mark, It's great to see another Classic Dennis such as this; any chance of more details concening it---year, capacity, where served, where preserved. Thanks, and what does lettering stand for?
As you will have realised this is very similar to the machine shown in picture 1605. At this time Dennis were referring to their Fire Engines by their pumping capacity. So this is the '250 Gallon' model capable of pumping 250 gallons per minute. Somewhere along the line it was also referred to as the Dennis Ajax, because of the ladder it carried. The engine is a 4 cylinder 3 litre unit with the gearbox and integral PTO bolted directly to the engine. This was the first 'Unit construction' Dennis as all previously had separate engine and gearboxes. Originally the engine was a sidevalve unit but soon evolved into an OHV unit. Externally there is very little difference with only the addition of an alloy rocker box sitting on top of the head.
Top speed of mine (which has the sidevalve engine ) is 40 mph. It really is very easy to drive. Very light on the steering (especially on solid tyres) and a light gear change. The foot brake is also very effective too.
Although it is hard to be categoric about anything Dennis I don't believe that any of this model had an internal water tank. Typically appliances of this era in England only ever had a 50 gallon tank (when they did have a tank...) and this was to feed am auxiliary low capacity hose reel pump. 50 gallons into the main pump wouldn't last very long.
Finally there was one further change away from the old type of construction found in the Dennis 'N' Types. For the first time the wooden body was 'skinned' with steel sheeting. This does lead to problems ith corrosion and Mark Brustolin the owner of the machine in the picture has had to re-skin his body completely during the restoration.
It's great to see another Classic Dennis such as this; any chance of more details concening it---year, capacity, where served, where preserved. Thanks, and what does lettering stand for?
Added by Bob Graham on 18 July 2008.