Quote:
Originally Posted by tortoise
On what principle do you assume that peak BSFC is in this RPM range?
As to the added mass, lowering the p&g frequency sounds good, but do you have a guess as to the effect on rolling resistance?
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BSFC normally approximates an inverted torque curve with additional friction and waste heat advantages as the rpm's get lower.
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I guess it would be easy enough to do coast down measurements to find out how much rolling resistance would increase with added ballast. Judging from the photos I have been seeing from last year it looks as if the track is packed all the way around. With 50 cars on the track, if they were perfectly spaced all the way around, that is only 100 meters apart. And I'm sure that things will get buched up more than that so there is not much room to get your ideal pulse. It might just be better to leave the system as responsive as possible for the best and most flexible maneuvering.