raveney
Well-Known Member
I saw a lot of really nice hit and miss engines last year at a local event. One that I had never heard of is the subject of this build. I have researched online and hadn't seen a set of castings or plans so decided to have a go at it from scratch.
The engine pictured is of unknown HP, but I am aiming at a 2 HP version. Some engines were paired with a cooling tank on a wagon and labeled "Jack of all Trades". I really like how the flywheel hubs are split and bolted to the shaft.
Vintage Machinery has good quality printed catalogs that were used to make a jpeg image and import into CAD. I then made some ratios to scale it to several constraints that I have for this project.
1) flywheel must be able to be turned on a 9x20 lathe. 8" nominal is good size on a faceplate.
2) cylinder size should be close to 1 inch, so I can use my existing honing equipment and boring bars.
3) cylinder jacket and crankcase should be close to nominal pipe sizes so I can fabricate using scrap metal I have access to.
I plan to silver braze or TIG braze the most difficult part: the crankcase. I modeled these dimensions off a buildable crankshaft with 1/2 journals and 3/4 stroke. The original engine uses a cast iron crankshaft, but I will likely fabricate one from mild steel.
I think I can use 3 inch nominal sch 40 carbon steel pipe and 3/16 steel sideplates to makeup the crankcase. The fillets will be JB welded after the parts are brazed or welded in place. E-bay has an original part that the seller had many pictures of so I was able to reference all of the features and attempt to figure out how it should function as I go. I plan on sharing the drawings for each part on this build and look forward to having others share the build experience or offer recommendations.
The engine pictured is of unknown HP, but I am aiming at a 2 HP version. Some engines were paired with a cooling tank on a wagon and labeled "Jack of all Trades". I really like how the flywheel hubs are split and bolted to the shaft.
Vintage Machinery has good quality printed catalogs that were used to make a jpeg image and import into CAD. I then made some ratios to scale it to several constraints that I have for this project.
1) flywheel must be able to be turned on a 9x20 lathe. 8" nominal is good size on a faceplate.
2) cylinder size should be close to 1 inch, so I can use my existing honing equipment and boring bars.
3) cylinder jacket and crankcase should be close to nominal pipe sizes so I can fabricate using scrap metal I have access to.
I plan to silver braze or TIG braze the most difficult part: the crankcase. I modeled these dimensions off a buildable crankshaft with 1/2 journals and 3/4 stroke. The original engine uses a cast iron crankshaft, but I will likely fabricate one from mild steel.
I think I can use 3 inch nominal sch 40 carbon steel pipe and 3/16 steel sideplates to makeup the crankcase. The fillets will be JB welded after the parts are brazed or welded in place. E-bay has an original part that the seller had many pictures of so I was able to reference all of the features and attempt to figure out how it should function as I go. I plan on sharing the drawings for each part on this build and look forward to having others share the build experience or offer recommendations.
