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  1. K

    Verner 3-cylinder radial in flight on a replica Farman Moustique

    What specifically prevents the 3 cylinder Verner from sustaining higher continuous hp? Ken
  2. K

    Radial engine

    I'd like to begin looking at a big Diameter piston, one designed for use in an air cooled engine. type 4 vw goes up to 105 mm in the aftermarket. I'd like to have a single large bore piston to build a long stroke single cylinder engine to begin learning on. Does anyone have a large piston I...
  3. K

    Radial engine

    Thanks Dana, Thinking on this heat management, I would think where the cylinder heads temperature is taken is going to vary quite a bit. The intake having chilled mixture flowing thru it will cool the material adjacent to it, inversely, the exhaust port will be a major source of heat with hot...
  4. K

    Radial engine

    Impressive cylinder head temperature control on your mosler. Would seem a single oil cooler would bring the oil temps into range, yes? Since oil only cools when in direct contact with a cooler material, perhaps the case area could provide enough surface area for the oil to be slung about over...
  5. K

    Radial engine

    Thank you Dana, what do think the overall diameter of the vw radial engine in the video would be? I'll keep the internal, planetary redrive in mind. I'd like to try and do it with long stroke to see if it's possible. Weight, cost and complexity being the concern regarding a redrive. Im thinking...
  6. K

    Radial engine

    Thank you all for your thoughts. I've built several modified vw engines...and a lot of stock ones, and my belief is that the the cylinder head needs to be a custom one that can cool 20 hp / cylinder. There's no sense doing anything that makes more power briefly, only to overheat and destroys...
  7. K

    Yet another VW power argument. Again.

    I like the D Motor engines. I wonder if a flat head design that has more cooling capacity has been tried on a big VW engine? They need to worry about proper air flow thru the head with liquid cooling, but it has added weight and complexity, and the radiator(s) have to go somewhere. It's an...
  8. K

    Radial engine

    What prop and and at what rpm would be a good target? Ken
  9. K

    Radial engine

    I'm posting in this existing thread, rather than rehashing old material again in a new thread. I've been contemplating the possibility of making a radial engine for the experimental aircraft category. I'd consider the ultralight group too, but I think the weight constraint makes it difficult...
  10. K

    Yet another VW power argument. Again.

    It's based on the vw engine, yes. I use it as an example as to how extensively modified a stock vw has to be to reach the sought after hp and sustainability that we would like to obtain with lesser modified engines. There is no free lunch. The range of power on the vw based engine is quite...
  11. K

    Yet another VW power argument. Again.

    Motorav Home They are taking an aggressive stance on modifying the vw based engine to withstand full loads...redesigned case, crankshaft, cylinder heads...must cost a fortune, but hp ratings are high. It's interesting to see how heavily built it evolves into with the design focus becomes...
  12. K

    Greetings to all!

    Design would be determined by allowable engine weight and HP required for the airframe. Would hand starting be acceptable? How much weight is acceptable? Give me some targets please. Something to fit an ultralight or experimental? What prop rpm and hp required? I'm curious what people are...
  13. K

    Yet another VW power argument. Again.

    The vw engine has evolved dramatically from it's humble beginnings...in the changes VW made to it and what the aftermarket has provided. The crank case itself provided by vw came in two different grades of magnesium alloy. The early case was die cast from AS41. it was adequate for early models...
  14. K

    Greetings to all!

    My real interest is in power plants for ultralights and experimentals. I worked on a development project for TEAM AIRCRAFT, messing with a redriven BMW boxer twin into an aircraft engine 20years ago and ran into some interesting complications that made me question what would be possible in a...
  15. K

    Greetings to all!

    Hello, I'm Ken. Perhaps, like many of you, my interest in aviation stems from childhood...kites, rubber band powered planes, models,control line models, r/c models, books, museums, visits to the local small aircraft field for a ride in a friends old cub or aeronca. It's an interest once ignited...
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