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  1. M

    OS Gemini twin rear carb gas conversion

    And it's just starting to get interesting! So far I've addressed the Glow Plug drawback and the stock carb drawback. What I still had was ridiculous complexity, sludge down the bottom of the aircraft and some alcohol related corrosion albeit not as bad as when running nitromethane. To solve the...
  2. M

    OS Gemini twin rear carb gas conversion

    But I still had the tiny venturi/fuel draw problem. What I needed was pumper carb - Walbro style- which pumps and regulates fuel. Since I couldn't readily find one to fit this installation, I manufactured it out of Walbro and other parts. First I machined off the pump section of a Walbro...
  3. M

    OS Gemini twin rear carb gas conversion

    So the first thing I addressed was the glow situation. I contacted Adrian at C&H Ignitions and ordered his wonderful ignition conversion for this engine. It works great. Here it is in a Sig Rascal 110, which was a wonderful engine/airplane combo. This is running on straight methanol, no nitro...
  4. M

    OS Gemini twin rear carb gas conversion

    Really couldn't find a post category that this build fit so I'm going to post this here in the engines area. I've always loved the Gemini twin but the actual operation of it in a model aircraft has real drawbacks: 1) When run on the factory recommended fuel, methanol with 15% nitro, the...
  5. M

    Hodgson 9 cylinder radial plans (in a nice binder) and rear casting for sale

    After further discussion I am lowering the price to $100 plus shipping. Just want to find a good home for these! Mitch
  6. M

    Hodgson 9 cylinder radial plans (in a nice binder) and rear casting for sale

    I bought this years ago and now that I bought a Moki 300 I will never build this engine. I would guess it's 100 or 150 drawings. I started to cut the crankcase years ago so that drawing has some fingerprints on it (-: but the rest are pristine. Beautiful plans and casting. Invoice says I paid...
  7. M

    Another Knucklehead Build

    I wouldn’t settle for anything less than depleted uranium ;-)
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