Lee Logan
Joined: 10 Jan 2006
Posts: 86
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 Posted: Fri Jul 04, 2008 4:29 pm Post subject: AeroElectric-List Digest: 29 Msgs - 07/03/08 |
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Bob, you made a point yesterday, that I had not thought through. I do not have an electrical/charging/output performance card in my flight test deck. I do of course, have operational performance checks planned on all my avionics, but I don't have a specifice plan for checking out the performance of my "as designed" electrical system (not flying yet).
Wonder if you or anyone else can recommend specific flight test procedures to accomplish a reasonable system test in a sequenced and logical form? My system is all electric with a Plane Power 60 amp, internally regulated main alternator, an SD-8 backup, all wired a la Z-13/8 with "auto excitement" of the SD-8. I have an EDM-900C engine monitor with voltage and amperage readings and the B&C BC207-1 over/under voltage sensor (not yet wired up). Any recommendations as to wiring changes that might facilitate the above would also be appreciated.
BTW , I don't see over/under voltage detection or indications on schematics for the SD-8 typically. Is the expectation that the BC207-1 will provide adequate early warning of main alternator failure and that then battery and SD-8 power will be adequate for any reasonable endurance bus/fuel remaining scenario---such that further warning that the SD-8 has failed too is considered an unnecessary complication?
If the SD-8 failed after the main alternator had already failed on my aircraft, my battery (Odyssey 925) is the final arrow in the quiver. The 925 is a monster though and personally, I would already be headed for good weather/divert/home base/whatever if the SD-8 let go. I don't think I need another warning system, but thought I'd ask the group. What's the consensus thinking on this one?
Thanks in advance!
Lee...
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