In message <[email protected]>, "Richard (Rick) Karlquist" writes:
>"Modern" fans obey the same laws of physics as the original equipment. >They don't magically produce more airflow for less noise. Agreed: there is no magic to it. But a lot has happened in aerodynamics since Hermann Papst invented the external rotor motor and had to add fans to keep it cold. In recent years noise from air transport have become a competition parameter, and these days you can buy standard fans that move twice as much air at the same dB level, as you would have found five years ago. As for reducing air-flow in old kit: I wouldn't do that without a careful session with a thermovision camera. Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [email protected] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
