ROBBE RCGF 45 Betriebsanleitung Seite 3

Specification
Capacity: 45 cc
Bore x stroke: 43 x 31 mm
Power: 4.3 bhp, 3.0 kW
Speed range: approx. 1500 – 7600 rpm
Weight: approx. 1610 g incl. silencer
and ignition unit
Ignition: electronic
Ignition battery: 4.8 - 6 V
Propeller: 20 x 8" (approx. 8000 rpm)
20 x 10" (approx. 7600 rpm)
22 x 8" (approx. 7500 rpm)
Introduction
The RCGF 45 petrol engine works on the two-stroke principle.
This means that the gas exchange process within the engine
occurs through slots, or ports, in the cylinder, and each full
rotation of the crankshaft acts as a working stroke.
The fuel mixture is ignited by an electronic ignition system
powered by a 4.8 V battery. In contrast to glowplug motors, a
constant voltage must be present for the engine to run.
Suitable fuel
Use normal two-stroke petrol / oil mixture (mix ratio 1 : 50). It
is essential to use a high-quality synthetic lubricating oil.
No special fuel mix is required for running-in.
Silencer
Use the silencer and exhaust manifold supplied with the engi-
ne.
Safety notes
Do not allow petrol to contact your skin, eyes or nose. If this
should occur accidentally, wash the affected area immediate-
ly using plenty of cold water. Do not breathe in petrol fumes.
The engine must only be run outdoors, or in a room with a sui-
table forced ventilation system.
Keep well clear of the rotational plane of the propeller - injury
hazard.
You will need the following items to operate the petrol
engine:
- Propeller (see Specification for recommended sizes)
- Fuel mixture
- Fueltank (approx. 500 cc) and petrol-proof fuel tubing
- 4.8 V ignition battery, min. capacity 1200 mAh
- Switch harness for interrupting the ignition current
Installation, running-in procedure, running-in time
The engine should be run-in whilst mounted directly in the
model. Install the power plant, fueltank and fuel tubing in
accordance with the kit instructions.
Install the ignition unit and its power supply: push the plug
cap onto the sparkplug, and connect the sensor "Z" to the
electronic unit "E".
Connect battery "A" to the electronics using the switch harn-
ess "S". Secure the ignition battery and electronics.
© robbe Modellsport
Operating Instructions
RCGF 45 two-stroke petrol engine
Connect the throttle servo and check from the transmitter that
it works correctly.
"Z"
"S"
Select the appropriate propeller, drill additional holes in the
hub if necessary to match those in the prop washer, and fit it
on the engine shaft. The propeller should be mounted in such
a way that one tip is angled slightly to the right of vertical
when the piston is at top dead centre (TDC).
Never attempt to hold the crankshaft immobile by inserting a
screwdriver or similar tool in the exhaust port while you tigh-
ten the propeller, as this would immediately ruin the piston
and cylinder liner.
Check that the engine is securely mounted in the model.
Ensure that the propeller is firmly attached to the crankshaft.
Install the silencer and connect the fuel lines.
The engine requires about ten hours of running-in to free up
completely. The first tankful of fuel should be run through the
engine on the ground. The model can then be flown during
the remainder of the running-in period, keeping the mixture
rich all the time. During this initial period avoid operating the
engine at full-throttle for long periods.
The carburettor
The carburettor is correctly set at the factory, and should not
be adjusted unless absolutely necessary.
The carburettor controls
- 1 Choke
- 2 Throttle lever (throttle pushrod connection point)
- 3 Idle stop-screw
- 4 Idle needle
- 5 Main needle
Running the engine for the first time
Caution: if you intend to start the engine by hand, a thick
glove must be worn to reduce the risk of injury. Secure
the model carefully, so that there is no chance of it rolling
away accidentally.
3
"A"
"E"