We have 1 engined planes, 2 engined planes, and 4 engined planes.
Historically the engines were numbered (for 1+ planes) port side first then in order going to starboard side.
P38 for example has #1 on port #2 on starboard.
B17 for example has #'s 1 & 2 on port (outboard, inboard) and #'s 3 & 4 on starboard (inboard, outboard).
I was thinking about some folks that have dual throttles or dual setups for twin-engined planes. Specifically I was thinking of some setups described for use with the P38 (on these forums). I recall wondering how the heck these folks would ever be able to fly a bomber without a lot of remapping of axes on their inputs.
How about an optional checkbox in the hardware setup that says "switch to port/starboard for 4 engines?" so that your throttle1 now works on eng 1/2 and throttle2 works on eng 3/4?
Same for RPM settings.