V3.7.1:QuadPlane the vertical motor does not work

Hi , I’m a new user to QuadPlane . I ran into a problem when I was testing . First of all I removed all the propellers . Then l arm the plane on Qhover mode , and push a little throttle to start four horizontal motors . Finally , l blow into the airspeed sensor to make them stop , but the vertical motor does not work , why ? Can l simulate the transition from the quad to the fixed wing like this?

I would greatly appreciate if anyone can assist . Thank you .