Really, even using a simple morse-code style flash/no flash communication? Perhaps simple warning bonfires then... :( Ibrahim > -----Original Message----- > From: bounces@phoenyx.net [mailto:bounces@phoenyx.net] On Behalf Of > Jefferson > Sent: Thursday, January 27, 2005 3:52 PM > To: celandra@phoenyx.net > Subject: Re: [Cel] A bright idea? > > Andrew Janssen wrote: > > > Kaeir might find such a system useful; the Islands and Tirmaeir are > > close enough to be linked by such a system. > > > > As a rule of thumb, according to a website about heliographs that I > > found, every inch of mirror diameter gives you ten miles of range. A > > ten-inch mirror would be large enough to signal across the channels > > separating the islands from each other and the mainland. > > I think you'll find that those mirrors are _parabolic_ mirrors, which > Qaiyore > doesn't have the technology to make. I believe flat mirrors give you > about > 100 yards per inch diameter under ideal conditions, and the best (less > than > flat) mirrors available on Qaiyore would be worse. > > Also, taking the world's curvature into account, each of your observers > and > mirrors would need to be a minimum of 1380 feet above sea level. > > Jefferson > http://www.picotech.net/~jeff_wilson63/rpg/Exq_Main.html > > > > ---------------------------------------------------------------- > To unsubscribe, send mail to celandra-off@phoenyx.net. ================================ Confidentiality Statement and Disclaimer ================================ This message is intended only for the use of the individual or entity to whom it is addressed and contains information that is privileged and confidential. If you, the reader of this message, are not the intended recipient, you should not disseminate, distribute or copy this communication. If you have received this communication in error, please notify us immediately by return email and delete the original message. Thank you. ---------------------------------------------------------------- To unsubscribe, send mail to celandra-off@phoenyx.net.
