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Saber369(at)comcast.net
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 Posted: Sat Mar 02, 2019 2:09 pm Post subject: Desiccant experiment |
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Here's the quasi-experiment I conducted on the desiccant in the air system on my Nanchang CJ-6 airplane. This picture shows two things, desiccant quantity and humidity level. The pink desiccant on the left has reached the end of its useful life as a drying agent, while the desiccant on the right is new, deep blue and ready to absorb moisture. The next point is quantity...I use twice as much desiccant (left vs right) and half as many felt pucks (4 instead of 8] as most people. Here are the data: fresh desiccant was installed on 10 February and removed on 2 March to total 20 days. Total flight time was 5.9 hours flown between 14 - 27 February or over 4 days. Average high temp in Alabama for February 2019 was 64° and the average humidity was 67%. So the analysis and conclusion is two fold, first in this environment, deep South high humidity, changing the desiccant about every 5 hours seems to be about optimal and second, there might be a need for an additional inline filter or maybe even better, installation of a high pressure air filter and water separator such as on a scuba system or semi truck air system.
Has anyone installed an additional filter or water separator on their airplane? Results?
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dougsappllc(at)gmail.com
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| Posted: Tue Mar 05, 2019 3:12 pm Post subject: Desiccant experiment |
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Jon,The blue desiccant is not recommended because it contains Calcium Chloride which makes it somewhat corrosive. The orange desiccant is not corrosive.
Doug
On Sat, Mar 2, 2019 at 2:32 PM JON <Saber369(at)comcast.net (Saber369(at)comcast.net)> wrote:
| Quote: | Here's the quasi-experiment I conducted on the desiccant in the air system on my Nanchang CJ-6 airplane. This picture shows two things, desiccant quantity and humidity level. The pink desiccant on the left has reached the end of its useful life as a drying agent, while the desiccant on the right is new, deep blue and ready to absorb moisture. The next point is quantity...I use twice as much desiccant (left vs right) and half as many felt pucks (4 instead of 8] as most people. Here are the data: fresh desiccant was installed on 10 February and removed on 2 March to total 20 days. Total flight time was 5.9 hours flown between 14 - 27 February or over 4 days. Average high temp in Alabama for February 2019 was 64° and the average humidity was 67%. So the analysis and conclusion is two fold, first in this environment, deep South high humidity, changing the desiccant about every 5 hours seems to be about optimal and second, there might be a need for an additional inline filter or maybe even better, installation of a high pressure air filter and water separator such as on a scuba system or semi truck air system.
Has anyone installed an additional filter or water separator on their airplane? Results?
Sent from Xfinity Connect Application |
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http://www.matronics.com/Navigator?Yak-List |
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