Ballarat Aviation Museum, Australia
HWK 109-509.A-1   Wkr.Nr. Unknown

This motor is displayed in one of the aircraft exhibition hangars within the museum.

This exhibit shows another novel way of displaying the Walter motor. From what one can see, a large wooden profile shape of a Komet fuselage has had the middle section cut away to show the location of the motor as it would appear when installed in the aircraft.

The display goes some way to showing how the motor is fitted in the airframe, although it does mean that as the exhibit is against the hangar wall, the starboard side of the motor is not visible. This is a pity, as this side is the one which would carry the manufacturer's data plate, and so far I have not been able to confirm if one is present, or its details.

It is quite clearly an HWK 109-509.A-1 motor, with electrical starter and accessories gearbox.

Known History.

To date, information about this motor is sparse. I have been trying to acquire more information, but as yet I cannot say how this motor came to be at Ballarat, or what its previous history was.

The following photographs were taken in Autumn 2001.

Description.

From the photographs the motor seems to be in comparatively good condition.

The steel parts of the motor, the frame and the gearbox, seem to have been painted, to give the unit a greater degree of longevity, but luckily, the painting is in keeping with most genuine paint schemes, and the aluminium cast pieces have not been painted.

The copper-bronze colour of the thrust tube and combustion chamber is an approximation of the graphite oiled steel, but it seems a little bright.

Photographs © Gil Johnson - used with kind permission -

A closer view of the motor in profile shows that it has the classic lines of the "A-1" motor, with large heavy accessories gearbox. The steam generator is shown clearly in this view. Both features classify this as the "A-1" model.

Seen from a slightly different angle, the T-Stoff inlet riser pipe is shown, together with a better view of the fuel flow/pressure equalising unit. The strange addition, which you can see as a pipe opening in the middle of the forward part of the motor frame, is the fuel pump steam turbine exhaust outlet pipe. For some reason this is not fixed in its correct position, beneath the pump. This is presumably because the fixings are lost or damaged, or maybe no-one knows where it is supposed to fit.

This is different angle, showing off the steam generator.

This is the C-Stoff and T-Stoff fuel flow/pressure equalising unit. C-Stoff enters here from the main pump and is carried forward to the jacket of the combustion chamber.

Returning via the fuel filter in the background, the C-Stoff is then metered to the combustion chamber. Flow rates of this fuel through this unit govern rates of flow of the T-Stoff in its corresponding side.

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