Important bits on a Caravan 

Thanks mate! Haha, gotta love a bit of snark.

They're a great plane!

It’s my favourite plane IRL. The perfect combination of simplicity and capabilities.

Ah nice! That’s a survey machine I believe? Thanks!

Congratulations! That’s great to hear! They’re an amazing machine!

Thanks mate! I appreciate the feedback!

Thanks for the comment!

Thanks! Ok, I'll be sure to get onto some Caravan videos again soon!

Thanks for the feedback!

Mine too!

Thanks!

Low idle is 52% Ng, and high idle is 64% Ng. It isn't a "mixture" lever like in a piston, all it is doing is quite literally changing what Ng idle sits at (in much the same way as winding up the idle screw on a lawnmower). The reason for this is that the engine has to be able to go from idle to takeoff power within a certain timeframe, and at low idle it is not quite quick enough. So for flight, they give us high idle (Beechcraft call it flight idle, it's the same thing). They give us ground idle because it uses less fuel when taxiing around. Hope that helps!

Thanks! I have no idea. However, have just replaced it and it was a touch over $5k AUD this time!

You can, yes! However, because having the inertial separator open allows some air to escape, and therefore less power, then if we’re already at our torque limit during flight and shut the separator we can go over the torque limit. So we need of make sure the power is back below the torque limit before shutting it!

The popped ones that are collared are for the propeller deice that’s been removed, and also for a cineflex camera that used to be installed. The NO ELT placard has to be there if there is no fixed ELT. If that’s the case then here we need to carry a portable ELT for Part 135 operations, or any operation in a designated remote area. I hope that helps!

@@aeroplanetoby Great, thanks for sharing!

It’s actually a separate control to the pitch lever itself, because that’s actuated by oil pressure. Essentially the reverse linkages on the power lever allow the angle to go past the fine pitch stops, and then further reverse spools up the engine to provide “more reverse”, but at the same angle. I hope that makes sense!

The low pitch stops in the Caravan and other PT6s aren’t physical low pitch stops. It’s hydraulic by oil trapped in the hub via the beta valve. The beta valve can be moved to either let high pressure oil in from the governor pump or let it drain into the case via the combination of two things.. the reversing linkage and the feedback ring which both act on the beta arm like a teeter totter with the beta valve in the middle. The reversing linkage is controlled by the reversing cam which does nothing as the power lever is moved in the forward range but engages as the power lever is brought into the beta range. It pulls the beta linkage and opens the beta valve to add more oil to the hub.. and as the prop moves towards reverse the beta feedback moves to close the beta valve. This balancing act allows us to set the low pitch stop of the prop wherever we want to.

You are absolutely correct! Thanks for that, well spotted!