so I can clean up the sand and sawdust that seems to...

Flywheel the curved spoke pattern was a special challenge for me. I approached it by using an online flywheel simulation, clipping an image, and then printing out a paper pattern full-size. https://rawgit.com/tinglett/MachyTools/master/FlywheelBuilder.html#spoke I then cut a single pie...

Legs these patterns require digging out the sand to an imaginary split line. I had some practice several weeks ago, but ran out of sand so didn't make the pour. The first pour was terrible. I really think the big difference in success so far is the professional parting powder. But improper...

thank you again for the encouragement! Cylinder This is a large part for my experience in sand casting. It will require my largest flask, additional sand, and a real core for the bore. I purchased 24 lb of new foundry sand. It feels much sharper and bonds better than the other sand I have...