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1. 05:12 PM - Re: Coalescing Filters (Walter Lannon)
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| Subject: | Re: Coalescing Filters |
I have been carrying N2 in the CJ 6 emergency air tank for a few years now.
Lose about 5 ATM per year at annual gear cycle with a quick top up of N2
=2E
Emergency pressure set to 50 with Normal (operating) system set to 47 so li
ttle to no chance of compressor air dilution. The numbers of course vary a
bit with changing OAT and ambient pressure but the ratio remains the same.
Easy to do; just charge with N2 with the main air valve closed. This char
ges the operating circuit and emergency tank but not the main tank.
On occasion have also started the engine after that charge with no problem
though that may not be the case with N2. only and some latent engine proble
m such as mis-primed, etc. Once all cylinders have been purged with N2 it
is probably not going to start.
Walt
From: Richard Romaine
Sent: Tuesday, January 29, 2019 3:12 AM
Subject: Re: Yak-List: Coalescing Filters
Realized by accident (duh) when I was chasing a slow leakdown, nitrogen ref
ills of the service tank are a low tech version of a supplemental air dryer
=2E Not sure of the cost effectiveness of regular nitrogen refills vs the
coalescing filter solution, though.
=2E..and my box stock 285 CJ doesn't seem to have any more issues engine st
arting on nitrogen than air.
Cheers,
Rich
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