Engines > From Kits/Castings
Myers Model engine works Murdoch single cylinder
55fairlane:
At last years Indiana Model Engine Show i met Mr John Jensen, he purchased Myers Model engine works & is offering the entire catalog.
I am going to build the single cylinder murdoch. This is a large engine with an 7 inch flywheel, 1¼ bore X 2½ stroke. https://myersengineworks.com/product/murdoch-vertical-oscillating/ note the 6 inch scale under the flywheel for size comparison. Same engine pictured on his business card
My initial inspection of the castings is not quite applicable as most of my kit is a "2nds". I believe the exseive casting flash is the reason for these being 2nds, none the less these will clean up nicely and should machine nicly. these castings are made off the original molds Norbert Keeley had made in 70's when he designed the engine. The kit includes base, 2 uprights, upper bearing blocks, flywheel, cylinder and cylinder heads, intake manifold , crankshaft throw & 3 pages of drawings.
A note about the drawings, these are hand done to the standard of the late 60's/early 70's . No tolerances given. No "finished surfaces called out. No reference dimensions. Study these carefully, even i a master machinist find these hard to follow at times.
55fairlane:
Step one.....using this very sharp & corse file, start to fettle the uprights while think about how I want to tackle the base & uprights. I have a basic idea , but want a more complete thought before starting.
Please be very careful with sharp edges on your tools, my thumb was the guest of honor at a blood letting ceremony
55fairlane:
I knew the base and uprights are "table work" , but as the world's laziest tool make it did not want you pull the vise, so I swapped the jaw to the outside position, grabbed some parallels and the tooling plate I made early in my apprenticeship.......instant table, and the vise is still on the machine....
I got the base mounted and tried up as best I could with an indicator. After I get the bottom of the casting tried up, I will use a long endmill and clean up the casting flash.
All was going splendid until the thunderstorm caused a power outage. *SIGH* oh well go inside and cuddle with the dogs
55fairlane:
Haven't gotten a whole lot done, between the race shop (work) , the home improvement the wife found (painting a room) and the lawn (that first of the season cut & clean up. I hate lawn work.)
I 1st mounted the base casting upside down and cut it flat. After pulling the clamps, I found the base wasn't flat. After pondering "how do I cut this flat with the use of clamps? The clamps will twist the base and once I take it loose, it ain't flat anymore " I tried the woodworking trick.....I burnished painters tape on both halfs, and used super glue.....took ten thou cuts....perfectly flat. Turned the casting over and machined the bottom flat.
Hopefully tomorrow I can figure out how the clamp the base down and start to machine the features called out on the "suggestion "
CI:
:ThumbsUp:
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