Limited Rotax 912 ULS Tachometer Green Range

[bransky29]

I recently purchased a pre-owned Just Aircraft Highlander with a Rotax 912 ULS. When the Engine type ROTAX S/ULS is selected in the setup menu, the tach range appears incorrectly. Notice in the photos below that the oil temp is well above 120 degrees and the tach green range is very limited. Any ideas why?

Also, the option for combination CHT/EGT is not available. Is that because the EGT is named 1 & 2 while the CHT is L & R?

Thank you!

 

[Dynon]

So the tach has a dynamic yellow range for the tach (and oil temperature) based on Rotax's operating rec's (avoiding higher rpm until the oil temp comes up, and having a different coloring scheme on the oil temperature until it's hot enough to boil off off any water that may have collected, which is supposed to happen once per flight). Below is the excerpt of the behavior.

For the behavior to work, though, the oil temperature needs to be configured as the pre-canned name. In your case, it looks like your oil temp gauge has a lightly nonstandard renaming. So you have one of two options: In you pin mapping setup, reset the oil temperature pin (usually c37_p7) to have the default OIL name (instead of the OIL T name it currently has). Or, if you prefer, you can just set your engine type to OTHER, and then you'll likely need to manually configure your oil temperature and rpm ranges.



Rotax 912 Behavior
SkyView can be configured to adjust the oil temperature and tachometer gauges for the Rotax 912 engine dynamically to reflect limitations that Rotax specifies for that engine. When this behavior is turned on (per the SkyView Installation Guide), the tachometer and oil temperature behave in the following ways:

Tachometer for Rotax 912:
When OIL TEMP < 120ºF, the TACHOMETER displays these ranges:
[ch61623] 0-1400 and 4000-6000 RPM in RED
[ch61623] 1400-1800 and 2500-4000 RPM in YELLOW
[ch61623] 1800-2500 RPM in GREEN
When OIL TEMP > 120ºF, the TACHOMETER displays different ranges:
[ch61623] 0-1400 and 5800-6000 RPM in RED
[ch61623] 1400-1800 and 5500-5800 RPM in YELLOW
[ch61623] 1800-5500 RPM in GREEN
The alarm type for the tachometer is the “self-clearing” type.

Oil Temperature Gauge for Rotax 912:
When OIL TEMP < 190ºF, the OIL TEMP gauge displays these ranges:
[ch61623] 100-120 and 230-266ºF in YELLOW
[ch61623] 120-190ºF in GREEN if OIL TEMP has been above 190ºF “more recently” than OIL TEMP was below 120ºF; otherwise 120-190ºF is displayed in BLACK OUTLINED IN WHITE
[ch61623] 190-230ºF in GREEN
[ch61623] 266-280ºF in RED.
When OIL TEMP is > 190ºF, the OIL TEMP gauge will display different ranges:
[ch61623] 100-120 and 230-266ºF in YELLOW
[ch61623] 120-230ºF in GREEN
[ch61623] 266-280ºF in RED
The alarm type for oil temperature is the “self-clearing” type.