OS 50 SX-H Hyper Manual

In case the engine does not stop.

Hold the rotor head, and pinch the fuel line to stop the

fuel supply. If it still does not stop, pull off the fuel line

from the carburetor.

It is necessary to readjust the throttle linkage so that

the carburetor rotor is fully closed when the throttle

stick and throttle trim on the transmitter are fully

pulled Down.

NOTE:

If the throttle response is poor or the engine

stops due to a temporarily over-rich mixture

immediately after the engine is started, pinch the

fuel line for one or two seconds until the engine

r.p.m. increase and the engine runs steadily.

Reminder!

Never touch, or allow any object to

come into contact with, the rotating

rotor.

All internal-combustion engines benefit, to some

degree, from extra care when they are run for the first

few times known as running-in or breaking-in.

This allows the working parts to mate together under

load at operating temperature.

However, because O.S. engines are made with the

aid of the finest modern precision machinely and from

the best and most suitable materrials, only a very

short and simple running-in procedure is required and

can be carried out with the engine installed in the

model.

For the first few flights with a new engine i.e. while

the engine is being run-in set the needle-valve for a

slightly rich mixture not excessively rich as this may

result in poor throttle response and cause the engine

to stop.

About 1.5 turn open from the nomal setting will

usually suffice.

RUNNING-IN ("Breaking-in")