Running In The Engine - Titan ZG 45PCI-HV Instructions Manual

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Further with the engine stopped, the ignition still draws a small current of 30 mA that

will unnecessarily flatten the battery when forgotten.

The ignition has to switched off after every flight!

Running in the engine

This is the critical time in a engine's life. Do not use the glow-engines method of a

really rich set needle valve on a test stand on half power, rather set the needles on

the Titan ZG 45PCI-HV to a normal position and fly the new engine with very short

periods of full throttle and long periods of tickover. You will of course ensure that the

mixture setting is not on the lean side. Avoid letting the engine run at half or three

quarter throttle for long periods. After the first tank full you can increase gradually the

full throttle periods. After four tank fulls you can fly full throttle for as long as you wish.

Experience has shown the power steadily increases over the first fifty flights and even

after this time, the power will increase from season to season, due to the build-up

of carbon deposits on the piston crown and on the combustion chamber walls. This

carbon build-up increases the compression ratio. Because the engine is designed for

an extraordinary long life span, even when mineral based two stroke oils are used, the

designers had chosen a relatively low compression ratio to allow for a considerable

amount of carbon build-up. So "don't worry" about carbon build-up and as long as it

is not in the piston ring groove, do not remove it, instead "be happy" about the extra

power!

It is far better to break in the engine in a model with the engine cowling fitted. Due

to the unequal temperature distribution around the cylinder, because of the unequal

cooling airflow, the cylinder always tends to slightly distort. A new piston ring, with

his special surface treatment, can easily adjust to this condition. During the first hour

of running in, the piston ring will continually get polished and thereby it's surface

becomes harder. An engine, that has been run in on the test stand, must run for a

considerable longer length of time, until it has settled down to the new and almost

always completely different temperature distribution under the models engine cowling.

Instructions Titan ZG 45PCI-HV

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