Originally Posted by
megan
djpil in an earlier post provided information on how to factor the take off distance for runways that were not as described on the chart, but I'm not aware of any OFFICIAL document giving our newly minted 172 PPL guidance, or anybody else for that matter.
Seems that it has fallen in a hole. CAO 20.7.4 is very specific that short dry grass must be used to determine takeoff distance. Student pilots practice short field operations at grass strips and they get to calculate the relevant distances before they launch off on a nav exercise.
I've seen one big flying school use a modified version of CASA's SE Endorsement Questionnaire to specify short dry grass for the airfield performance question.