Runway Declared Distances | TORA, TODA, ASDA, LDA | Takeoff Distance Available

There are a lot of new acronyms creeping into aviation. Runway declared distance information gives us TODA, TORA, ASDA, and LDA. Here's a quick guide to deciphering these terms, and what they mean for flight planning.
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[@thebadgerpilot]

This is probably the most under appreciated lesson in private pilot training. I hear too many pilots talk about the 50/70 rule (it has its place but it's not the norm) or things like "I just double the takeoff roll as my runway minimum length." I got grilled on this pretty good during my checkride (I said I like to triple the landing roll) and have used accelerate stop distance (plus a 10% buffer) as my minimums ever since.

[@KyleRodgers]

Great refresher. The graphics and the scale at the bottom are very helpful. I've never seen it visualized like this, which made it all much more understandable.

[@garyxu5929]

Very easy to understand and remember with the graphics and real example!

[@mwp1088]

This came up in my last ground lesson with my cfi, good timing!

[@jordan2447]

Always was curious on all those numbers in the chart supplement. Thanks for clearing some up.

[@jasonchipkin]

Excellent info. I recommend my ATC trainees watch your videos as well. 👍

[@cartermichaelmcmillan3105]

I’m obsessed with your videos, keep up the great work

[@williamk5998]

Thanks for the reminder. I memorized this for my commercial but needed a review. With my Maule runway length is largely irrelevant.

[@Zulu823]

Great video!
I believe you could have included some safety factors for class B sep, mep class A to better tie in the aircraft performance with the field distances.
Keep it up, as a student pilot your work helps a lot!

[@utar88utar]

man, you are good.
thanks for this presentation.

[@koreanbbq3497]

Thank you!

[@AviAeroAsis]

Thank you. It was informative.

[@Ceusky]

Buenísimo !!!

[@imagerysd]

Awesome explanation👏👏

[@Joe-zr5bv]

Excellent video!!

[@jimsherman8665]

Very interesting, but you didn't tie the 4 distances back to your first example of the taxiway diagram. I looks like the TORA is what's on those diagrams, and I assume the TORA is the same in both directions.

[@johnopalko5223]

The number on the airport diagram is the physical length of the runway, exclusive of stopways. The declared distances may be more or less than the physical length of the runway. If declared distances are not published, TORA, TODA, ASDA, and (usually) LDA are assumed to be equal to the physical runway length. If there is a displaced threshold, LDA is shortened by the amount of the threshold displacement. See AIM 4-3-6(c).

[@parthsharma3138]

any plans to have a sports pilot license course?

[@alinajmaldin]

I believe that you technically can land on a displaced threshold, but it's not recommended because of possible obstacles and it's not included in the LDA.

[@Airops-td4qs]

Won't there be any implications of the bearing strength?

[@alinajmaldin]

@@Airops-td4qs I think you're referring to stopways which are not load bearing and are designed to collapse when an aircraft goes on them to slow them down.
Displaced thresholds are load bearing. They are just the rest of the runaway, except they are designated as displaced because of an obstacle or something.

[@geekygardener1730]

The more I learn, the less I realize I know

[@aldohattonduran5227]

The best videos ever produced 🇺🇸✌🏼✈️🛫🛫🛬🛩️