("nrp" wrote)
Also - check the prop blade resonant frequency in the flapping mode
without the engine running, hitting it at a tip with the tip of your index
finger.

You might be able to hear it with your ear.


Oh good. You formed my question for me.

I was wondering if there were any old tricks/shortcuts used back in WWI or
WWII? Or even in the old barnstorming days - out next to someones ...barn?

Not perfect fixes, but 'half-way to the wall' solutions.


Montblack