P.AP. Team RM80, User Manual

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RM80 components and elements.
Revisions and checks during this phase are detailed on section Maintenance, First 10 hours.
If you feel the engine is loosing power, it may be due to a poor carburation because it is not
properly adjusted or because the filter is dirty. Depending on the altitude, you will have to
readjust the carburation in order to avoid it being too poor. It is always recommended that the
engine carburation is richer than poorer; you will therefore avoid the risk of seizing.
After one or two hours of flight, it is important to control the torque of the screws of the cylin-
der head (see torque table). You will usually notice that the cylinder head is loose because
dull noises can be produced or stains of oil are placed over when removing the cooling cover
out of the cylinder
STARTING UP THE ENGINE
It is forbidden to start-up the engine without the propeller and/or the reductor gear. A two-
stroke engine has very little mass and without the load of these elements, it reaches its
maximum regime in a fraction of a second. There is no RPM limiter. All mechanical compo-
nents are designed to stand only to those RPM regimes of the propeller. An overflow regime
could be terrible for the engine.
Warming-up requires at least 1-2 minutes. During this period you should accelerate pro-
gressively in order to get the proper operating temperature. Do not let the engine turn
below 4500 RPM, since at that regime, the clutch hammers are constantly opening and
closing due to the limited centrifugal force; and due to hitting against the hood it is quite
likely that the springs, and even the clutch, will break. To know how much amount of petrol
you should put in the engine every time you start it up you only need to press your finger
against the proper push-button valve over the outer side of the carburettor and at the same
time against the petrol circuit feeder pump.
By means of practising you will anticipate the proper technique to take. A good thing is
to remember how long it has taken since you last start it up, thus determining if the next
start will be cold or hot. You could use the carburettor choke, however, this system is quite
uncommon but mainly used on extremely cold days.
REDUCTOR GEAR AND TRANSMISSION
The reductor gear leaning in oil bath is quite efficient and reliable, and has a very low noise pro-
duction. Its ratio is 3,65 / 1. Almost no maintenance and adjustments are necessary, except check
every 100 hours that oil level and state of the clutch are correct.
The transmission from the crankshaft to the reductor gear is connected by means of a dry cen-
trifugal clutch that allows the propeller to be not moving when idle. No maintenance is required.
The amount of oil to apply is: 16 ml. of SAE 140.
IMPORTANT: Before start-up, check that throttle cable is not blocked. To avoid
this, just press throttle several times (PIC. 5 and 5B).
AWARNING: If you start it up while accelerating, you should release the throttle
before the engine’s RPM increase.
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USER MANUAL