Rotec AEROSPORT R2800, Руководство по эксплуатации, Страница: 56 / 87

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FUEL SYSTEM
The fuel system comprises of two fuel pumps one mechanical (supplied) and one electrical (not supplied). They are
both plumbed in series and should supply fuel via a good quality in-line fuel filter, at a pressure not exceeding 4psi.
The carburettor is a 40mm type 94 Bing and features automatic pressure compensating mixture control. There is no
manual mixture control. The carburettor is factory set on the test run by Rotec and should only require minor adjust-
ments. The carburettor is supplied as standard from Bing with stock control levers. The levers and butterfly return
spring may require modifications to suit. Thorough inspection for correct carburettor lever operation for both the
choke and throttle butterfly should be employed before first flight.
An air filter and carburettor heat (both not supplied) should be incorporated in the air intake ducting.
The choke should only be employed for starting purposes only and must NOT be used as enrichment devise during
cruise operation.
As a part of the engine test run all carburettors are adjusted for best operation. However due to different propellers
and applications minor adjustments may be needed to the idle dead stop which is a screw that controls the amount of
“Butterfly Crack” required for a smooth Idle. Also the shrouded brass idle mixture screw situated vertical facing down.
This screw controls idle mixture volume and should be adjusted in conjunction with the previously mentioned dead
stop.
The main jets are factory set and control fuel mixture at higher power settings. They should not be tampered without
first consultation a Rotec technician. A too lean mixture due to the installation of incorrect jet specifications can lead
to high combustion temperatures resulting in possible engine damage.
For all servicing / repairs / Spare parts for the Bing Type 94 Carburettor please consult an authorised Bing service
centre. Or alternatively a Rotec technician.
BING CARBURETTOR OPERATION
WARNING:
The factory supplied Bing carburettor cannot supply fuel when inverted or subjected to negative gravity. Engine fail-
ure due to fuel starvation may result.
GENERAL
ROTEC TBI-MK.II ADJUSTMENT
Open the mixture screw 1-2 turns, fine adjust for smooth idle. The determination of the main jet is factory set at full
power, full load, with and EGT (Exhaust Gas Temperature) reading of 600 +/- 20 degrees C.
FUEL METERING
Options available for fuel metering include:
• The Rotec TBI Fuel System, which is highly recommended as it offers superior performance, in flight mixture con -
trol, is fully aerobatic and is less suitable to carburettor ice compared to other carburettors.
• The Bing Carburettor is offered as standard. Carburettor heat is recommended on this device as it is more suscep -
tible to carburettor icing than the Rotec TBI Fuel System.
We have not seen any attempts to convert the engine to electronic fuel injection at this time
IMPORTANT:
Check all carburettor couplings, both fluid and mechanical, are integral and secure. Throttle butterfly should spring
return to FULL power or open and choke should spring return to OFF or lean.
NOTE:
For detailed information regarding operation and adjustment of your Rotec TBI-Mk.II, please read the product manual
that came with your purchase.