For any flight, runway lengths at airports of intended use, and ... takeoff and landing distance information.
FAR 91.103(b)
September 2011 Update:
Testing out the "view on Google maps" to help visualize touchdown/liftoff and abort points.
Copyright © 2011 Steve Kollmansberger. This software
is not FAA approved and is not a substitute for an FAA-approved Airplane Flight Manual.
Always confirm all performance information and operating limitations with the airplane's
FAA-approved Airplane Flight Manual. Estimation errors of 20% or more exist in various
circumstances. Dry, paved, level runways only.
The author of this software disclaims all liability of it's use; USE AT YOUR OWN RISK!