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  1. S

    Lighweight opposite 2-stroke engines

    BMW motorcycle engines are used in aircraft. Here is a picture with a propeller speed reduction unit attached.
  2. S

    100LL Ban - Not the story you expect

    isobutanol is an excellent "alcohol" or "oxygenate" in that it does not absorb water. IIRC is has a lower octane number than ethanol, perhaps near 91 to 95. It also has more energy than both ethanol and methanol, and can literally drop in, pure in an automobile.
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    Electronic Steam Gauges? Do they Exist?

    RC Allen mini is what I plan to install in place of AI. RC Allen Mini6 Multifunction Digital Instrument FAA TSO | Aircraft Spruce Keeping traditional TC, Airspeed, and VSI. Still thinking on the DG, as I want an HSI function and slaving, even though most of the time we fly off a moving map these...
  4. S

    Auto fuel STC and Ethanol

    You state: "Orion: your STC'd for Auto fuel so you should be able to run it fine.." This is an extremely uneducated and dangerous statement. All autogas STCs were written to exclude fuels containing ethanol. It does not address increased vapor pressure with alcohol blends. TCP is for aiding...
  5. S

    Why not EFI

    In 1500 hours of flying, I had one carburetor issue, in a twin, where one side burned as much as 1.5 gallons an hour more than the other side. It ran "fine" though. I don't think you can have EFI without 10 lbs additional weight, however. Carburetors can be gravity fed, and work off gravity and...
  6. S

    electronic ignition? magneto retrofit?

    The primary ( and secondary) current reverses with each firing. Here is a good video of what is happening inside. The need to switch "A/C" current creates the problem for designers. Surefly is battery powered. Pmag uses a stepper motor as a generator.
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    100LL Ban - Not the story you expect

    " neat regular is 83-84." You are correct, but the name for this product is CBOB Conventional Blendstock for Oxygenate Blending. The Gasoline BOBs – CBOB and RBOB (and CARBOB)
  8. S

    Non- Biased Engine Reviews -Viking

    Dual fuel is a great idea, esp. if two separate controllers are used. GDI engines make soot, like diesels. This soot is flying around in the cylinder, and some of it is drawn into the intake manifold especially during the overlap period. A light film of oil from the breather is just what is...
  9. S

    Ignition help needed

    If it sparks turning by hand, I would say the mag is in good condition. I think the rotor is indexed wrong. When you installed it, I assume you used the pin, in the appropriate hole? L/R/X This corresponds to the magneto label for rotation. X is for LASAR.
  10. S

    UN hails end of poisonous leaded gas use in cars worldwide

    @ WKTaylor "NOTE2. My new cars will run with up to 15% alcohol... but 20% would likely cause engine/accessory/sensor damage." Not true, at all. If the car is designed for 10% nothing will be damaged. In fact I run my car on E85 to E0 and many other ratios. It is happiest around 40% but is...
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