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jindoguy(at)gmail.com
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 Posted: Wed Dec 13, 2006 7:52 pm Post subject: Carb heat |
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I found this service instruction on the Rotax owners site. If it's been cited before, please excuse.
http://www.rotax-owner.com/si_tb_info/serviceinfo/4ul94.pdf
Rick
Having a newborn around again after all these years has convinced me of one thing,
this grandpa stuff ain't for whimps.
[quote][b]
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Thom Riddle
Joined: 10 Jan 2006
Posts: 1597
Location: Buffalo, NY, USA (9G0)
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| Posted: Thu Dec 14, 2006 9:22 am Post subject: Carb heat |
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Richard,
That is a good treatment of the subject of carb icing and I'm glad you
posted it.
BUT, the folks who wrote that are temperature math challenged. In their
table of temperature changes they have made some serious errors in
converting temperature CHANGE from C to F.
Temperature CHANGE (is not the same as actual temperature)
Their Conversion Correct Conversion
20C 68F 36F
30C 86F 54F
83C 181F 149F
140C 284F 252C
Yes, on your dual scale thermometer, 20C = 68F, 30C=86F, 83C=181F, and
140C 84F but the formula for temperature CHANGE, not temperature scale
equivalents is a simple linear relationship. A change of 10 degrees C
is equal to a change of 18 degrees F.
To convert ACTUAL temps from C to F the formula is slightly more
complex.
degrees C x 1.8 + 32 = degrees F
examples
0C (water freezing) x 1.8 + 32 = 32 F (water freezing)
100C (water boiling) x 1.8 + 32 = 212 F (water boiling)
To convert temp CHANGE in C to temperature CHANGE in F, the formula is
change in C x 1.8 = change in F
example
temp change of -20C x 1.8 = -36F
I can't even remember how many times this simple error has occurred in
official documentation from otherwise technically savvy organizations,
but it is way too many and something a technical editor should easily
find and correct before publication.
Thom in Buffalo
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_________________
Thom Riddle
Buffalo, NY (9G0)
Don't worry about old age... it doesn't last very long.
- Anonymous |
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