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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.

CEM Jet Propulsion Unit 78

CEM Jet Propulsion Unit 78


Price: 145.92 (Including VAT at 20%)
Euros: 161.97(Inc VAT) / US Dollars: US$153.22(Tax Free)

Part No: CEM2000

Graupner Mini Jet Complete with Motor

Graupner Mini Jet Complete with Motor


Price: 57.47 (Including VAT at 20%)
Euros: 63.79(Inc VAT) / US Dollars: US$60.34(Tax Free)

Part No: G2349

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Graupner Jet Propulsion Unit 5 (2347)

Graupner Jet Propulsion Unit 5 (2347)


Price: 149.99 (Including VAT at 20%)
Euros: 166.49(Inc VAT) / US Dollars: US$157.49(Tax Free)

Part No: G2347

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Replacement Impellers

Replacement impellers for the Graupner Jet Drive Units

49mm Impeller for CEM Jet Drive & Graupner Jet Drive

49mm Impeller for CEM Jet Drive & Graupner Jet Drive


Price: 9.00 (Including VAT at 20%)
Euros: 9.99(Inc VAT) / US Dollars: US$9.45(Tax Free)

Part No: CEM2001

Replacement Parts for Graupner Jet Drives

Replacement parts for the Graupner Jet Drive Units

2347.1 Impellor 3 Bladet for Jet Unit 5

2347.1 Impellor 3 Bladet for Jet Unit 5


Price: 11.27 (Including VAT at 20%)
Euros: 12.51(Inc VAT) / US Dollars: US$11.83(Tax Free)

Part No: G2347.1

2347.3 Reverse Bucket for Jet Unit 5

2347.3 Reverse Bucket for Jet Unit 5


Price: 13.28 (Including VAT at 20%)
Euros: 14.75(Inc VAT) / US Dollars: US$13.95(Tax Free)

Part No: G2347.3

2347.4 Steering Nozzle for Jet Unit 5

2347.4 Steering Nozzle for Jet Unit 5


Price: 13.54 (Including VAT at 20%)
Euros: 15.02(Inc VAT) / US Dollars: US$14.21(Tax Free)

Part No: G2347.4

2347.5 Sealing Ring for Jet Unit 5

2347.5 Sealing Ring for Jet Unit 5


Price: 17.99 (Including VAT at 20%)
Euros: 19.97(Inc VAT) / US Dollars: US$18.89(Tax Free)

Part No: G2347.5

2347.7 Nozzle Guide Vane for Jet Unit 5

2347.7 Nozzle Guide Vane for Jet Unit 5


Price: 14.99 (Including VAT at 20%)
Euros: 16.64(Inc VAT) / US Dollars: US$15.74(Tax Free)

Part No: G2347.7

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2349.1 Coupling for Mini Jet Drive

2349.1 Coupling for Mini Jet Drive


Price: 8.50 (Including VAT at 20%)
Euros: 9.43(Inc VAT) / US Dollars: US$8.92(Tax Free)

Part No: G2349.1

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2349.2 Impeller with Shaft for Mini Jet Drive

2349.2 Impeller with Shaft for Mini Jet Drive


Price: 12.78 (Including VAT at 20%)
Euros: 14.19(Inc VAT) / US Dollars: US$13.42(Tax Free)

Part No: G2349.2

2349.3 Steering Nozzle for Mini Jet Drive

2349.3 Steering Nozzle for Mini Jet Drive


Price: 18.77 (Including VAT at 20%)
Euros: 20.83(Inc VAT) / US Dollars: US$19.71(Tax Free)

Part No: G2349.3

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2349.4 Housing for Mini Jet

2349.4 Housing for Mini Jet


Price: 10.67 (Including VAT at 20%)
Euros: 11.84(Inc VAT) / US Dollars: US$11.20(Tax Free)

Part No: G2349.4

2349.5 Driveshaft Seal

2349.5 Driveshaft Seal


Price: 3.60 (Including VAT at 20%)
Euros: 4.00(Inc VAT) / US Dollars: US$3.78(Tax Free)

Part No: G2349.5

2349.6 Brushless Motor Adaptor for Mini Jet Drive

2349.6 Brushless Motor Adaptor for Mini Jet Drive


Price: 4.14 (Including VAT at 20%)
Euros: 4.60(Inc VAT) / US Dollars: US$4.35(Tax Free)

Part No: G2349.6

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