Coyote Chris
Site Supporter
Lycoming Aircraft Engines has just issued some interesting information on winter and cylinder wall corrosion.....
According to Lycoming "Our experience has shown that in regions of
high humidity, active corrosion can be found on cylinder walls of new
engines inoperative for periods as brief as two days. In engines that
have accumulated 50 hours or more time in service in a short period,
the cylinder walls will have acquired a varnish that tends to protect
them from corrosive action; such engines under favorable atmospheric
conditions can remain inactive for several weeks without evidence of
damage by corrosion. Aircraft operated close to oceans, lakes, rivers
and in humid regions have a greater need for engine preservation than
engines operated in arid regions."
Conversely, for those engines subject to moderate amounts of blow-by
and relatively high oil consumption, accumulating moisture and acid in
the oil is a given, regardless of how often the aircraft flies.
In some respects, we can do only so much to keep the damaging impact
of corrosion to a minimum, but some form of storage should be
considered when limited operation and frequent periods of downtime are
expected. This would also be applicable to engines removed from the
aircraft awaiting reinstallation.
Click here to read the full article.
(http://www.avweb.com/news/redundant/storing_your_airplane_for_winter_207881-1.html)
http://www.avweb.com/eletter/archives/avflash/2399-full.html#207881
According to Lycoming "Our experience has shown that in regions of
high humidity, active corrosion can be found on cylinder walls of new
engines inoperative for periods as brief as two days. In engines that
have accumulated 50 hours or more time in service in a short period,
the cylinder walls will have acquired a varnish that tends to protect
them from corrosive action; such engines under favorable atmospheric
conditions can remain inactive for several weeks without evidence of
damage by corrosion. Aircraft operated close to oceans, lakes, rivers
and in humid regions have a greater need for engine preservation than
engines operated in arid regions."
Conversely, for those engines subject to moderate amounts of blow-by
and relatively high oil consumption, accumulating moisture and acid in
the oil is a given, regardless of how often the aircraft flies.
In some respects, we can do only so much to keep the damaging impact
of corrosion to a minimum, but some form of storage should be
considered when limited operation and frequent periods of downtime are
expected. This would also be applicable to engines removed from the
aircraft awaiting reinstallation.
Click here to read the full article.
(http://www.avweb.com/news/redundant/storing_your_airplane_for_winter_207881-1.html)
http://www.avweb.com/eletter/archives/avflash/2399-full.html#207881