Mystery Vibration In The Queen Air! 

I always enjoyed using a Chadwick and a strobe light to balance props, we always did it at night time when it's cool outside and the results were always noticeable

Nothing like post annual maintenance issues.

I love epoxy floors! I learned a long time ago to NOT do the flake. It hides small parts that get dropped. Light gray, no flake is perfect!

So I learned a trick, a long time ago, when I dropped anything on the hangar floor. Take a flashlight with good batteries, and hold it just above to floor, aimed slightly down from parallel to the floor. Anything caught in the beam will not only be illuminated, but casts one hell of a shadow; works every time. I owned a '66 -88 presurized Queen Air. Had IGSO-540s. Great ride, but did it ever suck up the fuel. Had a Cessna 401 at the same time; far better fuel efficiency and speed. Guess which one I flew the most ? One other thing, don't rely on the mags being off, or the "P" leads to be unbroken. When you move a prop to reposition it, rotate it backwards. Got that one from my primary instructor in 1966; a WW2 TBM pilot. Your QueenAir looks like it's been reengined; what's under the cowlings ?

My thoughts exactly regarding the floor. A friend of mine that was an aviation mechanic in the US Air Force said that their hangar floors were white for those same reasons.

Hey Kerry, that totally sucks! I see you are heading to Minnesota for the avionics at Anoka, do you need a ride home? I was planning on heading over to Baldwin anyway. Good video, I am glad we were helicopter mechanics for the Army when we were 19 years old, it all comes back now that we have our own Army aircraft. When you come over, I will show you my 1946 " L-3G Grasshopper", my new army plane! See ya soon buddy!

An alcohol line is the reason that caused problems - well, if you ask a police officer, he will confirm that for sure from his daily business. 😛

shine a flashlight across the floor

Always get eye down to floor, cheek to floor, scan flashlite horz, you'll always see it...

Can I route a alcohol supply line to the cockpit?

Kerry, my Queen Air solves the problem you’re having with the alcohol tubes by using zip ties. I’ll get a picture.

So was it a wonderful flight or did a weird vibration show up that made you nervous and you didn't like it? Those seem like contradictory statements to me.

Is the alcohol prop system an anti-ice type that needs to be running before the ice builds up?

Maybe by now, a newer gen. Radar might be available used at a fair price? How about converting your anti-Ice from Alcohol to a newer Glycol system?

doesn't the alcohol eat the rubber boots? I thought alcohol and rubber did not get along?

I don't think that is your vibration...please follow up