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Thread: Announcing the Merc 888

  1. #101
    Team Member daveswaves's Avatar
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    Tech Team your attachments are not showing up.

  2. #102
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    Default Electric turbo & more

    Quote Originally Posted by Techteam View Post
    the nice thing about the merlin or other aero engine conrod arrangement is the master rod creates a bearing journal for the second rod.
    Answering a few questions:

    1) I looked at the electric turbo right until the price tag appeared, then, thought about building one myself. Not knowing if the engine would even run, I opted for the leaf blower option.

    2) The Merlin/Allison blade & fork rods run on a common crank pin; nice pics - thanks. If money were no object, I'd have built a custom crankshaft and used a true blade & fork to keep the cylinders directly opposed.

    3) The design I'm using is very similar to a radial engine master and link. For those not familiar, the radial engine has only one crank pin. The "master" rod rides on the single pin; "link" rods are connected to the master.

    4) Unfortunately, there is no room for a conventional radial master- link design. The custom pieces are identified as "blade" and "fork" for convenience only.

  3. #103
    U.K. J 250 - Euro JT250 Techteam's Avatar
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    Quote Originally Posted by Tim Kurcz View Post
    3) The design I'm using is very similar to a radial engine master and link. For those not familiar, the radial engine has only one crank pin. The "master" rod rides on the single pin; "link" rods are connected to the master.
    Yes sorry I forget that I don't worry about the cost of things because our customers have deep pockets.
    Attached Images Attached Images   

  4. #104
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    Default Hybrid master & link

    Quote Originally Posted by Techteam View Post
    Yes sorry I forget that I don't worry about the cost of things because our customers have deep pockets.
    If/when the concept is proven, a more robust design might be built.

    Nice pics of the corn cob! Are the Merlin and R-4360 your pieces?

  5. #105
    U.K. J 250 - Euro JT250 Techteam's Avatar
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    My pictures but not my engines, guess we were just interested in the same way of doing things. If anybody is ever in Munich the Deutsch museum has a fantastic collection of cutaways. I've learned when designing engines you can learn a lot from the past. Trying to convince people to buy something new or revolutionary is almost impossible.

  6. #106
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    Been there! Fantastic museum!

    Jeff
    "We live at the bottom of an ocean of air." - General Marvage Slatington

  7. #107
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    Default Critical infrastructure

    It's been hectic lately, and progress has been slow. Critical parts acquisition includes a Merc 1000 flywheel with 9-1/2" ring gear from Steve Wheeler, and a Merc 500 starter motor from Doug Kay. You may notice the BRF demonstrating bugs again entering text right to left, so it's unlikely images will upload. If not, you'll soon see the starter motor and flywheel fitted. Work will be slow during the Christmas period, but next will be the rods.

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  8. #108
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    Hose clamped in place! Sure, why not.

    Jeff
    "We live at the bottom of an ocean of air." - General Marvage Slatington

  9. #109
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    Default Hose clamps

    The hose clamp is an excellent fixturing device that enabled easy bracket mockup. Once the spanner is welded, a cross bolted support will be added to the starters inner bottom stud. The clamp will likely remain to provide additional clamping. Oh yeah; it's very convenient there's an extra set of fuel pump pads....

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    Last edited by Tim Kurcz; 12-19-2015 at 05:32 PM. Reason: Additional info

  10. #110
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    Very clever, as is this entire project!

    Jeff
    "We live at the bottom of an ocean of air." - General Marvage Slatington

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