Lights on C119 Hamilton Standard Prop

[acpilot]

How about as nighttime indicators of a feathered propeller?

 

[tomgoodman]

How about as nighttime indicators of a feathered propeller?

Or, if you can count really fast, as a standby RPM indicator.

 

[acpilot]

Or, if you can count really fast, as a standby RPM indicator.

Yeah, yeah...at this point, I'm just throwing things to see if they stick.

 

[lindsaya99]

Really reaching here but maybe they light up the spinning prop so the ground crew won't walk into it at night.