POH Performance Graphs - Wind factorisation
I'm looking at the POH performance graphs for aircraft such as the PA28/38 as shown in the Piper/FAA Manual data. Does anyone know if the winds are factored, i.e. 50% headwinds, 150% tailwinds? I can't see anything in the preamble about any factoring.
NB I am not referring to the CAA additions to the POH where both the winds are factored and the distances with the ANO factor of 1.33 for take off and 1.43 for landing (and yes I'm aware EU factors are different).
Thanks for any help