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RMS Titanic

RMS Titanic

£899.99

The RMS Titanic was a passenger ship of the British White ...
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19000 Work Support Tool ( Keel Clamp)

19000 Work Support Tool ( Keel Clamp)

£12.42

Occre Work Support Tool ( Keel Clamp)
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19102 Display Stand 130x265mm

19102 Display Stand 130x265mm

£22.43

Display Stand including Pedestals 130x265mm
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19101 Display Stand 120x240mm

19101 Display Stand 120x240mm

£20.40

Display Stand including Pedestals 120x240mm
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Humbrol RC423 Carmine

Humbrol RC423 Carmine

£1.60

Humbrol RC423 Carmine 14ml Matt Acrylic Tinlet A water-based Acrylic paint ...
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Humbrol RC424 BR Cream

Humbrol RC424 BR Cream

£1.60

Humbrol RC424 BR Cream 14ml Matt Acrylic Tinlet A water-based Acrylic ...
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Humbrol RC421 Virgin Red

Humbrol RC421 Virgin Red

£1.60

Humbrol RC421 Virgin Red 14ml Matt Acrylic Tinlet A water-based Acrylic ...
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Humbrol RC422 Intercity Grey

Humbrol RC422 Intercity Grey

£1.60

Humbrol RC422 Intercity Grey 14ml Matt Acrylic Tinlet A water-based Acrylic ...
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Humbrol 90 BEIGE GREEN 150ml MATT Modellers Spray

Humbrol 90 BEIGE GREEN 150ml MATT Modellers Spray

£4.99

Humbrol 90 BEIGE GREEN 150ml MATT Modellers Spray
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Humbrol 64 LIGHT GREY 150ml MATT Modellers Spray

Humbrol 64 LIGHT GREY 150ml MATT Modellers Spray

£4.99

Humbrol 64 LIGHT GREY 150ml MATT Modellers Spray
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Best Sellers

Universal Joint

Universal Joint

£2.46

Modular type universal joint, requires inserts to complete.
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1022 White Wood Filler

1022 White Wood Filler

£2.95

White wood filler, very light, quick drying and sands easily, specially ...
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Plain Coupling Insert 3.2mm

Plain Coupling Insert 3.2mm

£1.80

3.2mm Plain Insert, Includes grub screw
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Admiralty Glues Thin Superglue 20g Standard

Admiralty Glues Thin Superglue 20g Standard

£2.50

Caldercraft Admiralty Glues Standard Cyanoacrylate (superglue) is a high quality modelling ...
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Admiralty Glues Thick Superglue 20g Standard

Admiralty Glues Thick Superglue 20g Standard

£2.50

Caldercraft Admiralty Glues Standard Cyanoacrylate (superglue) is a high quality modelling ...
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Rapid Wood Glue (1015)

Rapid Wood Glue (1015)

£2.99

A quality rapid white glue. 100ml. This is a very strong ...
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Motor Suppression Kit

Motor Suppression Kit

£1.73

Set of capacitors. Suitable for the suppression of most model electric ...
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Plain Coupling Insert 4mm

Plain Coupling Insert 4mm

£1.80

4mm Plain Insert, Includes grub screw
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Jet Drives

CMB Online Store | Hardware & Accessories |  Jet Drives

Water Jet Drives

The Jet propulsion unit, also known as a water-jet unit, is primarily fitted to exclusive high-speed motor yachts, ferries, racing boots and similar full-size vessels. In principle this power system consists of a pump which sucks in water though an opening in the bottom of the hull, accelerates it by means of an impeller, then forces it out again through an opening in the stern. Newton’s law of motion now applies: the jet of water expelled at the rear generates an equal and opposite reaction in the boat’s hull.

Boats with Jet propulsion units can operate in very shallow waters, as all the parts usually mounted below the hull, such as propeller, shaft, shaft bracket and rudder, are eliminated. Initial acceleration with a jet unit is very high, and this can be a distinct advantage in certain types of boat such as dragsters. The heeling moment produced by conventional boat propellers is completely absent. Since the water in a Jet propulsion system has to cover long distances in narrow ducts, there are inevitable friction losses which require rather more energy than for an orthodox power system.

Graupner Mini Jet (2349)

Graupner Mini Jet (2349)

 The Mini-Jet is used in the Jet Star model motor yacht, but can also be used for other small and medium-sized boats. It provides very accurate control in forwards and reverse mode alike. All parts are injection-moulded in plastic except the shaft, which is of 3 mm diameter stainless steel. It is sealed at one end and runs in twin sintered bushes. The set includes the reversing flap and the motor coupling. Suitable for Speed 500 and 600 electric motors.

Length approx. 110mm, Length incl. reversing flap approx. 130mm
Width max. approx. 58mm, Height approx. 50mm, Impeller 19mm
Part No: G2349
More Information…

Price: £26.71 (Including VAT at 20%)
Euros: €32.59 (Inc VAT) / US Dollars: US$36.06 (Tax Free)

Quantity:  


This item is temporarily unavailable. Please Click here for an expected delivery date.
Customers who bought this item also bought:
1. 19mm Impeller for Graupner Jet Drive (Ref: G2349.2)
2. Plain Coupling Insert 3mm (Ref: C8006)
3. Plain Coupling Insert 3.2mm (Ref: C8016)
4. Universal Joint (Ref: C8000)
Graupner Jet Propulsion Unit (2340)

Graupner Jet Propulsion Unit (2340)

 The jet unit together with reversing mechanism No. G2340.1 and toothed belt reducer No. G2341 are designed for the Azimut Atlantic Challenger motor boat, but can also be installed in other similar models.

The set contains: inlet duct (2-part, vacuum-moulded in ABS plastic), impeller pipe, 40mm diameter impeller, outlet jet, guide vanes, steering jet (all parts injection-moulded plastic), 5mm diameter shaft with one ballrace, 8mm diameter stern tube.

Length approx. 250mm, Length incl. reversing mechanism approx. 290mm
Width approx. 58mm, Height approx. 70mm, Impeller 40mm
Part No: G2340
More Information...

Price: £59.75 (Including VAT at 20%)
Euros: €72.89 (Inc VAT) / US Dollars: US$80.66 (Tax Free)

Quantity:  


Customers who bought this item also bought:
1. Graupner Reversing Mechanism for Jet Propulsion Unit (2340.1) (Ref: G2340.1)
2. Graupner Jet propulsion unit gearbox (2341) (Ref: G2341)
3. Graupner Speed 700BB Turbo Neodym (6306) (Ref: G6306)
4. Graupner Jet Propulsion Unit 2 Booster (2345) (Ref: G2345)
Graupner Reversing Mechanism for Jet Propulsion Unit (2340.1)

Graupner Reversing Mechanism for Jet Propulsion Unit (2340.1)

 The set contains: flap, control yoke and mounting lugs (all parts injection-moulded plastic).
Part No: G2340.1
More Information...

Price: £16.96 (Including VAT at 20%)
Euros: €20.69 (Inc VAT) / US Dollars: US$22.89 (Tax Free)

Quantity:  


Customers who bought this item also bought:
1. Graupner Jet Propulsion Unit (2340) (Ref: G2340)
2. Graupner Jet propulsion unit gearbox (2341) (Ref: G2341)
3. Graupner Speed 700BB Turbo Neodym (6306) (Ref: G6306)
4. 359 Graupner 4 - 5mm Coupling Assembly (Ref: G359)
Graupner Jet propulsion unit gearbox (2341)

Graupner Jet propulsion unit gearbox (2341)

 The set contains: gearbox flange, two toothed belt pulleys, toothed belt. Required for high-revving electric motors, as it reduces current drain by about half.
Part No: G2341
More Information...

Price: £23.00 (Including VAT at 20%)
Euros: €28.06 (Inc VAT) / US Dollars: US$31.06 (Tax Free)

Quantity:  


Customers who bought this item also bought:
1. Graupner Reversing Mechanism for Jet Propulsion Unit (2340.1) (Ref: G2340.1)
2. Graupner Jet Propulsion Unit (2340) (Ref: G2340)
3. Graupner Speed 700BB Turbo Neodym (6306) (Ref: G6306)
4. 359 Graupner 4 - 5mm Coupling Assembly (Ref: G359)
Graupner Reversing Mechanism for Jet Propulsion Unit 2 (2344.1)

Graupner Reversing Mechanism for Jet Propulsion Unit 2 (2344.1)

 Reversing mechanism for JET Propulsion Unit 2 2344.1
The set contains: flange (injection-moulded plastic) and reversing flap (2-part, vacuum-moulded ABS, CNC-machined).
Part No: G2344.1
More Information...

Price: £17.17 (Including VAT at 20%)
Euros: €20.95 (Inc VAT) / US Dollars: US$23.18 (Tax Free)

Quantity:  


Customers who bought this item also bought:
1. Mtroniks Viper Marine 25 (Ref: VIP25M)
2. 55mm M4 Threaded 4 Blade R/H Brass A-Type Propeller (Ref: RAB147-19)
3. Robbe Flexible Coupling 3.2-4mm (Ref: R1445)
4. Water Scoop Set Plastic (Ref: P5511772)
Graupner Jet Propulsion Unit 2 Booster (2345)

Graupner Jet Propulsion Unit 2 Booster (2345)

 The Jet Propulsion 2 Booster, No. 2345, is designed for the Moonraker mega-yacht; one unit producing pure thrust and two fitted with control jets and reversing mechanisms. However, the units can be installed in other similar model boats.

The kit contains: suction pipe (2-part, vacuum-moulded in ABS plastic, CNC-machined), impeller tube, 29 mm diameter impeller, outlet jet, guide vanes (all parts injection-moulded plastic), stern tube 120 x 6mm diameter with shaft 145x4mm

Overall length approx. 220mm, Length incl. reversing mechanism approx. 280mm
Width approx. 42mm, Height approx. 60mm, Impeller 29mm
Part No: G2345
More Information...

Price: £38.50 (Including VAT at 20%)
Euros: €46.97 (Inc VAT) / US Dollars: US$51.97 (Tax Free)

Quantity:  


Customers who bought this item also bought:
1. Graupner Steering and Reversing Mechanism for Jet Booster 2 (2345.1) (Ref: G2345.1)
2. Graupner Jet Propulsion Unit (2340) (Ref: G2340)
3. 29mm Impeller for Graupner Jet Drive (Ref: G2344.2)
4. 359 Graupner 4 - 5mm Coupling Assembly (Ref: G359)
Graupner Steering and Reversing Mechanism for Jet Booster 2 (2345.1)

Graupner Steering and Reversing Mechanism for Jet Booster 2 (2345.1)

 Control jet with reversing mechanism 2345.1
The kit contains: control jet, tiller, reversing flap (2-part) and 2 lugs (all parts injection-moulded plastic)
Part No: G2345.1
More Information…

Price: £21.20 (Including VAT at 20%)
Euros: €25.87 (Inc VAT) / US Dollars: US$28.63 (Tax Free)

Quantity:  


Customers who bought this item also bought:
1. Graupner Jet Propulsion Unit 2 Booster (2345) (Ref: G2345)
2. 359 Graupner 4 - 5mm Coupling Assembly (Ref: G359)
3. Graupner Jet propulsion unit gearbox (2341) (Ref: G2341)
4. Graupner Speed 700BB Turbo 12V (6317) (Ref: G6317)
Graupner Jet Propulsion Unit 5 (2347)

Graupner Jet Propulsion Unit 5 (2347)

 The new JET propulsion unit is ideal for internal combustion engines, as thrust reversal is obtained by operating the reversing flap rather than by reversing the direction of rotation of the engine. The steering nozzle incorporates an integral cooling water nipple. Suitable power plants are internal combustion engines of 15 to 30 cc capacity, and electric motors rated at a minimum of 700 Watts output power.

Length approx. 285mm.Width approx. 78mm,
Height approx. 85mm, Impeller 49mm
Part No: G2347
More Information...

Price: £153.00 (Including VAT at 20%)
Euros: €186.66 (Inc VAT) / US Dollars: US$206.55 (Tax Free)

Quantity:  


Customers who bought this item also bought:
1. Rubber Pushrod Bellows (2) (Ref: R1400)
2. Ball Couplings (2) (Ref: M358)
3. 49mm Impeller for Graupner Jet Drive (Ref: G2347.1)
4. 2221 Graupner Flexible 3 Pin Coupling Double M6-7mm (Ref: G2221)

Related products:
1. 2221 Graupner Flexible 3 Pin Coupling Double M6-7mm (Ref: G2221)
2. 2221.1 Graupner Flexible 3 Pin Coupling Single 5-7mm (Ref: G2221.1)
Graupner Motor Mount for JET Propulsion Unit 6 Booster (2395.1)

Graupner Motor Mount for JET Propulsion Unit 6 Booster (2395.1)

 Special motor mount for JET Propulsion Unit 6 Booster with connecting hole for Speed 700 series and Ultra 1300-9M motors.
Part No: G2395.1
More Information…

Price: £27.59 (Including VAT at 20%)
Euros: €33.66 (Inc VAT) / US Dollars: US$37.24 (Tax Free)

Quantity:  


Customers who bought this item also bought:
1. Graupner Steering Nozzle With Reversing Bucket (2346.1) (Ref: G2346.1)
2. Graupner Speed 700BB Turbo 8.4V (6316) (Ref: G6316)
3. 359 Graupner 4 - 5mm Coupling Assembly (Ref: G359)
4. Graupner Mini Jet (2349) (Ref: G2349)
Graupner Steering Nozzle With Reversing Bucket (2346.1)

Graupner Steering Nozzle With Reversing Bucket (2346.1)

 The kit contains: steering nozzle, reversing flap and frame, mount, lugs and other parts (all parts injection-moulded plastic).
Part No: G2346.1
More Information...

Price: £20.70 (Including VAT at 20%)
Euros: €25.25 (Inc VAT) / US Dollars: US$27.95 (Tax Free)

Quantity:  


Customers who bought this item also bought:
1. Graupner Motor Mount for JET Propulsion Unit 6 Booster (2395.1) (Ref: G2395.1)
2. Graupner Speed 700BB Turbo 8.4V (6316) (Ref: G6316)
3. 359 Graupner 4 - 5mm Coupling Assembly (Ref: G359)

Replacement Impellers

Replacement impellers for the Graupner Jet Drive Units

19mm Impeller for Graupner Jet Drive

19mm Impeller for Graupner Jet Drive

 19mm Impeller & Shaft for the following Jet drive unit: 2349
Part No: G2349.2

Price: £4.20 (Including VAT at 20%)
Euros: €5.12 (Inc VAT) / US Dollars: US$5.67 (Tax Free)

Quantity:  


Customers who bought this item also bought:
1. Graupner Mini Jet (2349) (Ref: G2349)
2. Universal Joint (Ref: C8000)
3. Plain Coupling Insert 3mm (Ref: C8006)
4. Plain Coupling Insert 3.2mm (Ref: C8016)
29mm Impeller for Graupner Jet Drive

29mm Impeller for Graupner Jet Drive

 29mm Impeller for the following Jet drive units: 2344, 2345, 2346, 2395
Part No: G2344.2

Price: £5.00 (Including VAT at 20%)
Euros: €6.10 (Inc VAT) / US Dollars: US$6.76 (Tax Free)

Quantity:  


Customers who bought this item also bought:
1. Graupner Jet Propulsion Unit 2 Booster (2345) (Ref: G2345)
2. 19mm Impeller for Graupner Jet Drive (Ref: G2349.2)
3. Graupner Jet Propulsion Unit (2340) (Ref: G2340)
4. 40mm Impeller for Graupner Jet Drive (Ref: G2340.2)
40mm Impeller for Graupner Jet Drive

40mm Impeller for Graupner Jet Drive

 40mm Impeller for the following Jet drive unit: 2340
Part No: G2340.2

Price: £6.85 (Including VAT at 20%)
Euros: €8.36 (Inc VAT) / US Dollars: US$9.25 (Tax Free)

Quantity:  


Customers who bought this item also bought:
1. Graupner Jet Propulsion Unit (2340) (Ref: G2340)
2. Graupner Jet propulsion unit gearbox (2341) (Ref: G2341)
3. Graupner Jet Propulsion Unit 2 Booster (2345) (Ref: G2345)
4. Graupner Reversing Mechanism for Jet Propulsion Unit (2340.1) (Ref: G2340.1)
49mm Impeller for Graupner Jet Drive

49mm Impeller for Graupner Jet Drive

 49mm Impeller for the following Jet drive unit: 2347 & 2348
Part No: G2347.1

Price: £9.20 (Including VAT at 20%)
Euros: €11.23 (Inc VAT) / US Dollars: US$12.43 (Tax Free)

Quantity:  


Customers who bought this item also bought:
1. 2347.5 Sealing Ring for Jet Unit 5 (Ref: G2347.5)
2. Rubber Pushrod Bellows (2) (Ref: R1400)
3. Ball Couplings (2) (Ref: M358)
4. 2.5mm Brass Rod 300mm (Ref: KSM56)

Replacement Parts for Graupner Jet Drives

Replacement parts for the Graupner Jet Drive Units

2340.3 Control Nozzle for 2340 Jet Propulsion Unit

2340.3 Control Nozzle for 2340 Jet Propulsion Unit

 Control Nozzle for 2340Jet Propulsion Unit
Part No: G2340.3

Price: £8.75 (Including VAT at 20%)
Euros: €10.67 (Inc VAT) / US Dollars: US$11.81 (Tax Free)

Quantity:  

2347.5 Sealing Ring for Jet Unit 5

2347.5 Sealing Ring for Jet Unit 5

 Rubber shaft sealing ring for Jet Propulsion unit 5 (2347)
Part No: G2347.5

Price: £8.95 (Including VAT at 20%)
Euros: €10.92 (Inc VAT) / US Dollars: US$12.09 (Tax Free)

Quantity:  


Customers who bought this item also bought:
1. 49mm Impeller for Graupner Jet Drive (Ref: G2347.1)
2. 346 Graupner 5 - 6 mm Coupling Assembly (Ref: G346)

CMB Online Store | Hardware & Accessories |  Jet Drives

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Cornwall Model Boats Ltd, Unit 4D, Highfield Road Ind Estate, Camelford, Cornwall, PL32 9RA, England
Phone: 01840 211009 (International +44 1840 211009)