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    1. Kit: , by (VIP/Sponsor) markus68 is online now
      Builder Last Online: Nov 2017 Show Printable Version Email this Page
      Model Scale: 1/8 Rating:  (5 votes - 5.00 average) Thanks: 10
      Started: 05-29-15 Build Revisions: Never  
      Not Supported Scratch Built Build in Progress

      Hello everyone. This is my first posting at scalemotorcars. I`m from Austria (not Australia) and i`m building modelcars since 30 years. This is the first Project in this Dimension. Hope you`ll enjoy it. Sorry but my english is poor.


      Mercedes Benz 540 K Spezial Roadster 1/8

      Build Photos

      Mercedes Benz 540 K Spezial Roadster 1/8-8-2-jpg Mercedes Benz 540 K Spezial Roadster 1/8-5-2-jpg Mercedes Benz 540 K Spezial Roadster 1/8-7-2-jpg Mercedes Benz 540 K Spezial Roadster 1/8-9-2-jpg Mercedes Benz 540 K Spezial Roadster 1/8-10-2-jpg Mercedes Benz 540 K Spezial Roadster 1/8-11-2-jpg Mercedes Benz 540 K Spezial Roadster 1/8-16-2-jpg Mercedes Benz 540 K Spezial Roadster 1/8-17-2-jpg Mercedes Benz 540 K Spezial Roadster 1/8-19-2-jpg Mercedes Benz 540 K Spezial Roadster 1/8-20-2-jpg Mercedes Benz 540 K Spezial Roadster 1/8-21-2-jpg 


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  1. Jo NZ's Avatar Yearly Subscriber
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    Jo
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    Quote Originally Posted by Roger Zimmermann View Post
    When you are citing "easy", "medium" and "hard", do they have a different temperature melting point? It is my understanding that low temperature = low mechanical properties and high temperature = high mechanical properties.
    That paillons technique is widely used in jewellery but sometimes impractical for large soldering like a frame. However, if you are confident with this method, no need to change!
    Hi Roger
    The melting points are :
    Hard 773C
    Medium 747C
    Easy 711C

    So if you're making a complex assembly with several solder operations, using a lower melting point solder each time allows multiple joints without melting the previous one.
    The solder will only flow where there is flux, and it's very important that the joint is completely clean. This can be used to advantage if there are moving parts where you don't want solder. A solution of mud (yes really - from the garden!) painted onto the work will stop solder in its tracks.

    I was only taught to use paillons, and on a long joint several small paillons spaced along the joint can work, but I have some solder wire now to experiment with. I hope it's easier, I lost one radiator for the Alfa through overheating the joint and melting the brass
    QUOTE QUOTE #197

  2. happyfreddy's Avatar Active Member
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    freddy
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    @ markus68
    as told in other forums You did an exellent work same way as Roger Zimmermann

    Soldering brass is even not a easy job even when some smaller parts have to be soldered one after another to a greater part of brass.
    The problem ist still to let the greater part at certain level of heat.
    So I decided to try it by resistance soldering. With this method You only put the heat to that place where it is needed.
    Some millimeters beside the soldering point no warm parts are registrated, so older "done" solderings keep soldered - exact what You want.
    QUOTE QUOTE #198

  3. Roger Zimmermann's Avatar Yearly Subscriber
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    Quote Originally Posted by Jo NZ View Post
    Hi Roger

    So if you're making a complex assembly with several solder operations, using a lower melting point solder each time allows multiple joints without melting the previous one.
    The solder will only flow where there is flux, and it's very important that the joint is completely clean. This can be used to advantage if there are moving parts where you don't want solder. A solution of mud (yes really - from the garden!) painted onto the work will stop solder in its tracks.

    I was only taught to use paillons, and on a long joint several small paillons spaced along the joint can work, but I have some solder wire now to experiment with. I hope it's easier, I lost one radiator for the Alfa through overheating the joint and melting the brass
    Thanks confirming what I supposed about the temperature!
    The idea with mud is interesting!
    I don't have different silver soldering rods but I experienced that when a part is silver soldered, it needs more temperature to get loose again. Long ago, I tried to remove incorrect elements from a bumper; I could but the surrounding surfaces were so damaged that a new bumper had to be made.
    It happens also that while attempting to silver solder a tiny element on an assembly, the previously soldered part(s) said good bye! This problem can be minimized with the use of the soldering paste. However, when doing a complex assembly, I'm never sure if the result will be 100%. This is the way to stay humble...
    To melt the brass requires a rather high temperature, ca. 900C At that point the metal is cherry red, indicating that something is wrong with the soldering method!
    QUOTE QUOTE #199

  4. markus68's Avatar VIP/Sponsor
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    Mercedes Benz 540 K Spezial Roadster 1/8
    A small "Wodden-Frame update".
    Mercedes Benz 540 K Spezial Roadster 1/8-434-jpg

    Mercedes Benz 540 K Spezial Roadster 1/8-436-jpg

    Mercedes Benz 540 K Spezial Roadster 1/8-437-jpg

    Mercedes Benz 540 K Spezial Roadster 1/8-438-jpg
    Mercedes Benz 540 K Spezial Roadster 1/8-439-jpg
    the ring will be underneath the spare wheel recess.
    Markus


    Mercedes Benz 540 K Spezial Roadster 1/8
    QUOTE QUOTE #200

  5. markus68's Avatar VIP/Sponsor
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    Mercedes Benz 540 K Spezial Roadster 1/8
    "I`ll be back" a famous austrian actor and govenor said and now i am back to show some pics .
    Mercedes Benz 540 K Spezial Roadster 1/8-443-jpg
    back mounting (Body - Chassis), silver-soldered
    Mercedes Benz 540 K Spezial Roadster 1/8-444-jpg
    starting with the break booster.
    Mercedes Benz 540 K Spezial Roadster 1/8-449-jpg

    Mercedes Benz 540 K Spezial Roadster 1/8-450-jpg
    screws M1
    Mercedes Benz 540 K Spezial Roadster 1/8-452-jpg
    nearly finished. cable is missing
    Mercedes Benz 540 K Spezial Roadster 1/8-453-jpg
    starting with the master break cylinder.
    Mercedes Benz 540 K Spezial Roadster 1/8-455-jpg
    master break cylinder with distance plate (alu)
    Mercedes Benz 540 K Spezial Roadster 1/8-456-jpg
    starting with the special screws (MBC) M1,2mm
    Mercedes Benz 540 K Spezial Roadster 1/8-457-jpg

    Mercedes Benz 540 K Spezial Roadster 1/8-459-jpg
    finished.
    Mercedes Benz 540 K Spezial Roadster 1/8-461-jpg
    fitted.
    Mercedes Benz 540 K Spezial Roadster 1/8-462-jpg

    Mercedes Benz 540 K Spezial Roadster 1/8-464-jpg
    cable pulley (between MBC and BB)
    Mercedes Benz 540 K Spezial Roadster 1/8-465-jpg

    Mercedes Benz 540 K Spezial Roadster 1/8-466-jpg
    dont know the word, sorry.
    Mercedes Benz 540 K Spezial Roadster 1/8-469-jpg
    starting with the jib-arm (between MBC and BB)
    Mercedes Benz 540 K Spezial Roadster 1/8-470-jpg

    Mercedes Benz 540 K Spezial Roadster 1/8-472-jpg
    finished.
    Mercedes Benz 540 K Spezial Roadster 1/8-474-jpg
    another special screw M1,2mm
    Mercedes Benz 540 K Spezial Roadster 1/8-475-jpg
    all finished parts fitted only by way of trial.
    regards markus


    Mercedes Benz 540 K Spezial Roadster 1/8
    QUOTE QUOTE #201

  6. PaulPK's Avatar Active Member
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    Markus,
    Looking great. I find myself thinking how would I have made that part and your approach is much better. Thanks for the lessons.
    Paul
    QUOTE QUOTE #202

  7. Roger Zimmermann's Avatar Yearly Subscriber
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    Nice parts, Markus. If you are speaking about a master brake cylinder, are the brakes hydraulic? You are showing a spring in one of the brake booster pictures. What is the function?
    QUOTE QUOTE #203

  8. markus68's Avatar VIP/Sponsor
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    Markus
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    Thanks Paul. That is very kind of you. Markus


    Mercedes Benz 540 K Spezial Roadster 1/8
    QUOTE QUOTE #204

  9. PROPELLER's Avatar VIP/Sponsor
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    I admire the quality of your work.
    I admire this ultimate precision.
    I admire the the finish surface quality of your parts.
    I admire the cleanliness of the whole, your workshop ...
    Hat off, Sir.
    QUOTE QUOTE #205

  10. markus68's Avatar VIP/Sponsor
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    Markus
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    Thank you very much Dan.
    To Roger: i will answer your question tomorrow because in english it is very difficult to describe (for me)


    Mercedes Benz 540 K Spezial Roadster 1/8
    QUOTE QUOTE #206

  11. MODEL A MODEL's Avatar Yearly Subscriber
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    Markus, Your work is so thorough! clean, precise and ? I don't know what else to say? Viewing and reviewing your work and much of the work of others on this site I am forced to reconsider my work. . . . Hats off, Sir! -Don
    QUOTE QUOTE #207

  12. Egon's Avatar Moderator
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    Mercedes Benz 540 K Spezial Roadster 1/8
    To Roger, Yes it's hydraulik brakes, spring return pedal, ups big drawing
    Attached Images Attached Images Mercedes Benz 540 K Spezial Roadster 1/8-brake-jpg 
    Last edited by Egon; 06-01-17 at 02:59 PM.
    QUOTE QUOTE #208

  13. Roger Zimmermann's Avatar Yearly Subscriber
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    Thanks Egon! I was thinking that the car still had mechanical brakes; obviously, it's not the case.
    QUOTE QUOTE #209

  14. markus68's Avatar VIP/Sponsor
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    Thanks a lot Don.
    To Egon: as i said, i will answer tomorrow.


    Mercedes Benz 540 K Spezial Roadster 1/8
    QUOTE QUOTE #210

  15. markus68's Avatar VIP/Sponsor
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    Good morning Roger. Let me try now. A vacuum line is coming from the suction pipe and goes below the oil pan and across the frame to the suction air valve and then to the break booster. If you push the break pedal the suction air valve opens and the depression of 0,6 bar streams and sucks off the air in the break booster and pulls the piston (with return spring). So you have a doubling of the power when you push the break pedal. Puuuh, hope ........


    Mercedes Benz 540 K Spezial Roadster 1/8
    QUOTE QUOTE #211

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