The Collings Foundation aircraft B-17, B-24, & B-25 flew into the Laconia NH Airport on Monday Sept 17. I was priviledged to be able to display my WWII USAAF Vehicles with them.
They had some "noise" coming from the Right Engine on the B-25 so the technician removed the shrouds and went to do some diagnostic work.
All I can say is this guy has big stones.

Yes that is the propellor rotating and engine running!
Bill