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Rank: Advanced Member
Groups: Member
Joined: 7/14/2008
Posts: 247
Location: Germany, CE
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Kerst, the first car of my father was a BMW Dixi and this car had conical shaped leather clutches, too. So leather is a real good choice for clutch surfaces on a scale model power shift. Thanks also for sharing the drawings of the Clark power shift. Wonderful craftmanship!
Cheers,
Max
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Rank: Advanced Member
Groups: Member
Joined: 9/7/2005
Posts: 1,154
Location: Copake, NY
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Thanks for the compliments! I am in self-imposed isolation in my workshop, so lots of time to work on the Clark transmission. Here a few pictures of progress. i worked on the clutch assemblies today, still not finished though. Lots of little parts.   I will connect the input shaft (top middle ) with a flexible coupling to the motor with reduction case. The output shaft (bottom middle gets a bolt-on divider to go to both rear axles. Kerst
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Rank: Advanced Member
Groups: Member
Joined: 2/1/2017
Posts: 177
Location: Goshen, Indiana
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Incredible work Kerst! An interesting Clark note: They were located not far from me in Buchanan, Michigan. They had a testing facility that lives to this day as Clark Testing. I was there just the other day on a work project. Some very large test equipment including many dynamometers for testing these very gear boxes. So if you need to have this one tested, let me know and I'll hook you up!
Keep the pics coming, this is a fascinating build!
Rob
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Rank: Advanced Member
Groups: Member
Joined: 7/6/2015
Posts: 1,317
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Rob they will probably hire Kerst if he goes in there with his project. We need him here.
Amazing work.
Steve
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Rank: Advanced Member
Groups: Member
Joined: 9/7/2005
Posts: 1,154
Location: Copake, NY
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Due to the crisis I have lots of time for the gearbox. It slowly comes together. I finalized the input and output sides. I hadn't thought about these at all when I started building the gearbox, so some adjustments needed to be made. I also had to adapt the whole assembly so it would fit in the truck!   Next are the levers to control the shifting. See how that works out!! Kerst
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Rank: Advanced Member
Groups: Member
Joined: 9/7/2005
Posts: 1,154
Location: Copake, NY
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Today I did my first test run and I took a short video. It is a 4-speed power-shift and the first and second speed work nicely. The third works OK, but the fourth speed seems to take all the power. Too much friction or too much speed. I will consider a bigger reduction between motor and gearbox. Here is the video: https://youtu.be/4hA-Vlfxj6MHere are two pictures of the whole assembly:   Kerst
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Rank: Advanced Member
Groups: Member
Joined: 7/6/2015
Posts: 1,317
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Kerst that is just incredible.
Steve
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Rank: Advanced Member
Groups: Member
Joined: 9/7/2005
Posts: 1,154
Location: Copake, NY
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I added another motor. It might be overkill and it is easy to take it away. I can also easily change the reduction between motors and gearbox. Now it is 1:4. I tried it with the battery with a much steadier output than the transformer. That is good news! I bought some micro servos to control the transmission. There is not a lot of space, so one of them sits outside the cab. Here is the motor unit and the transmission:  Here are both units installed in the truck:  This is the truck with only the transmission:  The servos:  Kerst
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Rank: Advanced Member
Groups: Member
Joined: 6/27/2007
Posts: 1,489
Location: St. Louis, Missouri, USA
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Kerst, your machinist skills are amazing. I always look forward to seeing your updates on your projects. Great work.
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Rank: Advanced Member
Groups: Member
Joined: 9/7/2005
Posts: 1,154
Location: Copake, NY
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Rank: Advanced Member
Groups: Member
Joined: 1/22/2013
Posts: 203
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Truly an epic build Kerst. You’re machining skills are unreal! I grew up in Euclid where they were built, so it brings back memories. Mike
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Rank: Advanced Member
Groups: Member
Joined: 6/18/2003
Posts: 2,187
Location: Charlotte, North Carolina
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Kerst: Where did you obtain your skills? This is so over the top for me. What is your profession now? Great build of course. CAW
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Rank: Advanced Member
Groups: Member
Joined: 3/17/2006
Posts: 1,169
Location: NJ
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Absolutely awesome kerst!
Please keep posting updates.
We rally round the family, with a pocket full of shells.....
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Rank: Advanced Member
Groups: Member
Joined: 7/6/2015
Posts: 1,317
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Kerst, your truck and your craftsmanship impress with every post, it is just incredible.
Steve
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Rank: Advanced Member
Groups: Member
Joined: 9/7/2005
Posts: 1,154
Location: Copake, NY
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I never thought I would get (into) electronics, but so far it seems to work out. In the past weeks i worked on all the electric connections and finding space for the electronics, etc. Although the Euc has a huge hood, I had to try various setups in order to find the right setup that fits inside the hood and cab without being too visible. I bought an 8 channel system. One channel for the speed control, 2 channels for the 4-speed transmission, one for the on-off-on switch for the tipping motor, one for the on-off-on switch for the driving motor and one for the steering servo.   Kerst
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Rank: Advanced Member
Groups: Member
Joined: 7/6/2015
Posts: 1,317
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Kerst you can always go to 1/16 scale, we can wait with your knowledge and skill we are probably looking at a day or two. That’s amazing, had no clue that there was that much involved in RC never mind the cost. Keep up the great work.
Steve
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Rank: Advanced Member
Groups: Member
Joined: 12/13/2005
Posts: 1,321
Location: Latrobe,Pa.
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Yes very detailed ,nice work.
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Rank: Advanced Member
Groups: Member
Joined: 9/7/2005
Posts: 1,154
Location: Copake, NY
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I found the right paint for the Euc. It looks decent, the color is very nice but needs a second coat and I didn't buy enough!! That means waiting.  Kerst
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Rank: Advanced Member
Groups: Member
Joined: 6/27/2007
Posts: 1,489
Location: St. Louis, Missouri, USA
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WOW!!!
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Rank: Advanced Member
Groups: Member
Joined: 6/18/2003
Posts: 2,187
Location: Charlotte, North Carolina
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I cannot wait to see this beast. Looks terrific so far.
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