---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Sun 11/27/11: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 0. 12:17 AM - Please Make A Contribution Today... (Matt Dralle) 1. 02:43 PM - charging system (steve feigley) 2. 02:51 PM - Re: charging system (Pete Christensen) 3. 03:04 PM - Re: charging system (Pete Christensen) 4. 03:18 PM - Re: charging system (Peter Jeffers) 5. 04:01 PM - Re: charging system (Gilles Thesee) 6. 04:20 PM - Re: charging system (Craig Payne) 7. 04:21 PM - Re: charging system (Guy Buchanan) 8. 06:24 PM - Re: charging system (rampil) ________________________________ Message 0 _____________________________________ Time: 12:17:38 AM PST US From: Matt Dralle Subject: RotaxEngines-List: Please Make A Contribution Today... Dear Listers, A quick reminder that November is the annual List Fund Raiser and the List of Contributors is quickly approching. The Matronics Lists are 100% member supported and all of the operational costs are provided for by your Contributions during this time of the year. Your personal Contribution makes a big difference and keeps all of the Matronics Email Lists and Forums completely ad-free. Please make your Contribution today to keep these services up and running! http://www.matronics.com/contribution or by dropping a personal check in the mail to: Matt Dralle / Matronics 581 Jeannie Way Livermore CA 94550 Thank you in advance! Matt Dralle Matronics Email List and Forum Administrator ________________________________ Message 1 _____________________________________ Time: 02:43:53 PM PST US From: steve feigley Subject: RotaxEngines-List: charging system hey guys' this is for the electronics types listening . I'm thinking of trying a lithium ion type battery for my 912s for the considerable weight savings. the battery calls for a charge rate of no more than 18 amps the 912 specs its elec. output at 20 amps. does this nessesarally mean that it charges at that rate? also have any of you tried one of theese batt, if so which brand from where? ________________________________ Message 2 _____________________________________ Time: 02:51:40 PM PST US Subject: Re: RotaxEngines-List: charging system From: Pete Christensen Are you going to make up the battery yourself or use one made for aircraft? Y ou can blow a couple hundred bucks in a heartbeat if you over charge one. Pete Sent from my iPad On Nov 27, 2011, at 4:40 PM, steve feigley wrote: > hey guys' > this is for the electronics types listening . I'm thinking of trying a lit hium ion type battery for my 912s for the considerable weight savings. the b attery calls for a charge rate of no more than 18 amps the 912 specs its ele c. output at 20 amps. does this nessesarally mean that it charges at that ra te? also have any of you tried one of theese batt, if so which brand from wh ere? > > ========================== ========= ========================== ========= ========================== ========= ========================== ========= ========================== ========= > ________________________________ Message 3 _____________________________________ Time: 03:04:38 PM PST US Subject: Re: RotaxEngines-List: charging system From: Pete Christensen U-Fly-It advertises one they say is more or less a drop in replacement for y our regular battery and will charge off your existing alternator/ regulator. Pete On Nov 27, 2011, at 4:50 PM, Pete Christensen wrote: > Are you going to make up the battery yourself or use one made for aircraft ? You can blow a couple hundred bucks in a heartbeat if you over charge one. > > Pete > > > Sent from my iPad > > On Nov 27, 2011, at 4:40 PM, steve feigley wrote: > >> hey guys' >> this is for the electronics types listening . I'm thinking of trying a li thium ion type battery for my 912s for the considerable weight savings. the b attery calls for a charge rate of no more than 18 amps the 912 specs its ele c. output at 20 amps. does this nessesarally mean that it charges at that ra te? also have any of you tried one of theese batt, if so which brand from wh ere? >> >> >> > > > ________________________________ Message 4 _____________________________________ Time: 03:18:10 PM PST US From: "Peter Jeffers" Subject: RE: RotaxEngines-List: charging system Weight saving is a good thing but be cautious of what reduced weight could do to your weight and balance. I know of at least one person who was going to fit one of these batteries and then discovered that he needed ballast to correct the c of g. Pete _____ From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Pete Christensen Sent: 27 November 2011 22:51 Subject: Re: RotaxEngines-List: charging system Are you going to make up the battery yourself or use one made for aircraft? You can blow a couple hundred bucks in a heartbeat if you over charge one. Pete Sent from my iPad On Nov 27, 2011, at 4:40 PM, steve feigley wrote: hey guys' this is for the electronics types listening . I'm thinking of trying a lithium ion type battery for my 912s for the considerable weight savings. the battery calls for a charge rate of no more than 18 amps the 912 specs its elec. output at 20 amps. does this nessesarally mean that it charges at that rate? also have any of you tried one of theese batt, if so which brand from where? ________________________________ Message 5 _____________________________________ Time: 04:01:46 PM PST US From: Gilles Thesee Subject: Re: RotaxEngines-List: charging system steve feigley a crit : > hey guys' > this is for the electronics types listening . I'm thinking of trying a > lithium ion type battery for my 912s for the considerable weight > savings. the battery calls for a charge rate of no more than 18 amps > the 912 specs its elec. output at 20 amps. does this nessesarally mean > that it charges at that rate? also have any of you tried one of theese > batt, if so which brand from where? > > * > * Hi Steve, What is the weight saving expected from the change ? The 912S starts and runs very well with a 2,7 kg SBS8 Hawker lead-acid (VRLA), so is the gain really worth the $ and trouble ? Some info here http://contrails.free.fr/elec_bat_rg.php (mostly in French, I'm afraid ;-), with lots of documentation at the bottom of the page. Best regards, -- Gilles http://contrails.free.fr ________________________________ Message 6 _____________________________________ Time: 04:20:47 PM PST US From: "Craig Payne" Subject: RE: RotaxEngines-List: charging system Note that the batteries offered by U-Fly-It are lithium iron phosphate (LiFePO4), not the more common lithium cobalt oxide batteries (LiCoO2). Other types of lithium ion batteries need to be carefully charged to prevent thermal run-away, rupture and possibly a fire. This is one reason why there are not drop-in lithium ion replacements for conventional battery sizes like AA, C, D, etc. http://www.uflyit.com/new_page_57.htm http://en.wikipedia.org/wiki/Lithium_iron_phosphate_battery http://en.wikipedia.org/wiki/Lithium-ion_batteries#Safety_requirements -- Craig From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Pete Christensen Sent: Sunday, November 27, 2011 3:03 PM Subject: Re: RotaxEngines-List: charging system U-Fly-It advertises one they say is more or less a drop in replacement for your regular battery and will charge off your existing alternator/ regulator. Pete On Nov 27, 2011, at 4:50 PM, Pete Christensen wrote: Are you going to make up the battery yourself or use one made for aircraft? You can blow a couple hundred bucks in a heartbeat if you over charge one. Pete Sent from my iPad On Nov 27, 2011, at 4:40 PM, steve feigley wrote: hey guy s' this is for the electronics types listening . I'm thinking of trying a lithium ion type battery for my 912s for the considerable weight savings. the battery calls for a charge rate of no more than 18 amps the 912 specs its elec. output at 20 amps. does this nessesarally mean that it charges at that rate? also have any of you tried one of theese batt, if so which brand from where? 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= 3D ________________________________ Message 7 _____________________________________ Time: 04:21:09 PM PST US From: Guy Buchanan Subject: Re: RotaxEngines-List: charging system On 11/27/2011 2:40 PM, steve feigley wrote: > this is for the electronics types listening . I'm thinking of trying a > lithium ion type battery for my 912s for the considerable weight > savings. the battery calls for a charge rate of no more than 18 amps > the 912 specs its elec. output at 20 amps. does this nessesarally mean > that it charges at that rate? also have any of you tried one of theese > batt, if so which brand from where? I like the idea that if you have a particular type of charging failure your battery catches fire. I understand it's a rather hot fire too. Always exciting. Guy Buchanan Ramona, CA Kitfox IV-1200 / 912-S / Warp 3cs / 500 hrs. and grounded Now a glider pilot, too. ________________________________ Message 8 _____________________________________ Time: 06:24:47 PM PST US Subject: RotaxEngines-List: Re: charging system From: "rampil" I also agree that the incentive to use an "exotic" battery for a Rotax starter must be minimal. The Rotax requires only a small lead-based battery, not much weight saved compared with what's required for spinning up a TIO550! The reference articles provided note that LiPo batteries don't overheat (the old Halt & Catch Fire command) like LiCo, but do they just die quietly when overcharged like LiCo? If you're not expert enough to completely understand the engineering considerations in switching, I'd leave to someone else to be first. Ira (EE in a former life) -------- Ira N224XS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=359512#359512 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.