Originally Posted by
Ed_Moorman
Harvey,
My twin time was what the USAF called "center line thrust."
Ed
Now you're talking my language! I used to own a '67 Cessna 337B (the civilian version of the O-2 that you flew in the USAF).
Out-of-sync engines in full-scale planes can produce destructive harmonics that can reduce crankshaft bearing life, cause fatigue cracks in engine mounts, weaken solder joints in avionics, shorten light bulb life, etc. Of course, these problems are generally worst-case scenarios and are not common; but then again, maybe that's because full-scale multi pilots are taught to always keep our engines in sync.
Harvey