Bycicle computor for rrpm

[Aussie_Paul]

Hi people, I need the numbers to program into a bycicle computer that will give me the rotor rpm when I have one magnet on the pre rotator ring gear.

Please. Aussie Paul.

[gyroman]

Aussie Paul,

Here is a post from the old conference on the bicycle rotor tach, hope it helps.

Date: September 30, 1999 08:27 AM Author: Mike Schallmann (rotors@uswest.net) Subject: $15 (or less) Rotor Tach

Ive had several people ask me about this so I decided to post it. This rotor tach is cheap , dependable and accurate. There are several places that you can get this tach. I got mine at Wal-Mart but you can also get it at Target, K-Mart and a lot of bicycle shops. It is the 5 function Cyclocomputer made by ACE Model # 810-230. It is sold under various brands but it is always identified by the Model #. It is powered by a small battery (with auto on-off ) The directions are very simple and easy to set. It comes with about 6' of cable and you will need to splice in a longer section - I have lenghtened my cable to 10 ' and it still works. You mount the magnet to the prerotator ring or to the rotor head, and then you mount the pickup where the magnet will pass within 1/4" of it. Read the instruction for setting the cyclometer and set it for metric "L" with the number 1667.( If you prefer to use two magnets ,space them 180 deg apart and set it with the number 833). Mount the digital readout where it is convienent --and there you have it !! The read out will show a decimal point right before the last digit-just disreguard it . The unit is accurate to within five (5) RPM. (BTW this is not my idea Tom Sled told me about it!!)

[Aussie_Paul]

Many thanks Toby. Aussie Paul.