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Do i need to calibrated compass ... for a new locations that 100 kilometer away ?

Discussion in 'Inspire 1 Discussion' started by fei8820, Jun 12, 2015.

  1. fei8820

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    I going to having some aerial photo tomorow.. will travel around 100km from the place i used to fly... do i need to recalibrates the compass ? I will going to a place like very big ferrealloy factory... to have some shot...

    Please advice...
    thanks
     
  2. The Editor

    The Editor Moderator
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    Personally, I would not. I regularly travel over 250 miles to a location and never recalibrate anything - it is not necessary.
    However, ALWAYS check your mod values before EVERY flight (even swapping batteries).
    If they are not right do not take off.
     
  3. nickruss_wales

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    Good tip - I have checked the manuals and cannot find any reference to what sort of range the mod values should be. Can you shed any light?
     
  4. damoncooper

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    Normal compass Mod values are location specific (Mali = 300, Boston = 1200-ish).
     
  5. LockMD

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    Then why does everyone keep saying 1400-1600, no matter the location?
     
  6. damoncooper

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    I guess most folks here are roughly the same-ish distance from the equator
     
  7. fei8820

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    Thanks i just finish my mission today it was very windy.. i take off more than 300meter for clear shot... around 1.5km everything went perfectly. Now i would like upgrade range extender... at the future is not about long distant i get.. but to make sure i have 100% in control of my video n the aircraft...
     
  8. David Gibson

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    So, If I understand you, Would I be correct in doing a compass calibration and noting the values when completed and then use those values as a guide for checking them on later flights.
    Or is there a bet way of getting the correct mod values for my part of the world (UK)
     
  9. tweaker

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    Very interesting wrt Compass mod values. I was under impression 1400-1600 was the acceptable parameters no matter location.

    Do the parameters vary dependent on where you are on the planet a bit like magnetic variation when turning a grid compass bearing into a magnetic one? It would make sense if it did-but I have only seen the 1400-1600 guideline given.

    Can anyone elaborate? Do we need to compile a sticky with acceptable mod values for specific locations worldwide?

    Thoughts-as the cat is thrown amongst the pigeons!!
     
  10. Outta Control

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    Actually a better question should be is if we can collect and have a list of recommended Mod Values throughout Merika Would be nice for all.