Re: "Normal Operating Range" for Engine Temp?

This is not specific to an OS .50, but it is generally accepted that DURING
OPERATION the temp is between 180 and 240 deg F (this varies greatly due to
engine, climate, fuel, cooling differences). This is also measured on the
cylinder opposite the exhaust, near the base of the head.

Examples:
TT 39 ran well at 215-220 in Idaho, USA (around 2300 ft MSL, 90-100 deg F
ambient air temp)
OS 70, still being tuned properly in " (190-200)
TT39 (same engine as above) at 180-190, running in Portland, Oregon (a few
hundred feet MSL, 70-80 deg F ambient air). Note, I will probably lean this
a bit more...
OS .12 CV R/C car engine, runs at 240 deg F.

Note, that all these temps were taken with a custom temperature logger that
records the temperature every 5 seconds throughout the flight.

-Dan

What would be the normal operating range for an OS .50?

Looking for a temp range so I can monitor it.