baobab72
21st Sep 2012, 20:27
Hello everyone
maybe this topic has been treated in the past however i can not find it with the search function.
I would like to know what is that you check when performing a prop check in a single engine fitted with a constant speed propeller like the piper arrow, during the runup?
My educated guess that since in a sep oil pressure is used to increase the blade pitch angle, as the prop control is retarded towards the high pitch-low rpm position, you should notice a decrease in oil pressure as pressurized oil is fed into the governor; that the prop rpm's drop as the prop control is retarded as the pitch blade angle is increased resulting into an increase in aerodynamic load and thus in a decrease in rpm, and what else?
why do you set the rmp's to 1800-2000rpm's?
Many thanks
Baobab72
maybe this topic has been treated in the past however i can not find it with the search function.
I would like to know what is that you check when performing a prop check in a single engine fitted with a constant speed propeller like the piper arrow, during the runup?
My educated guess that since in a sep oil pressure is used to increase the blade pitch angle, as the prop control is retarded towards the high pitch-low rpm position, you should notice a decrease in oil pressure as pressurized oil is fed into the governor; that the prop rpm's drop as the prop control is retarded as the pitch blade angle is increased resulting into an increase in aerodynamic load and thus in a decrease in rpm, and what else?
why do you set the rmp's to 1800-2000rpm's?
Many thanks
Baobab72