I’ve done a fair amount of flying with the DC-6 and run through the checklists myself, so I’m not totally new to its systems.
That said, I’m in the midst of Run-Up and I cannot get #1 to respond to any sync input whether that is via the propeller sync lever, or via the individual sync switch for #1. No matter what I do it remains at a fixed RPM and the light stays blue.
It was able to reverse when performing that test, so some part of its mechanism is operating.
I’ve checked the breakers, but none were tripped. Regardless, I cycled them and see no change.
I even went to the maintenance manager on the tablet and reset all the maintenance, but that made no difference either.
I even unmapped my propeller axis keybind.
I’m on SU8 beta, if that makes any difference (but I doubt it).
Anyone have any ideas as to what I’ve missed here? If you have a full on “failure” do you have to basically call off the flight as if the aircraft had to go in for service?
Ok, weird. I put everything back to idle. Engaged reverse, moved #1 into reverse and back to idle, then put it back to 1500 RPM and now it is responding to the propeller controls.
I don’t get it.
Glitch?
Could be a glitch. I remember once I had something similar and a restart of the flight sorted it out.
I’ve had them get partially feathered before and pulling the feather buttons fixes them. Could have been the issue.
I had a stuck pitch prop mid flight the other day & that one went in reverse on landing, so maybe there’s some oddness still. That’s on SU7 also. Interesting tip on the feather buttons, will try that.
If three engines are enough & you can feather the other one, then just ignore the failure 
or leave it idling if it won’t feather. ( If you’re bush flying, anyway…)
Maybe this can help:
- MALFUNCTIONING HAMILTON STANDARD PROPELLER
The circuit breakers in the propeller circuits are located at the top of the center panel of the main circuit breaker panel, and must be set at all times.
10.1. INDIVIDUAL PROPELLER OUT OF SYNCHRONIZATION
(1) Push the resynchronizing button.
(2) If this does not correct the condition, actuate the respective propeller control switch to bring the propeller back into synchronization.
(3) If the propeller does not stay in synchronization after being brought back, place the propeller synchronizer selector switch in the opposite inboard engine position and push the resynchronizing button.
(4) If the propeller still will not stay in synchronization, place the propeller synchronizer selector switch in the “MANUAL” position and operate individual propeller control switches for synchronizing and change of rpm.
10.2. ALL ENGINES HUNTING OR SURGING
(1) Place the propeller synchronizer selector switch in the opposite inboard engine position.
(2) If this does not correct the condition, place the propeller synchronizer selector switch in the “MANUAL” position.
(3) If either inboard engine must be feathered, make certain that the propeller synchronizer selector switch is placed in the opposite inboard engine position before starting to feather.
10.3. PROPELLER OVERSPEEDING—Immediately perform the following steps:
(1) Close all throttles and decrease speed below 139 KIAS as rapidly as possible.
(2) Place mixture control of runaway engine in “IDLE CUT-OFF.”
(3) Feather runaway propeller.
(4) Speed may be resumed after propeller becomes stationary.
(5) In a high rpm windmilling condition, passengers should be moved aft of the plane of propeller rotation. A high rpm windmilling condition may be partially restored to normal by descending to a lower altitude, inasmuch as the propeller windmilling characteristics are a function of true airspeed.