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  1. M

    FUEL WARNING:

    I have cleaned lots of spark plugs, and ground several valves because people refuse to lean an aircraft motor while using "low lead" gasoline... just saying that there is a down side to avgas too.mb
  2. M

    How does a boomerang actually fly ?

    It's not for me, it's for my ex-wifeI would like to have two too, (with nickel plating, in case of rain), you know you just can't have just one! ;)
  3. M

    Mark Stull

    I joined this site after lurking for more than three years because I finally had something to say...Thank you Mark Stull for your inspiration!!!mb
  4. M

    propellers

    Since this seems to be a propeller/engine discussion, doesn't a flywheel help negate the pulses that an engine creates? Also, some of the GA motors that I have seen have a "flywheel" on both sides of the the motors, and then a prop on one end. One side is for the starter and alternator and the...
  5. M

    OA frustration ...

    Jason, Glad you are testing some parts to destruction, but the words sheared off seems less than good. The metal around the joint should be the parts that finally tear after a lot of deforming (not the weld). Can't see from here but a pic would be nice. When you can beat a 90 almost (sort...
  6. M

    Oscillating power

    Jack, Good that you are checking the egt's, even by hand... Just thinking here, how are you numbering your cylinders?, (doesn't matter as long as you do it the same way that the mag is doing it) and left side is the pilot side? And no, if the fuel level makes a diff you have different...
  7. M

    Oscillating power

    Jack, Just by looking at the pic I would say that the 1&2 plugs are leaning out and starving for fuel, causing the pulsing running that you are seeing. The gaps on 1&2 are not even... can't see 3&4, but they don't look that bad to me, is there some foreign objects that are closing the gaps to...
  8. M

    Oscillating power

    Jack, A leak down test is a system that applies a known amount of air pressure to the cylinder through the spark plug hole and then can measure the amount that is left inside of the cylinder. While there is pressure applied to the cylinder one can some times hear the pressure leak, either...
  9. M

    Oscillating power

    Jack, How close to fouling are the 1&2 spark plugs, by visual inspection? You should lean very slowly and see an increase in RPM if the 3&4 are flooding/fouling. Is compression, and or leak down good on all cylinders? Is there a choke on the carb? What RPM's are getting when running well? (see...
  10. M

    Custom Intake Manifold

    Hey Jeff, I am glad that you will try it both ways, with and without the balance tube. I have tried to find out more about it on the net (not much out there), and most of the time it is used with dual carbs to help at idle (any thing above that did not make a diff). But I also have seen it...
  11. M

    Custom Intake Manifold

    Looks nice so far Jeff, just wanting to know how you will weld those pipes so close together? Have you thought about a balancing tube between the left and right intakes? Mike
  12. M

    Picnic

    I would like to thank all that extended their hospitality to my father and I at the eighth(?) annual Sonerai Picnic. The chairs that were loaned to us for the air show were greatly appreciated. It is a unique perspective for the air show. I now have less anxiety about buying plans for the...
  13. M

    7th Annual Sonerai Picnic!!!

    Hello, Jeff and all First post, I just have a set of plans for a S2 LTS and big dreams :) I hope to be there with my father, but it will depend on the weather, we are flying out of 7M5 in a Zenith Zodiac 601 XLT. If we arrive later, I still hope to meet some Sonerai builders. I am looking...
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