Anyone else fancy a take off/landing distance calculator in SD? Most of ac, airfield and weather data is already there so only need to add ac specific performance distance data. Would be particularly useful for diversions - is nearest airfield long enough to get into - and out of!

SD already has ac weight, airfield pressure altitude, airfield temperature and w/v as well as runway slope and surface type. Add the (pretty simple) calculation or a look up table/database with the option to input variables ( eg. Surface condition)manually. In common with weight and balance data in SD the necessary ac specific data could be generated by the SD user community and shared.

Sorry, but I simply don't see it. First off, users already have problems entering something comparatively simple such as w&b data. T/o distance data is much more complicated with many more variables such as flap setting, etc. Just look in POH's section for the t/o distance of a couple of different aircraft. They look vastly different, depend on different variables. If you have two engines, it's again a totally different game.

I did something like this once for the DA20 and it was pretty involved. I had to use flight testing data and do a 2D interpolation on several variables. Definitely not something which I would like to do again for different aircraft. And I doubt that many people would have the tools and know-how to do it for themselves. Heck, a lot of people have troubles getting simple w&b data to work in SD.

And then there is liability as well. I would not want to be in Tim's shoes when someone crashes and burns because the t/o didn't pan out even though SD said it would.

-- Chris.