The Victa Airtourer uses pre-stall buffet as its stall warning 'system'. Or more correctly, for flaps 0 stall warning.
A horn is used when flaps are extended.
The buffet is quite noticable through the column in the clean configuration, less so with flaps out.
A lovely little a/c. Won the Royal Aero Club competition in the 1960s
for a new training a/c.
Aerobatic, reasonably roomy, good visibility. The 100 hp versions are a bit anaemic in their performance but a 150 or 160 hp version is certainly fun. They glide like a brick though.