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  • Users: SBBlue
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  1. SBBlue

    Value of Engine Efficiency??

    Here's a somewhat general question I would like to toss out to the group. What is the value of engine efficiency? Now I'm not talking about vague concepts here, but something a little more concrete. If there was something that could be bolted on an existing engine that would increase fuel...
  2. SBBlue

    The Bourke Engine

    Okay, kids, here's your assigment: To learn all about the Bourke Engine. Go visit this website and watch the animation; http://bourke-engine.com/ani.htm Supposedly this engine has superior fuel economy and emissions characteristics. As far as I can tell, it is a two stroke engine. Instead of...
  3. SBBlue

    Intake Manifold Temperature

    Here's a little bit of a strange question. What is the typical temperature in the intake manifold for a naturally aspirated spark ignition engine? Here's why I was wondering. . . . The intake manifold is, of course, below atmospheric pressure for a NA engine except for full throttle...
  4. SBBlue

    The Air Car

    Someone on another thread mentioned the "Air Car" and gave a URL, which is: http://www.theaircar.com I couldn't really figure how the air engine was supposed to work, so I did a google search and found this reference, appropriately enough at a website called "How stuff...
  5. SBBlue

    The Star Rotor motor

    Okay, here's a fun site to visit that has nice graphics and presents an interesting concept; http://www.starrotor.com/indexflash.htm Here's everybody's assignment; Aside from the fact that the actual star rotors device might not function as hoped, what problems will probably keep the entire...
  6. SBBlue

    Smokey's Adiabatic Engine

    Somebody in another discussion thread made a mention of Smokey Yunick's adiabatic engine. I had never heard of it before, and did an internet search as well as retrieve the patent and dug up some old Popular Science magazines that discussed it. For those of you not in the know, Smokey Yunick...
  7. SBBlue

    Jet Turbine Oil Temperature

    I'm visiting from the automotive engine and fuel engineering section with a few simple questions. First, what is the typical lubricating oil temperature for a jet turbine? Second, do jet turbines use oil coolers? Third, what type of oil is used in turbines? Fourth, how often is the oil...
  8. SBBlue

    Flat Plate cooling

    Here's the question; You have a perfectly smooth, flat plate radiator. Air hits head on, and then obviously flows around the edges. Given such factors as plate area, temperatures, and air velocity, what is the appropriate equation to describe the heat transfer? I have partially gone through...
  9. SBBlue

    Rationale for coolant system temps

    What exactly is the rationale for a particular coolant system temperature range? Granted, most IC engines are designed to run at 190-210 deg F. But why? I can certainly understand the problems if you tried to run an engine at 400 deg F, but why not 250 deg F? On the other hand, why not set the...

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