At 12:53 -0700 12/6/05, Paul Willoughby wrote:
>>The TR3s and early TR4s had Fahrenheit temp gauges with a mid point
>>of 185 degrees... which I think is pretty much normal operating
>>temp for their engines.
>>
>>The later TR4s went with a Celsius gauge with a mid-point of 70
>>degrees C which is 158 degrees F. Did they expect that engine to
>>now operate at 158 degrees?
>>
>>What has me thinking is that using the 'F to C' conversion formula
>>yields: (185-32)(5/9)=85C but if you get the operations out of
>>order it can incorrectly yield: 185(5/9)-32=70.8C.
>>
>>Do you suppose they just goofed on the conversion and ordered
>>gauges with 70C as the mid-point? Or was there some other reason
>>for this?
FWIW, my 60 TR3A has a Celcius temp gauge (do not know where it came
from) & it's center point of 85C.
John
John A. Wise, Ph.D., CPE
Glendale, AZ
JohnWise@alumni.pitt.edu
1960 TR3A TS80422L
http://home.earthlink.net/~johnwise/TR3A.html
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