John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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 Posted: Wed Jul 09, 2008 9:24 am Post subject: Strange Vibrations |
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Hi Gang:
Not long ago picked up an unidentified vibration, initially at cruise. I
could feel it in the rudder pedals. Figured I had dinged the prop or gotten
a blade out of phase (never had blade pitch on a Warp Drive migrate before).
Rechecked prop pitch on all blades. Checked out good. Not long after,
several flights, I got an unusual vibration at 1,900 to 2,000 rpm, just off
idle. This is an area that is usually very smooth. First noticed it during
a decent with the throttle closed and the rpm hanging around 2,000. On the
ground it was very annoying. Rechecked carb synch......OK. Still got the
vibration. Nothing changed. ;-( ???
Reset the fuel needles back to stock setting. During the process lost the
long lever on the choke actuator on the right carb. Never did find it, but
during the process of searching the inside of the cargo compartment (yes,
Miss P'fer was designed with a real cargo compartment) I discovered the fuel
tank had migrated to the rear and right making contact with a fuselage tube
brace. This morning I moved the fuel tank back where it belongs. Test
flight indicated my mysterious vibration had disappeared.  Now I am
happy again.
Travis Brown has ordered me a new lever from Bing which will be here
tomorrow so I can head out for LA first thing Friday morning. Thanks a
million, Travis. You be da man!!!
Take care,
john h
mkIII - Still flying and still learning new stuff every day.
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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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