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?
Geo Hahn
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