Having completed the ground testing and awaiting CAA inspection, I have
time to contemplate on one observation made:
The temp. indicator that came with Skydrive's carb. heater blocks for
912S shows block temp increasing as the CHT readings increase. When
reaching 50 degr. C, the indicator flashes HHH (as it is supposed to do
at this temp.).
According to Skydrive's notes, the carb. heater block temp normally is
between 20 and 50 degr. C. This is, I take it, in flight.
Here are my questions to those already flying with this equipment:
- Do the blocks cool down when airborne and operating the engine at
normal flying loads, i.e. when the higher fuel volume evaporation cools
the carburetors from the inside? Or does your temperature reading
always stay below 50 degr. C even when taxiing on the ground?
- Have you fitted any permanent restrictor in the branch-off tube to the
carb. heater blocks, or fitted the flow control valve that Skydrive
provides as an option, in order to keep the carb. heater block temp. in
the range mentioned by Skydrive?
Best regards,
Svein
A225 - now in Norway
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