Landwhere,
You may be right that it was not enough time under the circumstances. I do not know and I did say 'should'.
It has been enough time for others, but maybe the conditions were different.
Bear in mind that the first sign of a throttle chop is not the horn, it is the violent yaw which often comes as shock to Robbie pilots as they do not practice chops.
you said:
you have obviously never experience all the bells and whistles.
I have had an engine stop in flight in an aircraft without a horn. You dont need one to know its stopped!