_RL exf_inscal_wspeed
& exf_inscal_wspeed,
I exf_inscal_wspeed,
I wspeedperiod, exf_inscal_wspeed, wspeedconst,
& exf_inscal_uwind, exf_inscal_vwind, exf_inscal_wspeed,
exf_inscal_wspeed = 1. _d 0