Re: Tony Thompson & Scale Weights
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Paul Hillman
Tony,
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HUM!!!??? That just brought up another interesting thought to me. Wouldn't it be more true to scale-weight then, to know the prototype-car's empty weight, divide that by the cube of 87.1, (or some other scale ratio) and weight the car accordingly, rather than per the NMRA tables, eventhough they're a pretty good, "ball-park" figure? Paul Hillman
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From: Anthony Thompson<mailto:thompson@signaturepress.com> To: STMFC@yahoogroups.com<mailto:STMFC@yahoogroups.com> Sent: Thursday, August 18, 2005 10:57 AM Subject: Re: [STMFC] Tony Thompson & Scale Weights Paul Hillman wrote: > Say, in HO scale, 87.1:1, we physically scale-down the prototype > dimensions by that ratio. What if the car were built of the exact same > materials as the prototype, would the weight scale-down by 87.1 also? No, it would scale by the volume, which goes as the cube root of the scale. That would make it roughly 1.5 to 2 ounces. Tony Thompson Editor, Signature Press, Berkeley, CA 2906 Forest Ave., Berkeley, CA 94705 www.signaturepress.com<http://www.signaturepress.com/> (510) 540-6538; fax, (510) 540-1937; e-mail, thompson@signaturepress.com<mailto:thompson@signaturepress.com> Publishers of books on railroad history Yahoo! Groups Links
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