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Short field Takeoff and obstacle clearance.

Asked by: 787 views Commercial Pilot, Flight Instructor, General Aviation, Private Pilot, Student Pilot

So, when we calculate distance for the short field take off, we also have to take lift off speed and speed at 50' as well for the execution of successful short field T/O.

Now my question is that, what if the obstacle is higher than 50' let us say 70' then what happens to our distance and speeds?

I am asking this question because I think short field take off can well also be used to clear any obstacle that's higher than 50' and I do not know how POHs came up with this 50'?



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1 Answers

  1. Best Answer

    Kris Kortokrax on Jul 30, 2016

    It’s a certification issue. See 14 CFR 23.53.

    If the object is 70′, instead of 50′, you will need more runway to clear the obstacle.

    There are no performance tables that will give you this information for small G/A airplanes.

    There are services available for jet airplanes which will calculate the runway distance needed based on things like takeoff weight, temperature, pressure altitude, etc. They will also take into account the known obstacles in your takeoff path and will determine whether you can meet first, second, third and fourth segment climb requirements.

    However, these services do cost money.

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