Next message: alex v: "Re: lv-ab: Speed Through-the-water"
OE has a buit in spelling chaecker, see?
Try this for DR speed. I have used this for four years.
How would you like an instrument that will tell you the total miles
travelled, leg miles travelled, speed to +/- .05kn, runs more that four
years on a battery, totally independent from boat power, large digital
display, time, average speed, instant speed, probably more...........
Price? $25.
A bicycle speedometer.
Epoxy the magnet onto the shaft. Align the sensor and support it in place.
( I use a strip of folded thin aluminum epoxied to the top of the
transmission.) Find some twisted pair wire about 20GA, run it up to the
display. Carefully read the instructions. It will tell you to load a
constant into the instrument which adjusts for the various bike wheel sizes.
Pick a number load it in and see what happens when you are at dead idle in
gear. Say this would be 2 knots. Look at the number displayed. Is it too big
or too small. Change your constant appropriately. After about six or so of
these trys you will find a number which is your DR speed one decimal point
wrong. so forget the decimal point. Now you are close. go run a measured
distance, do the same foolery with the constant to get a number which is
exact. Voila! Worth many beers with your friends. Tell 'em Richard sent ya.
Richard
----- Original Message -----
From: "Eric Thompson" <>
To: "LIVE ABOARD" <>
Sent: Saturday, March 31, 2001 10:31 PM
Subject: lv-ab: Speed Through-the-water
> Hello Folks,
> Does anybody know of an accurate, INEXPENSIVE, speed sensing device that
> displays speed in knots?
> I am visually inpaired so 'dials' are useless, I need digits.
> I need to be able to deploy, and retrieve the sensor easily as I do not
> intend to allow foulind to occur.
> Ny current thru-the-hull speed transducer/display is wrong to the tune
of
> 20%. I has no calibration ability.
> My Trimble differential GPS gives me great over-the-bottom speeds but in
> order to compute my optimum RPM for motoring I really need the accurate
> through-the-water speed.
> Any help would be wonderful!
>
>
> Also, does anybody know of a spellcheck program that will work with
> 'OUTLOOK EXPRESS 5?
> I NEED a spellchecker for my e-mail. NO I'm NOT going to install 'OFFICE
> 2000! It introduces too many variables.
> I still have never experianced the famous 'refusus to turn off' error!
> Thanks for your help, again,
>
>
>
>
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