The 6.5 rating on that engine is at "wide open throttle" at the RPM tha produces peak power.
I don't know the power curve of that engine but its peak power speed is likely faster than you want to listen to, 6,000 RPM maybe. Your first step is to use the correct pulley ratio to let the engine run at its peak powerpoint. The next step is to implement some kind of automatic throttle unless you want to manually operate it. On Sun, Jun 27, 2021 at 4:44 AM fxkl47BF via Emc-users < [email protected]> wrote: > i'm gonna explain my screwup here because this group of folks has a very > diverse range of expertise. enough kiss'n up. if you know of a list that > would be more appropriate please let me know. > i've had a desire for some time to build a gasoline powered battery > charger. i've seen it done several times and thought no big deal. my first > thought was to use a 3 hp engine and a 100 amp one wire alternator. but > since i already had a 6.5 hp engine i decided to go with that and an > alternator like this > https://www.ebay.com/itm/NEW-CS130-ONE-WIRE-RED-ALTERNATOR-FOR-CHEVROLET-GMC-CHEVY-220-AMP-1-WIRE-1100665-/283190864732?hash=item41ef7dab5c. > i also added an ammeter like this > https://www.ebay.com/itm/301111474999?hash=item461ba47b37:g:hYUAAOxy4fVTEuR6 > . > i finished it and was ready to test. i pulled a big battery out of my > tractor, connected a 1000 watt inverter, and about an 800 watt load. i > cranked the engine and connected it to the battery. ammeter showed about a > 7 amp load. i switched on the inverter and it went to about 9 amps. i > switched on the load and it went to about 75 amps. the engine was > straining. i disconnected the the alternator from the battery so the load > could draw down the battery. after about one minute i reconnected the > alternator. the ammeter jumped to about 110 amps and it promptly stalled > the engine. i tried several times with the same results. > all of my feeble calculations led me to believe that a 6.5 hp gasoline > engine was more than enough to power a 220 amp 12 volt alternator. either > my 6.5 hp engine is more feeble than my brain or my calculations are way > off. > thanks for any feedback. > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
