Coincidentally KK I have seen things not five minutes ago that really do make the nape-hairs stand up. Such a coincidence seeing your post about Old Warden nearby
Vibrational modes and resonances are very CPU-intensive physics but we need them for more and more realism, nothing wrapped around an engine is ever entirely motionless. Rolls Royce Phantom ok fair enough but never mind that now

You will believe that the SE5 has vibrational modes and not only that, the vibrational modes are distributed in bands as in a real aircraft's behaviour, proper resonances at different engine revs, jaw drops
Start the engine and turning over, you might see the wings buzzing quietly and the edge of the cockpit and seat would be vibrating. You crank the throttle up and you see the vibrations die away. Turn up the wick a bit more, another vibrational mode kicks in
Mighty PCs we're going to need for this engineer's dream of course. No pleasure without the promise of pain

Ming