Steve,
I disconnected the temperature gauge as it came on above 50C degrees
even when taxying. A higher 'ranged' gauge is required if needed at all.
Now use it as an OAT located in the Air Plenum chamber. Never had a
problem with the temperature of the blocks and yes, I suppose it does
vary as the CHT varies.
Cheers,
Tim
Tim Ward
12 Waiwetu Street,
Fendalton,
Christchurch, 8052
New Zealand
Ph +64 3 3515166
Mobile 021 0640221
ward.t@xtra.co.nz
----- Original Message -----
From: Sidsel & Svein Johnsen
To: Europa List
Sent: Monday, August 21, 2006 7:56 AM
Subject: Europa-List: Carb. heater block temp.
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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