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Recent content by jamesv

  1. jamesv

    Vapor Lock

    Can someone explain the basics of vapor lock to me, and include the typical pressures and temperatures involved? eg. What temps does this occur at in the typical fuel line at normal fuel delivery pressures (30-40psi?). Does it almost always occur in the fuel line under the hood? Secondly...
  2. jamesv

    A/C Heat Exchanger between pressure & suction lines

    I'm an engineer still learning about A/C. Two texts I've read state that installing a heat exchanger to transfer heat from the hot line between the compressor and condenser, to the cold line between the expansion valve and evaporator, will increase system efficiency. (at a minimum, having...
  3. jamesv

    Evaporating Temperature of Gasoline

    What temperature does gasoline vaporize at when contained in the typical fuel delivery line? Do you have figures for it both at atmospheric pressure, and when pressurized for delivery (35psi or so)?
  4. jamesv

    Determining Cruise Speed by Mach Angle

    Great reply, i278. I have little doubt that the F22's published speeds are untrue, for security purposes. As a more reliable check, cruise speed figures for a commercial aircraft such as the Concord are more likely to be truthful. I'll see if I can find a plan photo of it to see if the angle...
  5. jamesv

    Determining Cruise Speed by Mach Angle

    Is it safe to assume that at supersonic cruise speed, it is desirable for an aircraft to fit completely inside the "Mach Cone"? If so, can I then calculate the desired cruise speed of an aircraft (like the stealth bomber) by measuring the sweep angle of its wings and finding the...
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