Hi all, This is a bit of-topic, but I can't think of a better place to ask this.
Another group I subscribe to is devoted to BMW motorcycles from the 1960's (slash2s). For the most part we are getting 'long in tooth', and one member lamented that, although he could still ride, he had trouble kick-starting the bike due to knee problems. A lot of ideas were generated; one that came to me was that the engines used in these motorcycles (or close to them) were used in BMW cars of the late 50's and early 60's. They had a motor-generator mounted directly to the crank which was used to start the car and then charge the battery once it was running. Now these motor-generators were pretty big - maybe 12" or so in diameter, which would be too big to adapt to a motorcycle. But I was thinking, we have made huge strides in motor design in the past 50 years, so maybe a motor-generator could be designed to fit in place of the generator on these bikes. the space is about 5" diameter by 2" long. On my motorcycle, I measured less than 10 ft-lbs torque to push through TDC, and I have the hardest engine to kick start in the series (R69S). This seems pretty low, but these engines, when well tuned, could be started by pushing the kickstarter through by hand. So, as a thought exercise, do you think a motor-generator could be designed to start these engines yet fit within the physical constraints? -SteveS -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20200509/ea9286aa/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
