POH LTF-UL-2019 C42B Issue 1 • Pilot Operating Handbook
POH LTF-UL-2019 C42B Issue 1
Page 25 of 84
Attention:
If the radiator flap is completely closed, sufficient cooling air supply to the
water cooler is no longer guaranteed over a longer period of time, i.e. the
cylinder head or coolant temperature and oil temperature will rise into the
impermissible range (red range). To prevent failure to open the flap, an
additional warning light (orange) is installed at the factory, which flashes
when the cylinder head or coolant temperature reaches approx. 248°F
(120°C) and generates a warning tone. In this case, the radiator flap must
be opened completely immediately.
Basically, do not wait for this warning light to light up, but observe the
temperature and open the flap manually at 194° - 230°F (90 - 110°C) so
that the temperatures are in the optimum range.
By reducing the engine power and increasing the airspeed during descent,
the cooling down to permissible or optimal temperatures can be supported.
During the pre-flight check, a functional check of the radiator flap must be
carried out.
Careful observation of the cylinder head and oil temperature is necessary
for sensible and safe use of the radiator flap.
9.3
Notes for using the LiFe-starter battery
The LiFe starter battery used in the Ikarus C42 is an accumulator which, due
to its high energy density, enables an effective empty mass saving of over
8,6 lbs / 3.5 kg. This battery is also characterised by the following properties:
-
maintenance-free
-
small dimensions
-
high voltage level
-
fast-charging
-
high pulse current capability
-
extremely low self-discharge