Force Engine Force 46 Bedienungsanleitung Seite 3

Operating Instructions
Combustion Engine „Force 46"
Item no.2595506
1 Prescribed use
The highly developed combustion engine you purchased is intended to be used in suitable
models. Please observe the following safety instructions and danger warnings.
All company names and product designations contained herein are trademarks of the respec-
tive owners. All rights are reserved.
2 General information
Dear customer, the following operating manual gives notes and information on the operation
of the engine.
Combustion engines for models are a powerful alternative to electric motors if the much louder
operating noise and the exhaust fumes do not matter in model operation.
They are, however, not so easy to handle and require special treatment before, during and after
operation. In the case of wrong treatment, the engine has a low power output, does not run cor-
rectly, or is inoperative after only a short runtime (please bear in mind that improper operation
leads to loss of guarantee/warranty!)
As a matter of course, these operating instructions cannot impart any practical knowledge. If
you have never worked with a combustion engine, we recommend joining a model construction
club in your area.
There, you will surely find help for the first steps to a successful handling of model combustion
engines.
3 Up-to-date operating instructions
Download the latest operating instructions at www.conrad.com/downloads or scan the QR code
shown. Follow the instructions on the website.
4 Explanation of symbols
A symbol with an exclamation mark in a triangle points to important information in
these operating instructions which must be observed.
5 Safety instructions
We do not assume liability for damage to property or personal injury caused by improper use
or the failure to observe the safety instructions. The guarantee will expire in any such case.
Depending on the engine type and the respective model in which it is installed (airplane, car or
ship model), some of the following safety instructions might not apply.
Keep the product out of reach of children. It is not a toy; it should be kept out of reach of children
under 14 years of age!
Before each start, ensure the safe operation of your model and of the engine.
Even normal engine vibrations can lead to the loosening of the engine and other drive parts.
Therefore, check if the engine and all drive parts sit correctly prior to each new starting of the
engine.
Caution, important note!
Operating the model can lead to material and/or personal damage. Therefore,
make sure that you are properly insured when using the model, e.g. by taking out
private liability insurance. If you already have insurance, enquire whether the
operation of the model is covered before operating it.
Please note: In some EU countries you are required to have insurance for any
flying models!
Never operate the engine in closed rooms. The fumes are poisonous! If the engine is operated
outside the model, a suitable test stand is to be used.
Keep children and spectators away from running engines.
For starting the engine, use a suitable starter or finger protection (airplane models with propel-
ler). Some engines allow a comfortable start with a so-called pull starter.
Engine and sound absorber become very hot during operation. Risk of burns! To stop the
engine, interrupt the fuel supply or close the carburettor tap. Never try to stop a running engine
with your fingers. Risk of severe injuries!
With airplane models with a propeller, never stand in front of or next to the engine/ propeller;
there is a high risk of injury! Setting and adjustment work must be carried out from the rear!
Make sure that no fuel leaks in an uncontrollable way during the operation of the engine; risk
of fire, explosion and burns!
Never hold any objects into moving drive parts (e.g. propeller). Do not block the engine.
Propellers must not be repaired. Damaged propellers must be replaced!
The transmitter and receiver must be left switched on as long as the engine is running in order
to keep the model and the engine under control at any time.
Do not try to experiment with your engine. Seek the advice of an experienced modeller or let
the latter help you with the assembly.
Do not leave packaging material unattended. It may become a dangerous toy for children.
6 Mounting the engine
The engine must be fastened firmly and free of oscillation on a stable engine support (prefer-
ably made of aluminium). To that effect, use sufficiently dimensioned screw bolts and secured
screw nuts. The engine should be plane with the clamping surface so that the motor flange
cannot distort.
7 Adjusting the carburettor
In general, carburettors are equipped with two independent adjustable needles. The first nee-
dle, the full throttle needle, is located directly at the fuel connection. With this needle, the full
throttle run is adjusted.
When the needle is unscrewed, the engine is supplied with more fuel. This is called a rich car-
burettor setting. When the needle is screwed into the nozzle connection, the flow cross section
is reduced and the engine is supplied with less fuel. This is called a lean carburettor setting.
The second needle is the idle speed needle. With some airplane engines, for example, the idle
speed needle is located opposite to the full throttle needle on the other side of the carburettor.
With this needle, not only the idle speed but also the transition from idle speed to full throttle
is adjusted.
As with the full throttle needle, the air mixture is made leaner by screwing in the needle. When
the needle is unscrewed, a richer setting is achieved. The full throttle needle is to be opened by
approx. 2–3 turns. The same is to be done with the idle speed needle.
If the tip of the idle speed needle is visible through the open carburettor, the needle is to be
set in such a way that the tip of the needle starts to immerse in the counter cone when the
carburettor is half closed.
The engine can be started with the carburettor being opened by ¼. After the warming-up, the
full throttle is adjusted. The highest engine speed is adjusted by screwing in the full throttle
needle, with the carburettor being opened completely. As the engine becomes weaker during
operation, you should now unscrew the full throttle needle slightly on the "richer" side.
A too lean idle speed setting causes the engine to stop when throttling the engine or accelerat-
ing. If the engine becomes slower in idle speed until it stops, or if it accelerates only reluctantly,
this means that the idle speed setting is too rich and must be made leaner.
Modifications to the needle must only be carried out in small steps; this applies especially to
the idle speed needle. Taking an analogue watch as an example, an adjustment by "5 minutes"
can already be too much.
A correctly set engine will always run smoothly, also at longer idle speed running times, and will
accept the throttle promptly.
If you have no experience with model combustion engines at all, we recommend the help of an
experienced modeller. You can thus prevent not only lengthy (unsuccessful) trying but also a
damaging of the expensive engine.
8 Running in the engine
Recommendation: Use an already mixed brand fuel which usually contains additio-
nal additives which are advantageous for the engine.
If you nevertheless want to mix the fuel yourself, you must use high-quality fuel
components (synthetic oil, nitromethane, methanol).
Before the first startup, the engine needs an initial running-in phase. Thereby, very fine ma-
chining traces on rotating or jointly gliding components are smoothed. Special running-in fuel
usually contains a smaller amount of nitromethane.
Carefully screw in the enclosed main throttle needle (needle with fuel intake) up to the limit
stop; then open it by 2-3 turns. Turning out gives a richer mix, turning in a leaner mix. The initial
running-in phase at low speed (with fully open choke tap and extremely rich mix) should aver-
age 2-4 tank fillings. After each engine running (tank filling), allow for a sufficient cooling phase.
Afterwards, the mix should be made leaner step by step by screwing in the main throttle needle
and the model can already be used. The final running-in of the engine can, depending on the
model, last several hours. After this phase, you can operate the engine with full power.
Important!
With a new engine, the carburettor setting must be adjusted, from the start, as rich
as possible. It is only in the course of time that one can approximate the maximum
engine power. Now you can also properly adjust the idle speed.
A too rich carburettor setting prevents the engine from running at full power. Howe-
ver, a setting that is too lean is dangerous for the engine and, sooner or later, leads
to an engine damage!