"In digital mode using Shift 1 and shift 2 with the Keypad plus and minus"
Check
I went back into the game and found the following.
Shift engine# indeeds works for on/off. it does not work for RPM.
The RPM gauges do not work in Keyboard mode. also the RPM controls do not respond individually in keyboard mode. I can only surmise that we cannot feather 1 prop in keyboard mode without affecting all of the others. The RPM controls do respond when coupled with a rotary input.
Another problem I found was with the Mossie. looks like a graphics problem with the throttles. The controls do not separate with a multi engine throttle (this in analog mode). I am not sure of other aircraft as I only tried the B-25, P-38 and Mossie.
Infidelz.