Calidus
HANDLING / MAINTENANCE
AutoGyro_POH_Calidus Revision 4.0 – Issue Date 17.JAN.2019 8-6
8.14 Winter Operation
The cooling system for the cylinder heads of the engine is filled with a mixture of ethylene
glycol anti-freeze and water, which gives freezing protection down to -20°C. Check
protection temperature of the coolant and add anti-freeze, if necessary.
If temperatures are expected to fall below protection temperature, drain the coolant, and if
required for service, refill with pure antifreeze. As anti-freeze ages, renew the coolant every
two years. Read the engine manual for the manufacturer’s recommendations.
CAUTION
Pure antifreeze is not as good an engine coolant as a 50/50 mix with water.
Take care that engine coolant limits are not exceeded. As soon as ambient
temperatures permit, drain and refill with the normal coolant mix.
During winter operations the necessary operating temperature for oil and cooling agent may
not be reached. This can be compensated by taping some portion of the coolers. Monitor all
engine temperatures closely after having the coolers taped and modify as required.
If installed, it is recommended for preventing icing to the carburettor to remove the air filter
tube, which leads the air filter out of the engine cowlings, at sustained environmental
outside air temperatures (OAT) below 10 °C. The air filter should be mounted to the engine
directly. In this case the opening for the air filter in the engine cowling should be sealed with
proper duct tape.
Before each flight inspect all control cables for free and easy movement and sufficient
lubrication.
To Next Page
Loading...