Otherwise the stick tends to flop over, generally resulting in very expensive noises once the rotors are turning.
unless of course,
ProfessionalStudent, you keep hold of it....
..... as earlier generations who had the doubtful privilege of flying (or even
operating) the Whirlwind, will recall. (for the OP, Whirlwind had no "feel" and no self centring on its controls. Just some dodgy friction devices which were almost universally ignored)
NB Teeters is old enough to have flown the Whirly, but
not old enough to have operated it.
