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+--- Forum: HP-65/67/97 Software Library (/forum-12.html)
+--- Thread: (HP-65) RR-Model Speed (/thread-15997.html)
(HP-65) RR-Model Speed - SlideRule - 12-02-2020 11:59 AM
An extract from A Speed Computer, NMRA Bulletin (vol-42 iss-8), MAR 1977, pg. 67
" Many model railroaders do their yard switching at a scale
speed that could win the pole at the Indy 500. It's not that
they don't care, it's just that measuring scale speed is a
pest. But a programmable pocket calculator like the Hewlett-
Packard HP-65 can …
…
If you own an HP-65 calculator use this program …
…
If you don't own a calculator use this graph … "
BEST!
SlideRule