Black Bull Manual
15
SOME FINAL IMPORTANT ADVICE
NEVER
switch on the engine with people near propeller, or to sides.
The BREAKAGE
of a propeller can cause very severe hurts even several
metres away.
DO NOT
keep engine at peak rpm after the take off, except for the absolutely
necessary time and for emergencies (obstacles or sudden wind).
REMEMBER
that the longer the propeller is and more thrust you get but less
cooling system is granted to the engine which it will operate under stress.
So keep under control the temperature of the engine with proper instruments
(CHT under spark plug and we reccomend also EGT of the exhaust gas
check page. 5 for the correct engine temperature)
In addition, dismantle the propeller at regular intervals and check that it is
perfectly balanced, since an unbalanced propeller, even slightly, creates
micro-vibrations which are not felt by the pilot, but can damage seriously
parts of the engine with consequent breakages.
Please do NOT forget that the propeller has mass and a considerable inertial
moment, so it’s advisable not to vary suddenly the RPM of the engine, both in
flight and on the ground.
These violent stresses could cause damages to the reduction, to the engine,
to the belt and also possible deformations to the fixing holes of the propeller.
Once you have found the perfect carburation, DO NOT modify it unless you
change flying place going to much higher or lower altitudes or unless climate
and temperature are very different from the ones where you fly usually.
DO NOT FLY in bad weather conditions, you’ll fly the day after.
REMEMBER: FLIGHT IS FOR FUN, NOT FOR RISKING YOUR LIFE!
HAVE A GOOD FLIGHT AND ENJOY YOURSELF.
