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16 May 2025
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Vintage: 1915 Dennis Brothers N Type Fire Engine (G810)
The North East Scottish Fire Heritage Trust Dennis N Type "Betsy" from Fraserburgh Blue Light Festival on Sunday with the information board written below. Source: Mathew Rooney, UK Preserved Fire Appliances
1915 Dennis Brothers N Type Fire Engine (G810) general details
Chassis No.: 4033
Body No.: 4421
Engine No.: 7900
Gearbox No.: 1440
Rear Axle No.: 1474
Engine and performance
Manufacturer: White & Poppe
Engine Size: 9.2 litres
Cylinders: 4 (with 2 spark plugs per cylinder)
Horsepower: 70hp @ 1 160rpm
Fuel Type: Petrol
Fuel Tank: 20-gallon (90-litre) copper tank under driver’s seat
Fuel System: Gravity-fed to an updraft carburettor
Fuel Usage: ~7mpg (2.5km/l) while driving; 1 gallon (4.5 litres) every 10 minutes when pumping
Top Speed (Original): 55mph (88km/h)
Top Speed (Current): 45mph (72km/h)
Ignition and starting
Primary source: 6-Volt battery
Starting Method: Hand crank to top dead centre
Spark system:
1. Battery powers trembler coil
2. Trembler sends low-tension spark to distributor
3. Distributor sends high-tension spark to first spark plug set
4. After start, magneto powers the second plug set
Transmission and braking
Gears: 4 forward, 1 reverse
Clutch: Dry cone clutch
Brakes:
- Hand Lever: Rear wheel metal-to-metal brake shoes
- Foot Pedal: Clamp on the drive shaft
Wheels and tyres
Original Tyres: Solid rubber by Avon Tyre Company
Original Wheels: Solid disc
Current Wheels: Spoked (fitted in 1929)
Firefighting Equipment
Pump Type: Three-stage centrifugal pump
Drive System: Power Take-Off from gearbox
Output: 500 gallons (2 250 litres) per minute at 150PSI (10 bar)
Water Jet Height: Over 100 feet (30 metres)
Water Source: No onboard tank — water drawn from hydrants, rivers or ponds
Modern Compatibility: Can connect to modern fire hoses
1915 Dennis Brothers N Type Fire Engine (G810) general details
Chassis No.: 4033
Body No.: 4421
Engine No.: 7900
Gearbox No.: 1440
Rear Axle No.: 1474
Engine and performance
Manufacturer: White & Poppe
Engine Size: 9.2 litres
Cylinders: 4 (with 2 spark plugs per cylinder)
Horsepower: 70hp @ 1 160rpm
Fuel Type: Petrol
Fuel Tank: 20-gallon (90-litre) copper tank under driver’s seat
Fuel System: Gravity-fed to an updraft carburettor
Fuel Usage: ~7mpg (2.5km/l) while driving; 1 gallon (4.5 litres) every 10 minutes when pumping
Top Speed (Original): 55mph (88km/h)
Top Speed (Current): 45mph (72km/h)
Ignition and starting
Primary source: 6-Volt battery
Starting Method: Hand crank to top dead centre
Spark system:
1. Battery powers trembler coil
2. Trembler sends low-tension spark to distributor
3. Distributor sends high-tension spark to first spark plug set
4. After start, magneto powers the second plug set
Transmission and braking
Gears: 4 forward, 1 reverse
Clutch: Dry cone clutch
Brakes:
- Hand Lever: Rear wheel metal-to-metal brake shoes
- Foot Pedal: Clamp on the drive shaft
Wheels and tyres
Original Tyres: Solid rubber by Avon Tyre Company
Original Wheels: Solid disc
Current Wheels: Spoked (fitted in 1929)
Firefighting Equipment
Pump Type: Three-stage centrifugal pump
Drive System: Power Take-Off from gearbox
Output: 500 gallons (2 250 litres) per minute at 150PSI (10 bar)
Water Jet Height: Over 100 feet (30 metres)
Water Source: No onboard tank — water drawn from hydrants, rivers or ponds
Modern Compatibility: Can connect to modern fire hoses