Vertical power question

[Kitfox Pilot]

Thanks Gary, I have that downloaded and I guess I just didn't see it cause I thought I looked through it but glad you found it for me. I would love to see how you have it laid out because wiring this plane is Greek to me and I barely speak English. Haha
I think I have most the garmin 900 page download figured out and most of the vertical power is pretty simple but the 915 part is just not clear to me. Thanks again Gary.

edit added, on the third alt your talking about adding in case the number 2 quits, I thought your battery and backup battery would keep the screen and autopilot stuff going for a while?

[Geek]

........edit added, on the third alt your talking about adding in case the number 2 quits, I thought your battery and backup battery would keep the screen and autopilot stuff going for a while?

In theory it should. The TCW Battery Back Up says it will and the one I think Kitfox recommends is the 6amp hour so it depends on your load as to how long it keeps things going and if I remember it does have some limitations. My first cut at my loads had my system running pretty much the higher end of the 28 amp alternator if I had everything on and I am using the heated pitot tube which was a big dog in current draw (remember I haven't wired it yet and done the final system - I was and am still, working with a paper system). I don't like running electrical at the higher end of capabilities. My desire to put in the third alternator comes from my dislike of the Rotax system that can take your alternator from you on its own. Major part of my flying experience comes from flying with the Navy and my experience there was if things went South, it was at the worst time (dark and at the back end of the boat) and when you really wanted systems that the boldface checklist was telling you to shut down so my perspective is slightly biased there. I think you're right in the belief that the battery back up and battery itself will at least let you find a place to land and get a beer while you sort it all out.

I think Dustin had an issue with his electrical once but couldn't find it to reference with a quick look. Maybe he will chime in on why he too added the additional alternator. My recollection of his issue was there was a failure and he had to shut some systems down to shed the load. Again my recollection was his third alternator was his primary and the 28Amp Rotax was his backup. No big deal but with the third alternator, if the Rotax engine alternator dies and it takes the second alternator to keep that important fan working out there, I don't care other than maybe having more time to find a place with a better selection of beer.

I have most of my system drawn up. When I get home, I'll send them to you to peruse.

G

[Geek]

.........

I have most of my system drawn up. When I get home, I'll send them to you to peruse.

G

Harlan - I got home and took a look at my 'system' again and realized that it was not quite right. I have learned stuff that I hadn't edited into the system drawings so am afraid they would mess you up more than help. I did look at the TCW Battery Back Up wiring and think that is still good so I have attached what I think I am doing. You can see the Aircraft Power 1 pins of the units are all going to the Vertical Power for control and the Aircraft Power 2 pins are where I connected the TCW. With what I have connected, the load is 4.5A. If you give the TCW credit for the advertised 6AHr rating, you'll have a little over an hour of power.

G

TCW Battery Back Up Wiring-A.jpg