Titan ZG 45PCI-HV Instructions Manual page 10

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Fuel tank

With a tank of 500 cc, without an intake tube on the carburettor, the Titan ZG 45PCI-HV

will run for about twelve minutes on full throttle. But with an intake elbow between

the carburettor and engine plus a bellmouth intake tube, so that the induction air is

drawn out of the fuselage, a 500 cc tank will give almost twenty minutes at full throttle.

A 500 cc tank is ample for a stunt model, while for glider towing our 1000 cc tank is a

suitable size. It is better for the tank to be built into the model at a level above that of

the carburettor. The carburettor has non-return valves fitted, so that the fuel cannot

run out through the carburettor as long as the engine is not running. For starting, it is

better when the fuel line is full with fuel. With the engine running, it does not matter

how long the fuel line is. You can install the tank anywhere you please in the model, at

the CG position for example. But keep the fuel line as straight as you can. Avoid bends

that will hold air bubbles.

It is impossible to prevent the fuel in the tank from foaming. This foaming means you

must use our special cotton felt clunk filter - omit this clunk filter and your engine will

draw more air than fuel. Model aircraft fuel filters are useless for petrol engines; the

transparent automotive paper element fuel filters are also useless. The former have

too coarse a mesh, and the latter have a large capacity, allowing air to accumulate and

thereby causing the engine to stop, due to the sudden ingestion of this accumulated

air by the carburettor. The second and very important reason for using our cotton

felt filter is that in petrol there is always a certain amount of suspended matter, that

is almost impossible to see with the naked eye. This dirt will easily pass through the

model filter and build up in the carburettor, mainly in the low speed fuel passages.

When this happens, the only cure is a new carburettor.

Fitting a T-piece in the fuel line between the tank and carburettor for tanking will be an

obvious mistake to most folks, but we have seen this method of short-circuiting the felt

clunk filter in the tank, with the obvious results, more often than one would imagine.

Instructions Titan ZG 45PCI-HV

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