DCS317(at)aol.com
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 Posted: Wed Sep 02, 2009 8:57 pm Post subject: What single failure of installed equipment prompts me to cha |
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Bob,
Sorry I sent two nearly identical posts earlier--I thought the first didn't go through.
You had asked:
"Have you had an experience that prompts you to make
this change? Recall that hundreds and perhaps thousands
of expensive GA aircraft are boring holes in lots of
clouds with Z12 installed . . . and even if Z12 were
NOT installed, they'd still be poking holes.
Are you planning on having independent, IFR capable
instrumentation installed on both pilot locations? That
was the original idea behind Z-14.
If not, what single failure of installed equipment
prompts you to believe that Z14 is more likely to
get you on the ground than Z12?"
1. I fly out of Seattle, and we have a lot of IFR days (some when the ice is just too daunting to leave the ground!). In August, on the way out of Puget Sound in IFR soup to VFR conditions east of the Cascades, I had no problems with my dual Cheltons. On the way back a week later in VFR conditions, I had a brownout of the Cheltons (first and only time in 235 hours). They began to reset in seconds, but took the usual two minutes to boot-up. I don't have a clue as to why the brownout. Prior to this flight I had sitting on my workbench a GRT Sport EFIS as a backup to the Cheltons and a Garmin GNS430W (both to be installed this Fall). I already have SL30, electric T&B and electric AH. I'm totally electric with the current Z12 (34 Ah Concorde AX35 battery). With the new gear and Z14 , I thought I'd put the Cheltons on one bus and the 430W and GRT Sport EFIS on the other bus using two Odyssey PC 680's--same weight as the one Concorde, and together same 34Ah, plus easier to replace in the boondocks.
2. A plus for the Z14 is the extra battery for starting (with the crossover) in my IO-540 RV- , but again similar Ah (one Concorde to two PC680's).
3. Just add a brownout battery to the Z12? Point me to your brownout battery diagram--I couldn't find it on your site. I've ordered your loadmeter to indicate loads on my Z12 alternators (or future Z14).
Any and all suggestions are greatly appreciated--I'm here to learn!
Many thanks,
Don
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