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rmcmill(at)zoominternet.n
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 Posted: Thu Feb 14, 2008 10:36 am Post subject: batteries |
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any buddy ever tried a odyssey pc310 for starting a 912ul ?
[quote][b]
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Gilles.Thesee(at)ac-greno
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| Posted: Thu Feb 14, 2008 11:52 am Post subject: batteries |
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BOB MCMILLIN a écrit :
| Quote: | any buddy ever tried a odyssey pc310 for starting a 912ul ?
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Bob,
This 7 Ah battery physically resembles to the Hawker SBS 8 model.
300+ MCRs have been flying for years with an SBS 8. We are presently
flying and starting with an SBS 8 in our Rotax 914 MCR four seater. The
battery was bought in 2003...
See http://contrails.free.fr/elec_bat_rg.php in French at the time,
sorry 
Best regards,
--
Gilles
http://contrails.free.fr
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Roger Lee
Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.
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| Posted: Thu Feb 14, 2008 8:09 pm Post subject: Re: batteries |
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The PC310 is a good battery to use. It will work just fine on the 912uls. It is good for the type of use in an aircraft. You will be happy with that battery.
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_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056 |
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TheSchultzFamily(at)comca
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| Posted: Fri Feb 15, 2008 7:33 am Post subject: batteries |
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The 310 looks a little small if you really need to fly the plane on battery
power. I use the PC-680 with my 914 and it gives me good starting even in
really cold weather. I also like the extra power if I need to keep the fuel
pumps running should the electrical take a hike.
--
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Gilles.Thesee(at)ac-greno
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| Posted: Fri Feb 15, 2008 6:14 pm Post subject: batteries |
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Rich & Sandy Schultz a écrit :
| Quote: |
The 310 looks a little small if you really need to fly the plane on battery
power. I use the PC-680 with my 914 and it gives me good starting even in
really cold weather. I also like the extra power if I need to keep the fuel
pumps running should the electrical take a hike.
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Rich,
You're right about the need to fly on battery power.
What I did not mention is that I installed a second SBS-8 dedicated to
powering the aux pump.
This way I have really duplicated power supply to the pumps, and can
keep the engine running should the main circuit (regulator, alternator,
main battery) fail.
Best regards,
--
Gilles
http://contrails.free.fr
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Roger Lee
Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.
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| Posted: Fri Feb 15, 2008 6:31 pm Post subject: Re: batteries |
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The Hawker SBS-8 and the PC310 are made by the same company I believe. The SBS-8 is a little hard to come by and both batteries cost about $140. Be careful when talking about the 914 and the 912 as they do have some different requirements and needs. I am not sure if the battery is one of those items. You would need to consult the Rotax manual. That can be done online if you don't have one.
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_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056 |
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Gilles.Thesee(at)ac-greno
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| Posted: Fri Feb 15, 2008 6:47 pm Post subject: batteries |
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| Quote: | The Hawker SBS-8 and the PC310 are made by the same company I believe. The SBS-8 is a little hard to come by and both batteries cost about $140.
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Roger,
Interesting data about those two batteries.
| Quote: | Be careful when talking about the 914 and the 912 as they do have some different requirements and needs. I am not sure if the battery is one of those items.
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The alternator and charging system are the same in the 912 and the 914.
Some info on regulator tests here :
http://contrails.free.fr/elec_ducati_en.php
The 914 needs dual power sources in order to achieve redundancy, as
both pumps are electrical, making the engine "electrically dependent".
| Quote: | You would need to consult the Rotax manual.
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Better yet, the proposed architectures on http://www.aerolectric.com.
The diagram shown on the Rotax 914 manual do not provide real electrical
redundancy, considering the regulator poor service life record.
Best regards,
--
Gilles
http://contrails.free.fr
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hgmckay
Joined: 23 May 2006
Posts: 397
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| Posted: Sat Feb 16, 2008 4:18 am Post subject: batteries |
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I keep hearing about the poor service life of the standard regulator that is
provided by Rotax on their 912s. What is "poor service life" (i.e how long
does it last)?
Hugh McKay
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davidjoyce(at)doctors.org
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| Posted: Sat Feb 16, 2008 11:56 am Post subject: batteries |
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Gilles There is a form of redundancy in the 914 with a single battery. If
wired the Europa recommended way, one fuel pump is powered by the
alternator, with take off between the alternator and the alternator switch,
and the other is powered by battery power, downstream from the main
electrical switch. This means that with both main and alternator switch off
the engine keeps working. With the alternator shot or the regulator failed,
the other will work as long as battery life allows. Clearly you could be
struck by lightning and every wire burnt out but I suspect for most purposes
and eventualities one or other pump will continue to function
Regards, David Joyce, G-XSDJ
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