Today's Message Index:
----------------------
1. 05:03 AM - Re: New Engine Noise? (Thom Riddle)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: New Engine Noise? |
Rich,
Since the sound is present only in a very narrow rpm range, there is a good chance
that it is due to something loose on the engine, as Paul stated. Remove the
cowling and (without the engine running), start at one corner of the engine
compartment and check EVERYTHING for the least bit of looseness.
If you don't find anything that might be causing this rattle, it could be the gearbox.
At that rpm, the prop is not loaded much so it could be simply the slight
rocking back and forth between the two gears which have a slight amount of
"backlash".
You can feel and hear the backlash I'm talking about by rocking the prop back and
forth (in turning direction and reverse) just a tiny bit. You should note a
very small movement at the tip of the blade, perhaps 1/4" or 1 cm at the most.
This is normal. Do not turn the prop backwards, just check the tiny bit of backlash
in the gears by rocking the prop back and forth.
--------
Thom Riddle
Buffalo, NY
http://riddletr.googlepages.com/sportpilot-cfi
http://riddletr.googlepages.com/a%26pmechanix
A complex system that works is invariably found to have evolved from a simple system
that works.
- John Gaule
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=238885#238885
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|