Because of the shape of the blades near the boss and the larger size of the boss itself, there is a small loss of efficiency compared with fixed-pitch propellers at high speed.
Ngenxa yobume babesudlo semela esikufutshane nomphathi nobungakanani bobukhulu uqobo, kukho ilahleko encinane yokwanelisa ethelekiswa neyesiqhubi kwisantya esiphezulu.