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The Engines
(1945 Lister A)

1929 Lister D  1931 Lister DK  Other Engines

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Lister A type engines were manufactured  by R A Lister & Co Ltd of Dursley in Gloucestershire for nearly forty years.
The first engine was built on 29th August 1923 and the last on 8th December 1962.  They were available in 2.5 or 3.0 horsepower.
The first engines had only one flywheel but from 1925 twin flywheel engines were produced.

This engine was supplied to Southern Counties of Salisbury on 15th September 1945.
I have owned it since 1997, when it was in fully working order.  It only required a service, a repaint
and some cosmetic work for it to be in rally condition.  As you can see from the photos I usually rally this
engine driving a 110volt DC generator which produces 400 watts.  I made a lighting box which takes six 60w lamps.
This gives the engine a load and makes an interesting display.



This photo shows the A running at the old Bursledon brickworks.
This is before I had a dynamo for it to run and so it is just idling away.
They prefer to run on load and so it was much happier after the dynamo and lights were fitted.

This is the same venue, but with the dynamo and lights.  I had the large silencer "pot" connected
here which makes the engine run very quietly.  This was before a proper tensioner was
designed for the dynamo and so it tended to rattle a bit in the early days.

Here we are at Twyford water works fiddling around with something or other.
Note Bessie in the background and the silencer "pot" is still in use at this stage.

This is another view of the A at the brick works.
You can just make out the "proper" exhaust here.  Note the steam issuing from the hopper.

ListerALighting.jpg (112368 bytes)

Here the A is in full display mode and running well.

I was presented with a rally plaque by no other than Fred Dibnah when at Twyford Waterworks in May 2000.  See 'The Engines' page for photos.

Video Clips...

Lister A Video Clip 01

Click on the picture to see a short video clip of the "A" running at Twyford Waterworks.
Windows Media Player should open and the file be downloaded and played.
Alternatively, right click and "save target as" to a temporary folder on your computer and run it from there.
The file is less than 300KB and will only take a few seconds on broadband.

Two things to note about the above video clip...
1. There is a stroboscopic effect on the flywheel which makes it appear to run very slowly.  This is due to the low number of frames per second of the clip.
2.  See how the DC generator would shake before the new tensioning system was fitted.

Lister A Video Clip 02

This clip of the "A" was taken outside my garage.
You can clearly see the 12volt and 110volt dynamos.  The black
box on top of the 110volt dynamo contains the socket for plugging in the lighting board.

Lister A Video Clip 03

Here's another one outside the garage.
In this one you can see the fuel pump working through the flywheel, and also the inlet and exhaust valves operating.

The Technical Section...

3 HP at 600RPM
900cc (although not usually quoted for stationary engines,
            only horse power used)
Specification - A69
Spark plug gap - 20thou
Points gap - 10-12thou
Inlet valve clearance (cold) - 10thou
Exhaust valve clearance (cold) - 12thou
Ignition timing - 18deg BTDC
110v DC 
Generator Tensioner.
ListerA 110v Dynamo Tensioner.jpg (60039 bytes)

I spent some time pondering over how to make a simple but effective drive belt tensioner.
I decided that the easiest way was to pivot the generator at the rear, and allow the front to
move up and down on a thread.  The tensioning is achieved by moving the lock nut and adjusting
the wing nut from under the base plate.  This arrangement seems to work very well.

12v DC
Generator Tensioner.
ListerA 12v Dynamo Tensioner.jpg (53086 bytes)

Having completed the tensioner for the 110v generator,
the same principal was applied to the 12v one.  This generator,
being physically smaller, creates a smaller arc when moved up and down on the
pivot, and so a slight modification was made to allow for this extra movement. 
The end result also works well.


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