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Ken Potter
Joined: 18 Aug 2007
Posts: 85
Location: Lanark, Ontario
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 Posted: Sun Mar 16, 2008 3:44 am Post subject: Rotax 582 Alternator |
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Hi Folks;
I am currently wiring my Kitfox II which has a Rotax 582 with internal alternator. I would like to install an Alt/Bat split switch but cannot figure out which wire coming out of the alternator to the regulator is the field wire. Can anyone help me out??
Cheers
Ken
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dave
Joined: 22 Sep 2006
Posts: 1382
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| Posted: Sun Mar 16, 2008 5:26 am Post subject: Re: Rotax 582 Alternator |
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Ken,
You should have 2 yellow wires, one will have a black stripe. these are both AC voltage and go to your regulator. The regulator is also a rectifier which converts AC to DC. Although I am a Rotax dealer , I would suggest that a Key west regulator is a better option fora more constant voltage and liklley a cleaner voltage.
1-866-418-4164 toll free
http://www.rotaxservices.com/
If you order ,tell Bob you came from this site.
They will be some give-a-aways to web traffic there soon.
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Ken Potter
Joined: 18 Aug 2007
Posts: 85
Location: Lanark, Ontario
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| Posted: Sun Mar 16, 2008 5:58 am Post subject: Re: Rotax 582 Alternator |
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Thanks Dave;
I have the regulator installed with the two yellow wires as per the Rotax wiring diagram. Can I lead one of these wires to the alt switch and then back to the regulator??
Ken
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Float Flyr
Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland
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| Posted: Sun Mar 16, 2008 7:12 am Post subject: Rotax 582 Alternator |
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First of all the 582 strictly speaking has a magneto, not an alternator with a proper field coil, so it always puts out 100% the power it can for a given RPM. Personally I wouldn’t cut into the AC (Y/Bk tracer) wires going to the Rectifier/Regulator. You will find a heavier wire, probably red, which goes from the Rectifier/Regulator through the firewall to the main buss. That is the wire I'd cut the ALT switch into. To take pressure off the Rectifier/Regulator the only time I'd turn that switch off is when the engine is stopped, in an emergency or an overvoltage situation. Turning it off as a normal part of flight could damage the Rectifier/regulator.
The battery switch is another quintal of fish! Having a big wire running from your battery through this switch to the main buss and the starter is going to prove two things... An increase in weight (big wire) and a honkin' big current running through your panel. Neither of these are what I would call desirable. I installed a battery relay in my plane right at the battery. Doing this allows me to control the battery connection to the buss with a very low (2A could be 1A fused) current. It also allows me to isolate the whole of the electrical system from the battery in case of an emergency. Wiring a relay in is no big deal just make sure you get the relay like the ones they use for additional batteries in trailers and RVs NOT a starter relay. Starter relays will heat up in less than a minute. They both cost the low side of $10.00 They can be wired to activate with the control to ground or voltage positive to the control lug. I wired mine to activate with a ground (less wire) but with two small leads I could have wired it for a positive fused 1 or 2A fed directly from the battery. Doing it that way protects the battery from switching live in the case of a short circuit on the control line like is possible in a fire.
It’s good to be aware that the output of the 582 magneto is only 16A so it’s a good idea to keep a close eye on how much drain you put on it. Eg radios,T&B, Nav lights, Strobes and a GPS may not leave enough power to operate landing lights.
Finally do yourself a favour. Make a detailed drawing of exactly what you install. Where all the connectors, fuses,breakers and switches are. Yes it's a real pain in the butt to make one but if you ever decide to change or install something it will save you a lot of time and if you ever sell your plane...Wow!
[img]cid:image002.jpg(at)01C88762.AA835E60[/img]
Noel Loveys
Campbellton, NL, Canada
CDN AME intern, PP-Rec
C-FINB, Kitfox III-A
582 B box, Ivo IFA, Aerocet 1100 floats
[url=noelloveys(at)yahoo.ca]noelloveys(at)yahoo.ca[/url]
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Noel Loveys
Kitfox III-A
Aerocet 1100 Floats |
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Ken Potter
Joined: 18 Aug 2007
Posts: 85
Location: Lanark, Ontario
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| Posted: Sun Mar 16, 2008 2:04 pm Post subject: Re: Rotax 582 Alternator |
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Thank Noel;
I have already installed a battery relay (from Aircraft Spruce; pricey but certified) and am wiring the plane to accepted aircraft standards. Thanks for clarifying the nature of the "alternator" in the Rotax. I'll run the red wire through the alt switch and ensure that it is always on unless the engine is off.
As for the diagram, I've been following a generic diagram in Tony Gengelis's book Firewall Forward, with modifications for my individual loads. I have however been drawing it out as I install wires. As for loads, I have; nav lights, tip strobes, transponder, heater fan, Icom handheld radio, and Garmin 296 GPS. The GPS and the radio both have internal batteries and, even though they are being wired into the panel, they should not be a large load for the endurance the aircraft has.
I see from your pic that you are flying floats. I am interested in amphib floats but am concerned about the weight. Can you give me an idea about the performance you get from your plane on floats??
Cheers
Ken
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Float Flyr
Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland
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| Posted: Sun Mar 16, 2008 7:50 pm Post subject: Rotax 582 Alternator |
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The floats I have are Aerocet 1100s. They are a pretty slick glass float with a decently deep keel to smooth out a few small waves. They are available with Amphib gear but the amphibs are factory made not retro fitted. They tell me that just about the only thing better for the back woods are the Full Lotus floats but they are supposed to be draggy. Well this little bird is pretty draggy any way so I can’t see how that would hurt. A plus for the Full Lotus is they can be very effective on packed snow and ice... Apparently competing with skis.
As for fun the only thing that I got more of a thrill out of was a PA18 with the optional 180 Hp engine. The thrill there was the feeling of having all those horses cone to strain the reign. With two up we could have taken just about anything that would fit inside or be tied to the outside of the plane. The Kitfox is a great performer off the water but it is a smaller plane. Neither plane is going to break any speed records except maybe it's own. Conparing the planes the cub is a rough 4X4 Land Rover.. The ‘Fox is a dirt bike.
This winter I'm in the throes of swapping out my 582 grey head for a low time 912. That will probably cost me a few feet getting off the water but I should gain on climb which right now is just over 1000'/min at gross (950#) Of course the four stroke engine should be a little easier on the go juice too.
In summer of '09 I'm planning a true Trans Canada trip from ocean to ocean and return to commemorate Newfoundland being part of the Canadian confederation for sixty years. That is the reason for the engine swap to help get me through the mountains on the other side of the country.
Right now at gross weight (where I've been doing most of my flying) the plane is off in around ten seconds or less it lands in near glassy conditions in less than 500'. As i burn off fuel it lands and takes off even shorter.
About the only thing I can think of better for fishing is a canoe and the 'Fox is a bit too light to stick one on the struts. I think there is a guy on this list who used to carry a kayak on his plane... I may give that a try.
[img]cid:image003.jpg(at)01C887CC.C2EA6B00[/img]
Noel Loveys
Campbellton, NL, Canada
CDN AME intern, PP-Rec
C-FINB, Kitfox III-A
582 B box, Ivo IFA, Aerocet 1100 floats
[url=noelloveys(at)yahoo.ca]noelloveys(at)yahoo.ca[/url]
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Noel Loveys
Kitfox III-A
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