Jabiru 3300, Instruction And Maintenance Manual

Page: 5 / 103

Page No: 5 Issue No: 1 Date: 031100 Issued By: PJA
1.0 DESCRIPTION OF DESIGN
9 4 Stroke
9 6 Cylinder
9
Horizontally Opposed
9 One Central Camshaft
9 Pushrods
9 OHV
9 Ram Air Cooled
9 Wet Sump Lubrication
9 Direct Propeller Drive
9
Dual Transistorised Magneto Ignition
9 Integrated AC Generator
9 Electric Starter
9 Mechanical Fuel Pump
9
Pressure Compensating Carburettor (Bing Type 94/40)
It is said that "aircraft are designed around available engines".
Jabiru believe that the Jabiru range of very light engines will now offer new opportunities
for light aircraft designers, to develop a new generation of light aircraft.
Jabiru engines are designed to be manufactured in small batch quantities using the very
latest Computer Numerically Controlled (CNC) machine tools. The vast majority of the
components are manufactured in Southern Queensland in a network of high technology
small companies. The crankcase halves, cylinder, crankshaft, starter motor housings,
gearbox cover (the gearbox powers the distributor rotors) and coil mounts together with
many smaller components are machined using the latest CNC machine tools. The sump
(oil pan) is the only casting. The cylinders are machined from solid bar 4140 chrome
molybdenum alloy steel, with the pistons running directly in the steel bores. The
crankshaft is also machined from solid bar 4140 chrome molybdenum alloy steel, the
journals of which are precision ground prior to being Magnaflux inspected. The camshaft
is manufactured of 4140 steel and hardened using a nitriding process.
The propeller is direct crankshaft driven and does not use a reduction gearbox. This
facilitates its light-weight design and keeps maintenance costs to a minimum. The
crankshaft features a removable propeller flange which enables the easy replacement of
the front crankshaft seal and provides for a propeller shaft extension to be fitted, should
this be required for particular applications. Cylinder heads are machined from solid
aluminium billet which is purchased directly from one of Australia's largest aluminium
companies, as is all alloy used in the engine, thereby providing a substantive quality trail
to material source. Conrods are machined from 4130 alloy steel, the 45mm big end
bearings are of the automotive slipper type.
Under a direct supply arrangement with Honda, various components of the engines are
sourced. These items include camshaft followers, and the bendix gear in the starter motor.