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> 32 lbs (force) = 1 slug x 32.2 ft/sec2 (acceleration of gravity) > > So that a slug is a mass which weighs 32 lbs in the earth's gravity. > Maybe... but after my last posting I seem to recall that 1 poundal is the force needed to accelerate a mass of 1 lb at 1ft/sec2. So 32(ish) poundals is the force to accelerate it at 'g', ie the weight of a 1 lb mass is 32 poundals. I thought 1 lbf was 32 poundals, but that was back in 1960 ! If people use the word 'lb' for a force and 'slug' for a mass, I'm definitely going to stick with SI, which is what I needed to know for high school and university, even if that means using metres and kilograms. At least that way I don't need 'stat-volts' (where 1 stat-volt = 300 ordinary ones!) and other peculiar units like slugs. Dave. UK VW Type 3 & 4 Club http://www.hallvw.clara.co.uk/ ------ ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/