Solder melts in the 500F range as I recall, the tips of the motor could be quite a bit different temperature than the outer case or the area where the temp gage can get to. I tip mine until I get the highest temp and then try the other (back side) of the motor and repeat. I can control the heat build-up in the motor by very gradually applying throttle. If I spin the throttle to full most of the 200+ amps will turn into heat and I still won't get wheel spinning take-off anyway. Until WE find a nice small 2 speed trans, acceleration is going to be just less than a land speed record machine (okay not that bad) but when you gear for 60 MPH top the compromise in take-off is fairly significant. My bike weighs 430-440. I weigh 190. You do the math. I am not complaining by any means. Range is not an issue for daily use, and it is daily used, 5 out of 7 days, 4 of those 5 work days, gotta give my gas MC a little play. > >Sure thing on pictures. What I found is a decorative plastic surround that is >put on the ceiling for a hanging light fixture. I am thinking the plastic will >not melt until 300F. The center is open and will with a bit of modification >fit over the brush cover. Then mount the fans in a radial fashion. See >attached drawing (oops too big, message got bounced). > If you want a drawing of what I have planned for cooling the motor, you can email me a request: [EMAIL PROTECTED] (it is in .pdf format)
>Jeff > >-----Original Message----- >>From: Mike <[EMAIL PROTECTED]> >>Sent: Jul 18, 2007 7:54 AM >>To: ElectricMotorcycles <[email protected]> >>Subject: Re: [ElectricMotorcycles] Throw another Etek on the barbie >> >>>Did you mean 160F or C? I have read the latest temps after pushing >>>the PMG pretty heavily (200 down to >> >>Fahrenheit is what I'm pretty sure the thermo was set on but now >>you've got me wondering. Surely the solder that holds it all >>together can't melt at 160F? >> >> >>> 100 amps for some 20 seconds or so) and read 212F. I think the temp >>>sensor is a good idea, have one of the mini-eight fan assemblies on >>>the way. Found this pie-plate-looking thing at home depot that will >>>attach to the brush side of the motor and force cool air into the >>>motor and out of the shaft side of the >> >>Can you send us a picture of this pie plate gizmo? I think I'll >>order both the 8 fan assembly and a 'normal' fan for the next etek >>and experiment. >> >>Mike >> >>-- >> >>The Electric Motorcycle Portal >>http://www.electricmotorcycles.net/ >> >>Electric Motorcycle Listserv >>http://www.electricmotorcycles.net/listserv >>
