Terry Harper

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About Terry Harper

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  • Birthday 11/13/1963

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  1. Terry Harper

    Locomobile Parts Department "For Sale"

    Hello Alan, I have a scanned copy of it and will forward it to you. I just need to finds it! I am pretty sure its on my school computer. It's a pretty straight forward process using silicone molds and colored phenolic resin castings to simulate the bakelite. I have been working on one for Joe. His is a modified version of the one shown below. We currently have the 3D model now I need to either 3D print or CNC the master. Cheers! Terry P.S. In regards to the Wisconsin... I finished and painted the patterns and core boxes for the rear water manifold and have most of the pattern pieces printed for the front fitting. Its a slow process but they are looking great!
  2. Terry Harper

    What Make engine on the back?

    Thanks! looks like that would be it!
  3. Terry Harper

    Show me your Foliage!

  4. Terry Harper

    What Make engine on the back?

    Here is one for the sleuth's. As you can see on the back is a two drum donkey engine powered by what looks like an automobile or truck engine from the looks of the radiator. Any ideas what make or model it may have once belonged too? The truck itself is a Lombard 8 ton model "T" which has survived and resides in a private collection. Best regards, Terry
  5. Terry Harper

    Using 3D technology

    In my first post on this thread I posted the renderings of the patterns for part no. A27A (Lower water manifold rear fitting) Today we finished 3D printing the last of the components for the pattern and core boxes. These will still need to be post processed - cleaned-up with any imperfections filled and sanded. Once that's done they will be primed, wet sanded and then a gloss top coat applied - the better the finish the easier the pattern can be pulled from the mold and the better quality casting. Below is a photo of the patterns, follower and core boxes in the raw just out of the printer. You can see some of the rough areas where the temporary supports were attached. The supports allow you to print over hanging features. They are easily broken away and removed after the print is complete than the rough areas sanded, filled etc. One piece took over 57 hours to print. Granted after doing the setup and sending through the file it simply ran by itself and I was free to work on other things. In the 3D printing world a quality print equals time - lots of time unless you are using the megabucks equipment. 3D printing reminds me of when Texas Instruments came out with the first hand held calculator - they cost a lot of money back then now I can spend a couple of bucks and buy a calculator that has the same functions and is a lot smaller. Same with 3D printing. I printed these using our Creality CR-10 which sells for less than $1,000.00. The quality doesn't match the megabuck commercial equipment but it does a real nice job. Now its onto printing the patterns for the front fitting. Best regards, Terry
  6. Terry Harper

    Speedster ore torpedo style seats

    Not sure if this would work for you but with that narrow chassis how about individual staggered seats with the passenger seat set back further than the front and a slight overlap. This was common with a lot of early racers.
  7. Terry Harper

    My 1910 Mitchell "parts car" project

    Looking good Joe! The other factor in regards to engine RPM is how "horsepower" was produced and used back in the day. Comparing a big T-head or other early large displacement engine of the day with modern engines is like comparing apples and oranges. For a number of years I had an interest in the hobby of building replica WW1 aircraft - Fokkers, Sopworths etc. Since WW1 era Mercedes or Le-Rhone rotary aircraft engines are made out of un-obtainium builders had to find modern substitutes. Invariably these were modern products from the likes of Continental, Lycoming or others. The problem is the performance of a 130 hp Lycoming is nothing like that of a 110 hp. Le-Rhone rotary cranking out over 400 ft/lbs of torque at only 1,400 rpm. Yes, the Lycoming produces considerable more horsepower but the torque (approx. 262 ft/lbs) just isn’t there. Try swinging a 10 foot prop at 1,400 rpm with a modern 130 hp 0-290 Lycoming which churns out peak hp. and torque at approx. 2,600 rpm – it’s not going to happen and as many discovered, once a suitable prop was installed, that the aircraft was decidedly under powered. Same with the big T-heads. The horsepower rating may be small but the torque – which really does the work, is massive. Back in the day this suited the technology. Transmissions and clutches were not all that user friendly. The idea was to use all that torque developed at low rpm rather than constantly swapping gear ratios trying to keep the engine in the peak power band
  8. Terry Harper

    This 1912 Stoddard Dayton Saybrook chassis

    This is so tempting. Since finding a Stoddard-Dayton motor would be near impossible I keep picturing this chassis as a wonderful home to my Big 6 cylinder Wisconsin T-head. But alas its all in the ever maddening and mercurial timing/funding continuum. It would need to be sub-framed to fit the mounts and the springs upgraded and the frame strengthened to carry the weight (the big T-head weighs a hefty 1,575 lbs.) I am sure for the appropriate cash outlay a suitable period correct transmission can be found. This gem is mounted on a Chalmer's chassis... I hope this wonderful set of "bones" finds a good home!
  9. Terry Harper

    Got an old photo of you as a kid next to a car?

    Not a car but one of my favorite photos from my youth. Circa 1926 10 Ton model NW Lombard Hauler - Churchill Depot, Maine July 1974. I begged my Dad to let me take it home but..... Same machine Maine State Museum, 2015. Got to play in it again 41 years later.
  10. Terry Harper

    Using 3D technology

    Here is another project I did last year. I had to (wanted too!). A friend needed a magneto coupling for a Wisconsin T-head. For a number of years Wisconsin used a proprietary design developed by one of the firm's founders Arthur Milbrath. I had to reverse engineer it using patent drawings and measurements of some surviving pieces. Again the parts were modeled in 3D and a set of shop drawing created. (I also 3D printed a mock-up) Like the valve shrouds I used Fusion 360 to generate the machine setups and tool paths and milled the patterns out using the Tormach 440. Here is the exploded view of the assemply Here is the mock-up, shop drawings and pattern components. Once complete the pattern components were mounted on a match plate and are ready to cast. Here are the finished patterns which allow four sets to be cast at once.
  11. Terry Harper

    Using 3D technology

    That is very true. One thing to remember is that there is a fairly large community out there of folks with "backyard foundries" These are a mix hobbyists and professionals who cast metal for the challenge, fun and their own projects. Most are very willing to to share their expertise and knowledge. Here is a link to a forum which is a great place to contact these folks through. http://www.alloyavenue.com/vb/forum.php In fact most of the casting I have had done are by a gentleman with just such a setup. He and his wife sell crafts at various venues and he casts items for it. He also casts and sells items to the Live Steam railroad people and for his own projects. He does demo's at museums and various events as well. Again, this is a hobby for him - not a vocation, he just enjoys it. When I have something to cast I supply the metal and patterns and we have a "foundry 101" day. Here is a set of patterns we created for the valve shrouds for a 1917 FWD truck. The FWD used the same Wisconsin model "A" engine as Stutz etc. In this case I used a CNC milling machine to mill the patterns and core boxes. So far Peter has cast a number of sets to help folks along with their restorations. Until a few years ago when I started this project I had no clue on how to do this stuff. But like many things we learn. That's the best part of a interest or hobby - you have the opportunity to learn new skills and like any skill once learned it can never be taken away.
  12. Terry Harper

    Using 3D technology

    I am currently working on the lower water manifold for my big 6 cylinder Wisconsin T-head (5-3/4"x7") This is the last major assembly I have to fabricate. Like everything else on this beast it was bronze fittings with brass tubing and disappeared many, many decades ago so we have been working on re-creating as accurately as possible all the missing bits including the intake manifold and upper water manifold - all of which are brass and bronze as well. A number of years ago I fabricated most of the patterns and core boxes for the lower water manifold but they just were not quite right. So... over the past few weeks I have been back at it. I started off modeling in 3D each fitting. I worked from sketches and measurements of originals as well as from silicone molds pulled by a friend off original fittings loaned by our state museum. For some reason Wisconsin decided to use a rigid connection between the front fitting and the water pump. There is a flanged pipe that connects to the water pump and slides inside the front fitting and is held in place with a big gland nut. Here is a photo showing what I mean: As you can see the angle and offsets are critical so everything lines up. The first step was modeling the fittings in 3D. Below is a rendering of the complete manifold. To give you an idea of size its 16-1/2" between the fittings. The connector pipes are 1-1/4" brass tube. With the models and the shop drawings done I 3D printed a mock-up of the front fitting to verify that everything worked. The 3D print got a little messed-up at the top of the curved piece. I forgot to turn on "supports" which creates a temporary structure to support any overhangs etc. Fortunately (it took 19 hours to print!) that boo boo didn't affect the fit between the block and the pump. I also didn't bother printing the gland nut. I also created all the models for the core boxes and patterns. These also will be 3D printed. Each fitting requires a five part pattern - 2 halves for the body, 2 halves for the neck/flange and a backer. Below is one half of a complete pattern on its backer. There are also two core boxes per fitting. In the rendering below I superimposed a complete core. In reality The cores are formed as two separate halves and are glued together after curing. The core boxes will be 3D printed as well.
  13. Terry Harper

    My 1910 Mitchell "parts car" project

    Joe, Given the skill we have seen you display here I am sure pattern making would come easy to you. Heck, if I can figure it out you certainly can!
  14. Terry Harper

    1926 Locomobile Photo

    I am usually not a depot hack fan. (aka model "T", model "A") But there is something to say about one made from a top tier automobile and I really like this one.
  15. Terry Harper

    locomobile 38 bearings zinc or bronze?

    Bronze backed Babbitt would be my guess. which would leave you the option of making or re-using the existing bronze shells or omitting the shells and going with a traditional non-backed Babbitt bearing. Interestingly I have come across one motor that had inserts that were completely Babbitt (see photo) This was for a 1909? Jackson. They used dowels to locate the inserts. However, I very much doubt Locomobile would have gone that route.