Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site Glacier.ARPA
Path: utzoo!watmath!clyde!burl!ulysses!allegra!oliveb!Glacier!reid
From: reid@Glacier.ARPA (Brian Reid)
Newsgroups: net.bicycle
Subject: Re: Building a LOUD horn
Message-ID: <11416@Glacier.ARPA>
Date: Fri, 6-Sep-85 00:54:13 EDT
Article-I.D.: Glacier.11416
Posted: Fri Sep  6 00:54:13 1985
Date-Received: Sat, 7-Sep-85 06:07:25 EDT
References: <1119@ihlpg.UUCP>
Reply-To: reid@Glacier.UUCP (Brian Reid)
Distribution: net
Organization: Stanford University, Computer Systems Lab
Lines: 21
Summary: buzzers, my foot. We're talking air horns here.

A number of years ago I built the loudest damn bicycle horn you ever saw. I
went to a photo store and bought a Falcon Dust-off setup, which has a can of
freon and a trigger that squirts freon out a nozzle. I then went to Sears
and bought a little boat horn that was intended to be powered with
compressed air of some kind. The boat horn screwed right into the Falcon
nozzle--same 1/4 npt threading. I then mounted the whole thing in the
waterbottle cage, with the horn pointing up and to the rear, and ran a
control cable from it to a Sturmey-Archer 3-speed gear trigger. The control
cable attached neatly to a little hole in the Falcon trigger.

The resulting horn was louder than your average Mack truck; it made a
"supersound" seem like a bird chirping by comparison (also it was about 3
octaves lower-pitched than a supersound).  It was stolen about a month
later, and I never got around to building a replacement. I think if I had it
to do again, I'd mount the boat horn on the handlebars and run pressure hose
from the freon cannister up to the horn (this kind of pressure hose can be
bought in the tool department of Sears--it's used for attaching spray guns
to electric air compressors).
-- 
	Brian Reid	decwrl!glacier!reid
	Stanford	reid@SU-Glacier.ARPA