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Mercedes-Benz 1628S with spoiler Scale 1:25

Mercedes-Benz 1628S with spoiler Scale 1:25

36.98

The truck range designated the New Generation that was built from ...
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Tamco 2.4ghz Receiver

16.99

Tamco 2.4ghz Receiver
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German Submarine Type XXVIIB "Seehund"

German Submarine Type XXVIIB

12.98

The mini-sub "Seehund" was the end result of a development of ...
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Joysway 3Bl Alu Propeller (37mm Dia) - 92H

Joysway 3Bl Alu Propeller (37mm Dia) - 92H

44.75

For Super X-Blaze, Super Sea Fire & Super Surge Crusher
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Fouga CM.170 Magister 1:72

Fouga CM.170 Magister 1:72

10.99

Designed and produced in France in 1956, the Magister became the ...
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Ming Yang Stop Plug w/Mount Ring (Pk2)

Ming Yang Stop Plug w/Mount Ring (Pk2)

2.99

Instead of using a screw or bolt to blank off a ...
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Vela One Metre 2.4GHZ Sailboat

Vela One Metre 2.4GHZ Sailboat

290.99

While the Vela One Meter sailboat is easy enough for beginners, ...
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Dragon Force - Boat Stand

Dragon Force - Boat Stand

11.99

Joysway Dragon Force - Boat Stand For all versions of Dragonforce.
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Best Sellers

Universal Joint

Universal Joint

2.20

Modular type universal joint, requires inserts to complete.
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Aliphatic Rapid Glue 145ml

Aliphatic Rapid Glue 145ml

3.59

Outperforms traditional white glues with it's super fast grab time and ...
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Microsnips (Rigging Snips)

Microsnips (Rigging Snips)

4.03

Versatile Japanese style scissors. Very fine surgically sharp blades gives a ...
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Admiralty Glues Medium Superglue 20g Standard

Admiralty Glues Medium Superglue 20g Standard

2.50

Caldercraft Admiralty Glues Standard Cyanoacrylate (superglue) is a high quality modelling ...
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Amati Loom-a-Line

Amati Loom-a-Line

10.50

Amati's Loom-a-line is a handy rigging jig for naval models of ...
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Rapid Wood Glue (1015)

Rapid Wood Glue (1015)

3.10

A quality rapid white glue. 100ml. This is a very strong ...
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Nail Fixer / Pin Pusher - 8175

Nail Fixer / Pin Pusher - 8175

7.61

Mantua Nail Fixer. This tool is spring loaded. A pin/nail is ...
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Plain Coupling Insert 2.3mm

Plain Coupling Insert 2.3mm

2.00

2.3mm Plain Insert, Includes grub screw
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Jet Drives

Cornwall Model Boats | Hardware & Accessories | Drive Sets & Units |  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 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: 166.99 (Including VAT at 20%)
Euros: 207.07 (Inc VAT) / US Dollars: US$215.70 (Tax Free)


Quantity:  


This item is temporarily unavailable. Please Click here for an expected delivery date.

Customers who bought this item also bought:
1. 49mm Impeller for Graupner Jet Drive (Ref: G2347.1)
2. 2221.1 Graupner Flexible 3 Pin Coupling Single 5-7mm (Ref: G2221.1)
3. Raboesch Bow Thruster 30/33mm x148mm (Ref: RAB108-30)
4. Hitec HS5485MG Digital Servo (Ref: P2217580)

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: 32.50 (Including VAT at 20%)
Euros: 40.30 (Inc VAT) / US Dollars: US$41.97 (Tax Free)


Quantity:  

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: 22.79 (Including VAT at 20%)
Euros: 28.26 (Inc VAT) / US Dollars: US$29.43 (Tax Free)


Quantity:  

Replacement Impellers

Replacement impellers for the Graupner Jet Drive Units

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: 10.66 (Including VAT at 20%)
Euros: 13.21 (Inc VAT) / US Dollars: US$13.76 (Tax Free)


Quantity:  


Customers who bought this item also bought:
1. Graupner Jet Propulsion Unit 5 (2347) (Ref: G2347)
2. 3373 Graupner Coupling Sleeve 5mm (Ref: G3373)
3. 2221.1 Graupner Flexible 3 Pin Coupling Single 5-7mm (Ref: G2221.1)
4. 2221 Graupner Flexible 3 Pin Coupling Double M6-7mm (Ref: G2221)

Replacement Parts for Graupner Jet Drives

Replacement parts for the Graupner Jet Drive Units

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: 9.70 (Including VAT at 20%)
Euros: 12.02 (Inc VAT) / US Dollars: US$12.52 (Tax Free)


Quantity:  


Customers who bought this item also bought:
1. Vitalbond 30 Min Epoxy 240g (Ref: VB39)
2347.7 Nozzle Guide Vane for Jet Unit 5

2347.7 Nozzle Guide Vane for Jet Unit 5

Nozzle guide vane for Jet Propulsion unit 5 (2347)
Part No: G2347.7

Price: 16.98 (Including VAT at 20%)
Euros: 21.06 (Inc VAT) / US Dollars: US$21.93 (Tax Free)


Quantity:  


Customers who bought this item also bought:
1. 49mm Impeller for Graupner Jet Drive (Ref: G2347.1)

Cornwall Model Boats | Hardware & Accessories | Drive Sets & Units |  Jet Drives