Specialists in Automotive, Aviation & Emergency Power

Coolspool Hybrid 300

Small high-efficiency three cylinder diesel engine able to run on diesel or jet A1 fuel, direct coupled to a generator. Depending on specification, this provides continuous AC or DC power and very high amperage for starting turbines or powering aircraft systems for short duration by using internal batteries.

  • 4000 peak amps
  • 300A continuous current
  • Support 24V/26V and 28.5V DC systems
  • Galvanised chassis
  • 110V/230V 50/60Hz power outlets
  • Three cylinder integral engine
  • -20 to +70°C operating temperature
  • 4 meter heavy duty rubber nato plug lead

Product Information

Product Information

Powered by a 3-cylinder water-cooled Yanmar diesel engine, the Scammer Hybrid is the latest model of Powervamp’s compact low cost diesel GPU, developed for regional DC aircraft operators and FBOs requiring continuous ripple free power in the hangar and remote power for line operations and turbine starting on the ramp. No other GPU delivers the versatility and convenience of Powervamp’s Scammer 300.

Depending on specification, this compact and efficient diesel GPU provides continuous AC or DC power. Very high DC amperage from its ultra-high-discharge batteries is available instantly for turbine starts and short-term loads that may exceed the generator’s continuous output.

Originally developed in 1995 for the UK military as a low cost sel-contained GPU designed to supply continuous DC power all day for pre-flight/avionics and random turbine starting, the latest Scammer 300 delivers up to 300A continuously at 28V, either from the diesel generator or by connecting the GPU to a 3-phase mains supply, thereby allowing it to be used in confined spaces.

A selector switch directs generator output to either the 28V DC or 110/230V single phase outlets (depending on specification), enabling the GPU to provide continuous mains AC power for multiple uses. In enclosed spaces such as maintenance shops or hangars, with the diesel engine shut down and the unit connected to a mains supply, the Scammer 300 while providing 28V, will automatically recharge its integral batteries.

Available In various configurations and in series production over 17 years, with sales to several armed forces, the latest Scammer Hybrid is the civil version for FBOs, regional airlines, and operators requiring versatile remote power at a fraction of the cost of a conventional diesel GPU..

Supplied with:

4m Hard Wired Nato Lead

4m Hard Wired Nato Lead

Spare Wheel

Spare Wheel

Wheel Brake System

Wheel Brake System

Typical power plant*

PT6C-67, ALF 502, TPE331, TFE 731, AE3007A, or power plants of a similar specification

Scammer 300

Pre-flights: All DC business jets, small commuters. Air-con: up to 400 amps continuous, peak to 1400 amps, short term 200–400 amps until voltage limit warning.

Turbine starting: All DC business jets

All Features

All Features

  • Up to 4000 peak amps for aircraft starting
  • Support 24/26V and 28.5V DC systems
  • Up to 300 amps continuous at 28.5V DC
  • Additional 110V/230V 50/60Hz power outlets for general ramp use
  • Shore power capability for aircraft maintenance supply within hangar
  • Ability to recharge external ground power units via power output socket
  • Easy to manoeuvre and transport between operational bases
  • Simple to service and maintain
  • Modular designs to suit operator requirements
  • Reverse current protection
  • Reverse polarity protection
  • Complies with ISO 6858

Technical Specs

Technical Specifications

DC Output
Rated Power 8.4 kW
Continuos Current 300 Amps
Peak Current (Batteries) 1400 Amps
Voltage 28V (other voltage available)
Output Cable 4 x 70sqmm 4m (12ft)
Output Connector 3-Pin aviation connector
AC Output
Voltage 90V-264V AC
Frequency 43-63Hz
Make Yanmar
Number of cylinders 3
Fuel Diesel / Jet A1
Cooling system Liquid
Aspiration Naturally aspirated
Rated speed 3000/3600 rpm
Output 3 Phases, 50/60 Hz, 230/110/400V
Rated speed 3000/3600 rpm
Output power (Class H) 10 kVA @3000rpm, 12 KVA @3600rpm
Power supplies
Number 3 in Parallel - modular design
Output power 3 KW each
Output Continuous Current 100 amps each
Protections Over voltage, over temperature, over load
Working temperature -20 to +70°C
Peak amps 2000A
Voltage 6V
Number 4 connected in series
Capacity 130 Ah
Control panel
Fuel level gauge
Digital voltmeter and ammeter
LED for output ON
Engine Control Module isolator
Operating mode selector
Features Input Plug and Output Socket
Pull to connect output switch
Emergency Stop
LEDs for Power Supplies condition
LED Fault and Buzzer for low batteries voltage
Tyres Standard Pneumatic 4.00-8
Suspension Hot dip galvanised flexible rear arm with rubber suspension
Brake Adjustable foot activated brake on front wheels
Fuel Tank Stainless Steel Tank
33 Litres-All day operation
Easy removable Tank for air transportation
Forklift points 2 lifting points in both sides
Air Transportation Yes
Chassis Hot Dip Galvanized Steel
Panels Powder coated yellow aluminium with cam lock type fittings
Towable Speed 10 mph - 16 kph
Tow Eye Dimension 50 mm - 2 inch
Dimensions Height 1244mm (49in) Length 1885mm (74in) Width 898mm (35in)
Dry Weight 535 Kg / 1179 lbs
ISO 6858 Aircraft ground support electrical supplies - general requirements
ISO 461/1 Aircraft connectors for ground electrical supplies
ISO 461/2 Design, performance and test requirements, dimensions
STANAG 3632 AE (option) Aircraft and ground support equipment electrical connections for static grounding
AEP-24 (option) Aircraft electrical hazards on the flight line


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ISO Accreditation Alcumus Accreditation ECS Accreditation RISQS Accreditation
ISO Accreditation RISQS Accreditation ECS Accreditation Alcumus Accreditation