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Revenge 1577 Elizabethan Navy Royal Warship 1:64

Revenge 1577 Elizabethan Navy Royal Warship 1:64

368.95

The Elizabethan Navy Royal warship Revenge was built at Deptford and ...
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McLaren Honda MP4-13

McLaren Honda MP4-13

24.98

The champion of the 1998 Formula One season is recreated in ...
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Guns Of History 3'' Ordnance Rifle 1:16 Scale

Guns Of History 3'' Ordnance Rifle 1:16 Scale

62.95

Guns Of History 3'' Ordnance Rifle 1:16 Scale The wrought ...
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McLaren Honda MP4/5B

McLaren Honda MP4/5B

24.98

In the trusty hands of A. Senna and G. Berger, the ...
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Guns Of History 18c. Deck Carronade 32 Pounder 1:24 Scale

Guns Of History 18c. Deck Carronade 32 Pounder 1:24 Scale

44.95

Guns Of History 18c. Deck Carronade 32 Pounder 1:24 Scale ...
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US Brig Syren 1:64

US Brig Syren 1:64

269.95

USS Syren, a 240-ton brig, was built by Nathaniel Hutton at ...
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McLaren Honda MP4/4

McLaren Honda MP4/4

24.98

Unleashed on the world at the opening race of the 1988 ...
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ELCO 80' PT Boat Crew 1:35 Scale

ELCO 80' PT Boat Crew 1:35 Scale

17.99

PT BOAT CREW 10 Figures Included
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Best Sellers

Universal Joint - Red

Universal Joint - Red

2.20

Modular type universal joint, requires inserts to complete. Old Part No. ...
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Plain Coupling Insert 4mm

Plain Coupling Insert 4mm

2.00

4mm Plain Insert, Includes grub screw Old Part No. C8007
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Universal Joint - Black

Universal Joint - Black

2.20

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

1022 White Wood Filler

4.70

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

2.00

3.2mm Plain Insert, Includes grub screw Old Part No. C8016
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Plain Coupling Insert 5mm

Plain Coupling Insert 5mm

2.00

5mm Plain Insert, Includes grub screw Old Part No. C8009
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Threaded Coupling Insert M4

Threaded Coupling Insert M4

2.00

M4 Threaded Insert Old Part No. C8011
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Plain Coupling Insert 2mm

Plain Coupling Insert 2mm

2.00

2mm Plain Insert, Includes grub screw Old Part No. C8004
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Jet Drives

Cornwall Model Boats | Hardware & Accessories | Drive Units & Outboards |  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
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Price: 159.98 (Including VAT at 20%)
Euros: 219.18 (Inc VAT) / US Dollars: US$203.98 (Tax Free)


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

Customers who bought this item also bought:
1. ENERG Pro Marine 90 SBEC ESC (90A)(w/cooled) (Ref: P4404984)
2. Hitec HS5485MG Digital Servo (Ref: P2217580)
3. Graupner HPD 2948-3760 7.4V Brushless Motor (Ref: G7757)

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: 44.52 (Inc VAT) / US Dollars: US$41.43 (Tax Free)


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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: 28.49 (Including VAT at 20%)
Euros: 39.03 (Inc VAT) / US Dollars: US$36.32 (Tax Free)


Quantity:  


Customers who bought this item also bought:
1. 2347.5 Sealing Ring for Jet Unit 5 (Ref: G2347.5)

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: 14.99 (Including VAT at 20%)
Euros: 20.53 (Inc VAT) / US Dollars: US$19.11 (Tax Free)


Quantity:  


Customers who bought this item also bought:
1. Graupner Jet Propulsion Unit 5 (2347) (Ref: G2347)

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: 8.99 (Including VAT at 20%)
Euros: 12.31 (Inc VAT) / US Dollars: US$11.46 (Tax Free)


Quantity:  


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

Customers who bought this item also bought:
1. Vitalbond 30 Min Epoxy 240g (Ref: VB39)
2. Graupner Steering Nozzle With Reversing Bucket (2346.1) (Ref: G2346.1)
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: 15.95 (Including VAT at 20%)
Euros: 21.85 (Inc VAT) / US Dollars: US$20.33 (Tax Free)


Quantity:  

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