Bishma , 10 months ago (edited 10 months ago)

Here’s the specific bit relavent to OP’s question:

VAWTs often suffer from dynamic stall of the blades as the angle of attack varies rapidly.

The blades of a VAWT are fatigue-prone due to the wide variation in applied forces during each rotation. The vertically oriented blades can twist and bend during each turn, shortening their usable lifetimes.

Other than the drag-types, VAWTs have proven less reliable than HAWTs,[20] although modern designs have overcome many early issues.

VAWT = vertical axis wind turbine

HAWT = horizontal …