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Runway Field Length?

Discussion in 'AviatorChat.com' started by menoy, Apr 23, 2009.

  1. menoy

    menoy F1 Rookie

    Mar 12, 2005
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    MRodziewicz
    I know what Takeoff Field Length is, I know what Landing Field Length is.... but I can't find anywhere what Runway Field Length is. Can anyone help?
     
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  3. Bob Parks

    Bob Parks F1 Veteran
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    Nov 29, 2003
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    I think what you are referring to is simply Runway Length. If you are operating out of a facility with a runway you plan your flying around the length of the runway. Runway is a finite prepared surface on a field. If you are operating out of a field then you talk about field length.
    I hope that helped.
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  4. menoy

    menoy F1 Rookie

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    #3 menoy, Apr 23, 2009
    Last edited: Apr 23, 2009
    Takeoff/Landing Field Lengths are defined by FAR (Federal Aviation Regulations) and have nothing to do with whether the surface is unprepared or not, so I would suspect that neither would the Runway Field Length I am looking for....



    PS I got this "Runway Field Length" from a Cessna Flight Manual, which mentions the runway length and runway available. Hence my suspicion that RFL is not simply runway length - if it was, why would it be capitalised and hence differentiated from "runway length" that also appears in the text?.
     
  5. Bob Parks

    Bob Parks F1 Veteran
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    I guess that there is a problem with symantics here and I don't understand the meaning of runway field length. Your talking about two different things in my mind, a runway and a field. I guess that I'm too old to help you.
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  7. Bob Parks

    Bob Parks F1 Veteran
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  8. ea500guy

    ea500guy Rookie

    Mar 14, 2009
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    Hammond, LA
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    EP Pierce
    I've also heard this used to describe TODA or Take Off Distance Available, which includes all available runway and clearway (which is a clear area beyond the runway which must be 500' wide, slope of 1.25%, and under the control of the airport authority).

    If you like that, here are some more you may have thrown at you by a well-intentioned check airman:

    TORA is Take Off Run Availible (which is whatever portion of the runway you are allowed to put your wheels on).

    ASDA is Accelerate/Stop Distance Available (Total distance of runway and stopway)

    Value of "D" is the equivalent balanced field length considering slope and wind

    Value of "X" is the number used to determine the split between V1 and VR

    If you enjoyed all of this, go get type rated by a Fed. While your eyes are shut for the unusual attitude, be prepared for an autopilot malfunction and runaway pitch trim resulting in a fantastic mach overspeed at 30 degrees positive attitude before he says, "Your controls". I think they teach that one to the new POIs during orientation...
     
  9. Bob Parks

    Bob Parks F1 Veteran
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    Nov 29, 2003
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    Thanks a lot. It makes absolutely no COMMON sense to me. It mixes two disparate terms. I'm glad that I don't have to fly in this environment anymore.
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  10. ea500guy

    ea500guy Rookie

    Mar 14, 2009
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    Hammond, LA
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    EP Pierce
    It really isn't too bad. Most of the time you operate in conditions you have operated in before, so you already know what the approximate numbers are going to be. The rest of the time (when I actually need to know that junk), the FMS takes the weight, temperature, winds and runway I plug in, then calculates the rest of that stuff from it's own database of slope, clearway, etc. It makes it pretty easy. You just have to know how to push buttons. Some of the guys I fly with don't even know how to calculate a descent in their head. The box does it all.
     
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