Yes Dwain, These are the deep cycle 31's. They have been used in a rew of the past projects ranging from the Gem NEV to our 'lectric Range Rover when it was featured in the Discovery Channel's Mean Green Machines series (Red Rock Rumble episode). (They have been stored on a shelf in my shop for the past 2 years waiting for a project.)
-Tom On Fri, Jan 17, 2014 at 12:57 PM, Dwain Swick <[email protected]> wrote: > I to have enjoyed this thread as for several years, I designed and built a > lot of aircraft and trailer tugs. Tugs ranging from a small tug to move a > single engine aircraft to a tug to move an F18 fully loaded ( 60,000 lbs.). > I learned early on, traction became an issue. The tractor weight affected > the drawbar capability. Your tractor needs to weigh more than the required > pounds of drawbar. The drawbar needed to pull the F18 was 5000 pounds. > Lead acid batteries are a plus in this situation. > If you are going to pull tillage tools, drawbar will be important. If you > are going to mow the yard, drawbar won't be so important. > The use of a tractor usually is a long steady pull. Unless the group31 > batteries are deep cycle, they won't last very long in that usage, > especially if they are high output batteries. Deep cycle batteries in the > same size case usually weigh a little more. Your layout for your Yanmar > tractor makes sense. Just don't skimp on the solenoids or contactors used > to control direction. Remember they must carry the full load for an > extended time. Just pay attention to the amp load rating. > Good luck on your project. > Dwain Swick > Kansasev.com > > > > > > > >________________________________ > > From: Thos True <[email protected]> > >To: Electric Vehicle Discussion List <[email protected]> > >Sent: Friday, January 17, 2014 1:15 PM > >Subject: Re: [EVDL] Electric Tractor for a Farm... > > > > > >Hi Marco, > > > >I have been watching this thread with a fair amount of interest, as I have > >an older Yanmar 187-D that I inherited from my parent's farm. It has only > >200 hours on it, but was plagued by constant issues with the safety > >interconnects (mostly because it was never garaged, I believe). The power > >plant is a 3 cylinder diesel, so we had planned on using a conventional 8" > >advanced DC motor, or equivalent (thinking salvage from an old forklift- > >possibly along with the industrial controller) Had planned to run it at > >48-72 volts using group 31 batteries (I have about a dozen left over from > a > >previous project), then swapping to lithiums when some older ones come > >through that need to be re-purposed. Another thought that occurred to us > >was to use an alltrax controller (inexpensive & robust) if the industrial > >unit was not viable. > >The tractor has been sitting as a future project that was initially set > >aside when the economy took a dive, and stayed put as my Dad's health > >declined (the plan was to do it as another one of our father-son > projects). > >The adc puts out about 20hp, but do not be confused by the rating, as the > >torque is roughly equivalent to that of a small block V-8 (I have put a > few > >in car conversions that have performed well against nicely built street > >machines!). > >Over the past few months, I have been concentrating on cleaning out or > >completing several of my unfinished projects, and have caught myself > >looking wistfully at the tractor project that sits alongside my old > >carport. My son has asked when we are going to do something with it, so I > >am thinking that the spring is looking to be good for this idea. > >I want to thank you for bringing the topic to this forum. > > > >-Tom True > > > > > >On Fri, Jan 17, 2014 at 11:36 AM, EVDL Administrator <[email protected] > >wrote: > > > >> On 16 Jan 2014 at 8:11, Ing. Marco Gaxiola wrote: > >> > >> > Actually I haven't thought about the batteries, range and > >> > chargers, I've focused only in the motor issue. > >> > >> I recommend that you rather decide what kind of battery you need first. > >> Choose on its ability to deliver power and operating time. Then, choose > >> the > >> motor and controller that suit the battery. > >> > >> David Roden - Akron, Ohio, USA > >> EVDL Administrator > >> > >> = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > >> EVDL Information: http://www.evdl.org/help/ > >> = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > >> Note: mail sent to "evpost" and "etpost" addresses will not > >> reach me. To send a private message, please obtain my > >> email address from the webpage http://www.evdl.org/help/ . > >> = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > >> > >> > >> _______________________________________________ > >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > >> http://lists.evdl.org/listinfo.cgi/ev-evdl.org > >> For EV drag racing discussion, please use NEDRA ( > >> http://groups.yahoo.com/group/NEDRA) > >> > >> > > > > > >-- > >Remember, it is not that the glass is half empty, in reality, the glass is > >merely twice the size that it needs to be! -TNT'82 > >-------------- next part -------------- > >An HTML attachment was scrubbed... > >URL: < > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140117/8f3b156b/attachment.htm > > > >_______________________________________________ > >UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > >http://lists.evdl.org/listinfo.cgi/ev-evdl.org > >For EV drag racing discussion, please use NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > > > > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140117/88be5cb1/attachment.htm > > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -- Remember, it is not that the glass is half empty, in reality, the glass is merely twice the size that it needs to be! -TNT'82 -------------- next part -------------- An HTML attachment was scrubbed... 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