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  1. WonderousMountain

    Metal tube joint basics

    We built a bolted Geodesic dome this way Not much for joint strength, but failure mode will always be buckling - in that structure. No wear was reported. Mostly holds up drapes.
  2. WonderousMountain

    Stagger 4 engine CAD

    So the issue stumping me now is Re-starter ring sizing. Auto motive type engines have flywheels in excess of the crankcase width, some very much so. What I'd like to determine is how much advantage this really gives in a midflight restart, or more to the problem, what examples are there of...
  3. WonderousMountain

    A FrankenFour Inline?

    Thread rift! FrankenFour, not FrankenRadial!
  4. WonderousMountain

    Nikasil Cylinders

    Nickel coatings are proven, but can harden, flake and trouble ring seal.They're my plan b liner. I prefer blueprinting with homogenous material.
  5. WonderousMountain

    Very low aspect ratio planes?

    Hi, Flying Blind. Welcome to the virtual hanger.
  6. WonderousMountain

    Gotta make this exhaust part

    This ^^^ . It will also work with properly sized wheel. Plug one end, fill, plug the other end, or as recommended by professional manifolders.
  7. WonderousMountain

    The 'daydreamers' thread...post your craziest designs and concepts here

    Doesn't belong here, that's totally sane.
  8. WonderousMountain

    A FrankenFour Inline?

    Think you'll get better fuel consumption with a 3 valve head. Driven by a single camshaft. Like the block, the block-head Is probably going to need modification or substitution. Plate Based case is a good deal. It could even be bolted, depends on our luck with Gaskets. Planetary redrive...
  9. WonderousMountain

    A FrankenFour Inline?

    Certainly, No need to do it the way I am. Case is all that really HAS to be new. You need to be a stringent and creative project manager. Absolutely, secure in your vision and performance requisites. There are many areas to absorb benefits, and all of them opportunities to falter. Suzuki...
  10. WonderousMountain

    Briggs vs Kohler and the state of the market for modifications

    How much does that cost? Your sump, and all the little extra bits to install it. How do you figure the installation expenditures?
  11. WonderousMountain

    Briggs vs Kohler and the state of the market for modifications

    Kohler's Command line runs a 2.64 stroke, while B & S made The jump to 810cc with a 2.89 stroke at nearly identical bore. Compared to the ductile iron one, the original has 88% the cc. What I'd like to do, is go a little further than that, opening it up 900cc, to get the power without Revs...
  12. WonderousMountain

    Briggs vs Kohler and the state of the market for modifications

    Watched a few instructionals. Zach Kerber has a CNC breather plate. Problem solved. One of them showed a ductile iron stroker Crank. another refurbished with new valves & a maxxed out bore. The market does seem to be getting along. With a good build up plan and an improved Crank, I think the...
  13. WonderousMountain

    Very low aspect ratio planes?

    The second cheapest way to fly being three of them.
  14. WonderousMountain

    modern equivalent to doped canvas?

    I walk past the Wooden Boat school, most lunches. There's two good looking doped canvas boats docked. Basically no. Just be glad it's not manilla & Tar resin.
  15. WonderousMountain

    Thread AWOL.

    Sorry to hear that, Maybe just put up another thread if you think the subject Matter is deserving. It looks like the delete may have been A snafu, since nobody is calling you out.
  16. WonderousMountain

    Industrial engine conversion. *Private* group.

    There are head replacement gaskets, bolts toqued low. I'll cad draft a top-plate for the bad beather Housing. It will be useful to somebody. It does look stout, but if it's not the plate, then it's got to be fastener or gasket. This gasket is the upgrade (exciting right.) It looks similar...
  17. WonderousMountain

    Stagger 4 engine CAD

    Today's session result. Original crank was not too realistic. Been needing to estimate the counterweight for bearings, rods & pistons. Closer?, maybe a little. Been trying for crank pin overlap, but that could be tricky while targetting a low weight. The program gave me the mass center from...
  18. WonderousMountain

    The 'daydreamers' thread...post your craziest designs and concepts here

    BiTandum plane is pretty out there, although it has it's own thread. Kind of blocky so I set it down for a while, but now I like it as an A 2 B. We'll see. Still need the engine for it that is small & light-also cheap... Note: Revised tail is for trim, not pitch control.
  19. WonderousMountain

    Very low aspect ratio planes?

    The Piana Canova had wood covered Wings. Although light, it's CG would be around 50% Chord. Normally, we would advise the spar to be at the 1/4-1/3 mark, but with Diamond LAR, it's probably just as well in the middle. Edit: Only the Wing structure is 50% Chord, The engine would offset this...
  20. WonderousMountain

    Industrial engine conversion. *Private* group.

    The Kohler Kt725 has enough room to increase the stoke substantially (898)cc. However, it's physically larger and weighs 85lbs dry. Looking at it from the EA-B, or microlight category might be fine, but for FAR 103, it's a big hurdle. 30lbs empty weight from 200, is a 15% drop in weight...
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