Terry Harper

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About Terry Harper

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  • Birthday 11/13/1963
  1. Speedster Builds.............

    Joe I agree - some of the early engineering is quite remarkable. For instance the copper water jackets used by Corbin or the later Franklin cylinders with the copper fins cast intergral with the cylinder casting. We have lost something by moving away from trades and crafts and embracing mass production on a phenomenal scale. Things don't seem to have a soul anymore. One has to wonder how much improvement many of these brass era automobiles went through. I remember reading how one family at least - come winter when they would lay-up the automobile till spring, would just about completely disassemble it and re-build it in preparation for the coming season. I always wondered how wide spread that practice was and how many "tweeked" things just bit.
  2. Speedster Builds.............

    Hello Alan, Joe and I have been discussing similar stuff back channel and I have been doing some intense research. Did you know way back in 1917 someone was offering a electrically heated bakelite steering wheel? (LOL) With the magneto coupling project winding down my students and I are in search of another project.
  3. Speedster Builds.............

    No problem Alan, Joe just gave me the SAE specifications from 1920. However, it was noted that the recommendation for the SAE standard was based on data from 56 companies (both manufacturers and users) and that they were using 58 different types and sizes of radiator caps! Not much help there if a vehicle dates prior to the standard! All part of the fun!
  4. Speedster Builds.............

    Hello Alan, Can you do me a favor - could you measure the OD and thread pitch on your Locomobile filler neck? I am assuming its outside thread as well - curious to see what it is. Best regards, Terry
  5. Mike, When it comes to starting mine it will probably be the same type of rig since I have not found a starter and have no desire to flip it by hand! T.
  6. Hello Mike, I can feel this is getting very, very close to coming back to life! Don't forget the video!
  7. Valve Shrouds for Wisconsin engines

    Hello Layden, I could be wrong but they should be same since they are both 4-3/4" bore x 5-1/2" stroke which matches exactly the type 'A' Wisconsin engines. The only other 4 cylinder Wisconsin engines of the era are the 'Q', 'C' and 'B' which all have 5 inch stokes but have varying bores from 3-1/4" to 4-1/4" We made these for a collectors 1918 FWD using a surviving one as a go-by. I don't know about sheet metal shrouds. I know the later post 1920(?) "M" and "P" series (though different in a number of other ways) has much larger dia. lifter guides though they still used cast aluminum. I have made the spring clips in the past - its not that hard. The shop drawings includes the dimensions etc. Below is a photo of the bending jig I made-up. I had another tool I made to mount in the check of the lath so I could bend the loops in the ends manually turning the chuck. Note that the shrouds shown are for the later 'PT' series 6 cylinder Wisconsin (5-3/4"x7") and are quite different in size and design.
  8. Valve Shrouds for Wisconsin engines

    Hello People, Back this past spring my students reverse engineered the valve shrouds used on many Wisconsin T-head engines including the four cylinder model "A" (4-3/4"x5-1/2") used by Stutz, FWD and others. We also created a set of pattern and core boxes as well as shop drawings. If you are missing some or all or just want a set please PM me. Please note that these are "as cast" and will require machining and finishing. The shop drawings also includes info for the spring clips that retain the two halves together. These will also fit a number of Wisconsin T-head engines including the models A, G, J & L as well as the marine variants: AM, GM, JM & LM Best regards, Terry Harper
  9. Update.... We finished the shop drawings and 3D printed a mockup (just for fun) We also started milling out the patterns. We should.... key word.... should have the patterns all done next week. We had to set it aside for a bit so we could mill out some parts for our UMO steam engine project. The patterns will be setup on a match plate with the runners and gates and shrink bob and allow two sets at once to be cast. I usually mill my patterns out of pine but since these are small and fragile I decided to use some mahogany I had on hand. Since this is a rather open grain wood I will have to fill the grain before applying the shellac.
  10. Speedster Builds.............

    Hello Alan, Do you have a carb for the Wisconsin "M"? My "PT" takes a Stromberg M4
  11. Yes, it appears that way and yet the patent states that they "... are preferably ordinary gear teeth" We will be doing a number of sets - thus the castings. In this case theWire EDM would indeed be the way to go to cut the teeth. The patent states that this design would provide for fine adjustment of the magneto timing. I guess we will see!
  12. Just an update for folks, Using the patent drawings and measurements of a few surviving parts we were able to "reverse engineer" the Milbarth Magneto coupling as Mike has on his engine. From what we can tell these were proprietary to Wisconsin Motor Manufacturing since Milbarth was one of the founding partners. These coupling would have been used on the T-head Wisconsin Model "A" (Stutz, FWD, etc.) as well on the model "L", "G" and "J" engines and their marine variants (AM, LM, GM & JM) First we modeled each component in 3D. Using these, we assembled a complete 3D model and generated the 2D shop drawings that will be used for machining the castings etc. We also generated the 3D models for the patterns. We will use Fusion 360 to generate the tool paths and post process to PathPilot for our Tormach CNC milling machine. I have some nice mahogany all laminated up so next week we can mill out the patterns. The disk is actually leather which I thought was a neat feature. Interestingly we recently finished the core boxes and patterns for the valve covers for the same series of Wisconsin engines. Below is a batch just out of the foundry. I love this stuff!
  13. Hi Mike, If your not in a big hurry it would make a great project for some of my students. At the very least you would end-up with a set of shop drawings and perhaps even the patterns. Meanwhile I am sure you can come-up with a temporary solution (hose method perhaps so you can get the beast running. Let me know what you think. Best regards, Terry
  14. Hello Mike, I figured out your magneto coupling. It was a design developed and patented by Arthur J. Milbrath that was granted in 1916. Milbrath was the founding partner of Wisconsin Motor Manufacturing Co. There would have been a two split collar with grooves that match your surviving cog type gear. This in turn was bolted to a drive disk keyed, pinned or interference fitted (drawing is not clear) to the magneto. How many years Wisconsin used this design is not known but I can tell you its the first time I have ever come across it. It would be awesome to find an original or fabricate a replica. Certainly an interesting and unique coupling! Attached is the PDF file of the Patent. Best regards, Terry US1195250.pdf
  15. Mike, I take it the Mag isn't original to the engine. Here is a photo of the mag coupling on a model "M" Wisconsin of the same era as your engine. My later (1926) Wisconsin doesn't have the "spider" type rig that your mag has. Its uses an AT-6 mag with a fiber disk.