dpansier
Well Known Member
My home constructed open loop engine dryer has been in use for over 1 year and I assume it provides a benefit but without the data, I’m just guessing.
The purpose of the test is to determine the residual humidity level after a 4 hour flow of dry air into the engine crankcase confirming the internals are staying dry between flights.
Engine dryer sequence of operation, high volume air for 3 minute purge to evacuate the wet air followed by 4 hours of filtered dry air.
A mattress type inflator provides the high volume purge air.
A aquarium pump provides the low volume dry air at 4 Lpm after passing thru desiccant beads and filter.
The temperature and humidity data was collected with a Elitech GSP-6 sampling at a 10 minute rate.
The temperature and humidity probes are attached to a plastic rod and cap allowing the sensors to be inserted into the dip stick tube about 1” above the oil level.
The cap seals tightly to the dip stick tube and also has a fitting allowing the passing of dry air into the engine.
Not shown in the graph, inserting the probe immediately after a flight shows a 98% humidity level in the crankcase.
The purpose of the test is to determine the residual humidity level after a 4 hour flow of dry air into the engine crankcase confirming the internals are staying dry between flights.
Engine dryer sequence of operation, high volume air for 3 minute purge to evacuate the wet air followed by 4 hours of filtered dry air.
A mattress type inflator provides the high volume purge air.
A aquarium pump provides the low volume dry air at 4 Lpm after passing thru desiccant beads and filter.
The temperature and humidity data was collected with a Elitech GSP-6 sampling at a 10 minute rate.
The temperature and humidity probes are attached to a plastic rod and cap allowing the sensors to be inserted into the dip stick tube about 1” above the oil level.
The cap seals tightly to the dip stick tube and also has a fitting allowing the passing of dry air into the engine.
Not shown in the graph, inserting the probe immediately after a flight shows a 98% humidity level in the crankcase.