Hydraulically driven by 2 electric pumps with a 7 second transit.
Yes, feathering locks engage at 800 RPM on the Seneca.
We feather to stop windmilling and reduce drag.
No, you mechanically change a valve that changes the air intake to air that runs past the exhaust manifold and is therefore heated.
If you pitch up in a Seneca the speed IAS will decrease, because of the constand speed drive (in the propeller hub).
The propellers want to maintain the original RPM. Therefore the blades will go to a more fine blade setting.
No, Seneca has a fuel injection system which doesn’t suffer from vapour icing.
Live side to oppose the yawing moment.
No, it’s not required as the Seneca has a fuel injection system and engine icing normally forms around the venturi of the carb.
Ice can still form in in a fuel injection system in icing conditions, an alternate air source is available in this situation which takes warm air from inside the engine cowling.