912 Engine settings
in General Tech Discussion
10 years ago
The Service Letter SL-912-016 gives interesting indications to avoid the risk of overloading the engine.
Among them there is one that I do not understand.
The point 3 of par. 3.1.2) Performance recommendations says that during continuous running the RPM should not be lower than 5200 when in wide open throttle (WOT) conditions.
Flying at 3500 ft I realized to be in WOT conditions getting 26.5 MAP (I own a 80HP 912).
My question is: should I follow the SL indication and set 5200 RPM with my variable pitch prop, being in WOT conditions, or should I follow the Operating Manual and set 4800 RPM?
In both cases I am in WOT conditions. In the case of 4800 RPM I would get about 65% of the power, while at 5200 I get about 75%.
Should the Service Letter setting prevail on the Operator Manual as the latter seems to imply an overloading condition?
I am really confused.
Not to mention the case of fixed pitch prop: how can we set 5200 rpm in WOT conditions as we cannot change the pitch?
Many thanks
Zeb
Among them there is one that I do not understand.
The point 3 of par. 3.1.2) Performance recommendations says that during continuous running the RPM should not be lower than 5200 when in wide open throttle (WOT) conditions.
Flying at 3500 ft I realized to be in WOT conditions getting 26.5 MAP (I own a 80HP 912).
My question is: should I follow the SL indication and set 5200 RPM with my variable pitch prop, being in WOT conditions, or should I follow the Operating Manual and set 4800 RPM?
In both cases I am in WOT conditions. In the case of 4800 RPM I would get about 65% of the power, while at 5200 I get about 75%.
Should the Service Letter setting prevail on the Operator Manual as the latter seems to imply an overloading condition?
I am really confused.
Not to mention the case of fixed pitch prop: how can we set 5200 rpm in WOT conditions as we cannot change the pitch?
Many thanks
Zeb
